/*
Copyright (c) 2010-2016, Mathieu Labbe - IntRoLab - Universite de Sherbrooke
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the Universite de Sherbrooke nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "rtabmap/gui/DatabaseViewer.h"
#include "rtabmap/gui/CloudViewer.h"
#include "ui_DatabaseViewer.h"
#include <QMessageBox>
#include <QFileDialog>
#include <QInputDialog>
#include <QDesktopWidget>
#include <QGraphicsLineItem>
#include <QtGui/QCloseEvent>
#include <QGraphicsOpacityEffect>
#include <QtCore/QBuffer>
#include <QtCore/QTextStream>
#include <QtCore/QDateTime>
#include <QtCore/QSettings>
#include <rtabmap/utilite/ULogger.h>
#include <rtabmap/utilite/UDirectory.h>
#include <rtabmap/utilite/UConversion.h>
#include <opencv2/core/core_c.h>
#include <opencv2/highgui/highgui.hpp>
#include <rtabmap/utilite/UTimer.h>
#include <rtabmap/utilite/UFile.h>
#include "rtabmap/utilite/UPlot.h"
#include "rtabmap/core/DBDriver.h"
#include "rtabmap/gui/KeypointItem.h"
#include "rtabmap/gui/CloudViewer.h"
#include "rtabmap/utilite/UCv2Qt.h"
#include "rtabmap/core/util3d.h"
#include "rtabmap/core/util3d_transforms.h"
#include "rtabmap/core/util3d_filtering.h"
#include "rtabmap/core/util3d_surface.h"
#include "rtabmap/core/util3d_registration.h"
#include "rtabmap/core/util3d_mapping.h"
#include "rtabmap/core/util2d.h"
#include "rtabmap/core/Signature.h"
#include "rtabmap/core/Memory.h"
#include "rtabmap/core/Features2d.h"
#include "rtabmap/core/Compression.h"
#include "rtabmap/core/Graph.h"
#include "rtabmap/core/Stereo.h"
#include "rtabmap/core/Optimizer.h"
#include "rtabmap/core/RegistrationVis.h"
#include "rtabmap/core/RegistrationIcp.h"
#include "rtabmap/core/OccupancyGrid.h"
#include "rtabmap/gui/DataRecorder.h"
#include "ExportCloudsDialog.h"
#include "EditDepthArea.h"
#include "rtabmap/core/SensorData.h"
#include "rtabmap/core/GainCompensator.h"
#include "ExportDialog.h"
#include "rtabmap/gui/ProgressDialog.h"
#include "ParametersToolBox.h"
#include <pcl/io/pcd_io.h>
#include <pcl/io/ply_io.h>
#include <pcl/filters/voxel_grid.h>
#include <pcl/common/transforms.h>
#include <pcl/common/common.h>

#ifdef RTABMAP_OCTOMAP
#include "rtabmap/core/OctoMap.h"
#endif

namespace rtabmap {

DatabaseViewer::DatabaseViewer(const QString & ini, QWidget * parent) :
	QMainWindow(parent),
	dbDriver_(0),
	octomap_(0),
	exportDialog_(new ExportCloudsDialog(this)),
	editDepthDialog_(new QDialog(this)),
	savedMaximized_(false),
	firstCall_(true),
	iniFilePath_(ini)
{
	pathDatabase_ = QDir::homePath()+"/Documents/RTAB-Map"; //use home directory by default

	if(!UDirectory::exists(pathDatabase_.toStdString()))
	{
		pathDatabase_ = QDir::homePath();
	}

	ui_ = new Ui_DatabaseViewer();
	ui_->setupUi(this);
	ui_->buttonBox->setVisible(false);
	connect(ui_->buttonBox->button(QDialogButtonBox::Close), SIGNAL(clicked()), this, SLOT(close()));

	ui_->comboBox_logger_level->setVisible(parent==0);
	ui_->label_logger_level->setVisible(parent==0);
	connect(ui_->comboBox_logger_level, SIGNAL(currentIndexChanged(int)), this, SLOT(updateLoggerLevel()));
	connect(ui_->actionVertical_Layout, SIGNAL(toggled(bool)), this, SLOT(setupMainLayout(bool)));

	editDepthDialog_->resize(640, 480);
	QVBoxLayout * vLayout = new QVBoxLayout(editDepthDialog_);
	editDepthArea_ = new EditDepthArea(editDepthDialog_);
	vLayout->setContentsMargins(0,0,0,0);
	vLayout->setSpacing(0);
	vLayout->addWidget(editDepthArea_, 1);
	QDialogButtonBox * buttonBox = new QDialogButtonBox(QDialogButtonBox::Save | QDialogButtonBox::Cancel | QDialogButtonBox::Reset, Qt::Horizontal, editDepthDialog_);
	vLayout->addWidget(buttonBox);
	connect(buttonBox, SIGNAL(accepted()), editDepthDialog_, SLOT(accept()));
	connect(buttonBox, SIGNAL(rejected()), editDepthDialog_, SLOT(reject()));
	connect(buttonBox->button(QDialogButtonBox::Reset), SIGNAL(clicked()), editDepthArea_, SLOT(resetChanges()));
	editDepthDialog_->setLayout(vLayout);
	editDepthDialog_->setWindowTitle(tr("Edit Depth Image"));

	QString title("RTAB-Map Database Viewer[*]");
	this->setWindowTitle(title);

	ui_->dockWidget_constraints->setVisible(false);
	ui_->dockWidget_graphView->setVisible(false);
	ui_->dockWidget_occupancyGridView->setVisible(false);
	ui_->dockWidget_guiparameters->setVisible(false);
	ui_->dockWidget_coreparameters->setVisible(false);
	ui_->dockWidget_info->setVisible(false);
	ui_->dockWidget_stereoView->setVisible(false);
	ui_->dockWidget_view3d->setVisible(false);
	ui_->dockWidget_statistics->setVisible(false);

	// Create cloud viewers
	constraintsViewer_ = new CloudViewer(ui_->dockWidgetContents);
	cloudViewer_ = new CloudViewer(ui_->dockWidgetContents_3dviews);
	stereoViewer_ = new CloudViewer(ui_->dockWidgetContents_stereo);
	occupancyGridViewer_ = new CloudViewer(ui_->dockWidgetContents_occupancyGrid);
	constraintsViewer_->setObjectName("constraintsViewer");
	cloudViewer_->setObjectName("cloudViewerA");
	stereoViewer_->setObjectName("stereoViewer");
	occupancyGridViewer_->setObjectName("occupancyGridView");
	ui_->layout_constraintsViewer->addWidget(constraintsViewer_);
	ui_->horizontalLayout_3dviews->addWidget(cloudViewer_, 1);
	ui_->horizontalLayout_stereo->addWidget(stereoViewer_, 1);
	ui_->layout_occupancyGridView->addWidget(occupancyGridViewer_, 1);

	constraintsViewer_->setCameraLockZ(false);
	constraintsViewer_->setCameraFree();
	occupancyGridViewer_->setCameraFree();

	ui_->graphicsView_stereo->setAlpha(255);

#ifndef RTABMAP_OCTOMAP
	ui_->checkBox_octomap->setEnabled(false);
	ui_->checkBox_octomap->setChecked(false);
#endif

	ParametersMap parameters;
	uInsert(parameters, Parameters::getDefaultParameters("SURF"));
	uInsert(parameters, Parameters::getDefaultParameters("SIFT"));
	uInsert(parameters, Parameters::getDefaultParameters("BRIEF"));
	uInsert(parameters, Parameters::getDefaultParameters("FAST"));
	uInsert(parameters, Parameters::getDefaultParameters("GFTT"));
	uInsert(parameters, Parameters::getDefaultParameters("ORB"));
	uInsert(parameters, Parameters::getDefaultParameters("FREAK"));
	uInsert(parameters, Parameters::getDefaultParameters("BRISK"));
	uInsert(parameters, Parameters::getDefaultParameters("Optimizer"));
	uInsert(parameters, Parameters::getDefaultParameters("g2o"));
	uInsert(parameters, Parameters::getDefaultParameters("GTSAM"));
	uInsert(parameters, Parameters::getDefaultParameters("Reg"));
	uInsert(parameters, Parameters::getDefaultParameters("Vis"));
	uInsert(parameters, Parameters::getDefaultParameters("Icp"));
	uInsert(parameters, Parameters::getDefaultParameters("Stereo"));
	uInsert(parameters, Parameters::getDefaultParameters("StereoBM"));
	uInsert(parameters, Parameters::getDefaultParameters("Grid"));
	parameters.insert(*Parameters::getDefaultParameters().find(Parameters::kRGBDOptimizeMaxError()));
	parameters.insert(*Parameters::getDefaultParameters().find(Parameters::kRGBDLoopClosureReextractFeatures()));
	ui_->parameters_toolbox->setupUi(parameters);
	exportDialog_->setObjectName("ExportCloudsDialog");
	restoreDefaultSettings();
	this->readSettings();

	setupMainLayout(ui_->actionVertical_Layout->isChecked());
	ui_->checkBox_grid_cubes->setVisible(ui_->checkBox_octomap->isChecked());
	ui_->spinBox_grid_depth->setVisible(ui_->checkBox_octomap->isChecked());
	ui_->checkBox_grid_empty->setVisible(ui_->checkBox_octomap->isChecked());

	ui_->menuView->addAction(ui_->dockWidget_constraints->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_graphView->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_occupancyGridView->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_stereoView->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_view3d->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_guiparameters->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_coreparameters->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_info->toggleViewAction());
	ui_->menuView->addAction(ui_->dockWidget_statistics->toggleViewAction());
	connect(ui_->dockWidget_graphView->toggleViewAction(), SIGNAL(triggered()), this, SLOT(updateGraphView()));
	connect(ui_->dockWidget_occupancyGridView->toggleViewAction(), SIGNAL(triggered()), this, SLOT(updateGraphView()));
	connect(ui_->dockWidget_statistics->toggleViewAction(), SIGNAL(triggered()), this, SLOT(updateStatistics()));


	connect(ui_->parameters_toolbox, SIGNAL(parametersChanged(const QStringList &)), this, SLOT(notifyParametersChanged(const QStringList &)));

	connect(ui_->actionQuit, SIGNAL(triggered()), this, SLOT(close()));

	// connect actions with custom slots
	ui_->actionSave_config->setShortcut(QKeySequence::Save);
	connect(ui_->actionSave_config, SIGNAL(triggered()), this, SLOT(writeSettings()));
	connect(ui_->actionOpen_database, SIGNAL(triggered()), this, SLOT(openDatabase()));
	connect(ui_->actionExport, SIGNAL(triggered()), this, SLOT(exportDatabase()));
	connect(ui_->actionExtract_images, SIGNAL(triggered()), this, SLOT(extractImages()));
	connect(ui_->actionEdit_depth_image, SIGNAL(triggered()), this, SLOT(editDepthImage()));
	connect(ui_->actionGenerate_graph_dot, SIGNAL(triggered()), this, SLOT(generateGraph()));
	connect(ui_->actionGenerate_local_graph_dot, SIGNAL(triggered()), this, SLOT(generateLocalGraph()));
	connect(ui_->actionRaw_format_txt, SIGNAL(triggered()), this , SLOT(exportPosesRaw()));
	connect(ui_->actionRGBD_SLAM_format_txt, SIGNAL(triggered()), this , SLOT(exportPosesRGBDSLAM()));
	connect(ui_->actionKITTI_format_txt, SIGNAL(triggered()), this , SLOT(exportPosesKITTI()));
	connect(ui_->actionTORO_graph, SIGNAL(triggered()), this , SLOT(exportPosesTORO()));
	connect(ui_->actionG2o_g2o, SIGNAL(triggered()), this , SLOT(exportPosesG2O()));
	connect(ui_->actionView_3D_map, SIGNAL(triggered()), this, SLOT(view3DMap()));
	connect(ui_->actionGenerate_3D_map_pcd, SIGNAL(triggered()), this, SLOT(generate3DMap()));
	connect(ui_->actionDetect_more_loop_closures, SIGNAL(triggered()), this, SLOT(detectMoreLoopClosures()));
	connect(ui_->actionRefine_all_neighbor_links, SIGNAL(triggered()), this, SLOT(refineAllNeighborLinks()));
	connect(ui_->actionRefine_all_loop_closure_links, SIGNAL(triggered()), this, SLOT(refineAllLoopClosureLinks()));
	connect(ui_->actionRegenerate_local_grid_maps, SIGNAL(triggered()), this, SLOT(regenerateLocalMaps()));
	connect(ui_->actionRegenerate_local_grid_maps_selected, SIGNAL(triggered()), this, SLOT(regenerateCurrentLocalMaps()));
	connect(ui_->actionReset_all_changes, SIGNAL(triggered()), this, SLOT(resetAllChanges()));
	connect(ui_->actionRestore_default_GUI_settings, SIGNAL(triggered()), this, SLOT(restoreDefaultSettings()));

	//ICP buttons
	connect(ui_->pushButton_refine, SIGNAL(clicked()), this, SLOT(refineConstraint()));
	connect(ui_->pushButton_add, SIGNAL(clicked()), this, SLOT(addConstraint()));
	connect(ui_->pushButton_reset, SIGNAL(clicked()), this, SLOT(resetConstraint()));
	connect(ui_->pushButton_reject, SIGNAL(clicked()), this, SLOT(rejectConstraint()));
	ui_->pushButton_refine->setEnabled(false);
	ui_->pushButton_add->setEnabled(false);
	ui_->pushButton_reset->setEnabled(false);
	ui_->pushButton_reject->setEnabled(false);

	ui_->menuExport_poses->setEnabled(false);

	ui_->horizontalSlider_A->setTracking(false);
	ui_->horizontalSlider_B->setTracking(false);
	ui_->horizontalSlider_A->setEnabled(false);
	ui_->horizontalSlider_B->setEnabled(false);
	connect(ui_->horizontalSlider_A, SIGNAL(valueChanged(int)), this, SLOT(sliderAValueChanged(int)));
	connect(ui_->horizontalSlider_B, SIGNAL(valueChanged(int)), this, SLOT(sliderBValueChanged(int)));
	connect(ui_->horizontalSlider_A, SIGNAL(sliderMoved(int)), this, SLOT(sliderAMoved(int)));
	connect(ui_->horizontalSlider_B, SIGNAL(sliderMoved(int)), this, SLOT(sliderBMoved(int)));

	connect(ui_->spinBox_mesh_angleTolerance, SIGNAL(valueChanged(int)), this, SLOT(update3dView()));
	connect(ui_->spinBox_mesh_minClusterSize, SIGNAL(valueChanged(int)), this, SLOT(update3dView()));
	connect(ui_->spinBox_mesh_fillDepthHoles, SIGNAL(valueChanged(int)), this, SLOT(update3dView()));
	connect(ui_->spinBox_mesh_depthError, SIGNAL(valueChanged(int)), this, SLOT(update3dView()));
	connect(ui_->checkBox_mesh_quad, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->spinBox_mesh_triangleSize, SIGNAL(valueChanged(int)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showWords, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showCloud, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showMesh, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showScan, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showMap, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_showGrid, SIGNAL(toggled(bool)), this, SLOT(update3dView()));
	connect(ui_->checkBox_odomFrame_3dview, SIGNAL(toggled(bool)), this, SLOT(update3dView()));

	ui_->horizontalSlider_neighbors->setTracking(false);
	ui_->horizontalSlider_loops->setTracking(false);
	ui_->horizontalSlider_neighbors->setEnabled(false);
	ui_->horizontalSlider_loops->setEnabled(false);
	connect(ui_->horizontalSlider_neighbors, SIGNAL(valueChanged(int)), this, SLOT(sliderNeighborValueChanged(int)));
	connect(ui_->horizontalSlider_loops, SIGNAL(valueChanged(int)), this, SLOT(sliderLoopValueChanged(int)));
	connect(ui_->horizontalSlider_neighbors, SIGNAL(sliderMoved(int)), this, SLOT(sliderNeighborValueChanged(int)));
	connect(ui_->horizontalSlider_loops, SIGNAL(sliderMoved(int)), this, SLOT(sliderLoopValueChanged(int)));
	connect(ui_->checkBox_showOptimized, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	connect(ui_->checkBox_show3Dclouds, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	connect(ui_->checkBox_show2DScans, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	connect(ui_->checkBox_show3DWords, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	connect(ui_->checkBox_odomFrame, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	ui_->checkBox_showOptimized->setEnabled(false);

	ui_->horizontalSlider_iterations->setTracking(false);
	ui_->horizontalSlider_iterations->setEnabled(false);
	ui_->spinBox_optimizationsFrom->setEnabled(false);
	connect(ui_->horizontalSlider_iterations, SIGNAL(valueChanged(int)), this, SLOT(sliderIterationsValueChanged(int)));
	connect(ui_->horizontalSlider_iterations, SIGNAL(sliderMoved(int)), this, SLOT(sliderIterationsValueChanged(int)));
	connect(ui_->spinBox_optimizationsFrom, SIGNAL(editingFinished()), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_spanAllMaps, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->graphViewer, SIGNAL(mapShownRequested()), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_ignorePoseCorrection, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_ignorePoseCorrection, SIGNAL(stateChanged(int)), this, SLOT(updateConstraintView()));
	connect(ui_->checkBox_ignoreGlobalLoop, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_ignoreLocalLoopSpace, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_ignoreLocalLoopTime, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_ignoreUserLoop, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->spinBox_optimizationDepth, SIGNAL(editingFinished()), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_gridErode, SIGNAL(stateChanged(int)), this, SLOT(updateGrid()));
	connect(ui_->checkBox_octomap, SIGNAL(stateChanged(int)), this, SLOT(updateGrid()));
	connect(ui_->checkBox_grid_2d, SIGNAL(stateChanged(int)), this, SLOT(updateGrid()));
	connect(ui_->checkBox_grid_cubes, SIGNAL(stateChanged(int)), this, SLOT(updateOctomapView()));
	connect(ui_->spinBox_grid_depth, SIGNAL(valueChanged(int)), this, SLOT(updateOctomapView()));
	connect(ui_->checkBox_grid_empty, SIGNAL(stateChanged(int)), this, SLOT(updateOctomapView()));
	connect(ui_->doubleSpinBox_gainCompensationRadius, SIGNAL(valueChanged(double)), this, SLOT(updateConstraintView()));
	connect(ui_->doubleSpinBox_voxelSize, SIGNAL(valueChanged(double)), this, SLOT(updateConstraintView()));
	connect(ui_->doubleSpinBox_voxelSize, SIGNAL(valueChanged(double)), this, SLOT(update3dView()));
	connect(ui_->groupBox_posefiltering, SIGNAL(clicked(bool)), this, SLOT(updateGraphView()));
	connect(ui_->doubleSpinBox_posefilteringRadius, SIGNAL(editingFinished()), this, SLOT(updateGraphView()));
	connect(ui_->doubleSpinBox_posefilteringAngle, SIGNAL(editingFinished()), this, SLOT(updateGraphView()));

	connect(ui_->doubleSpinBox_gridCellSize, SIGNAL(editingFinished()), this, SLOT(updateGrid()));

	ui_->label_stereo_inliers_name->setStyleSheet("QLabel {color : blue; }");
	ui_->label_stereo_flowOutliers_name->setStyleSheet("QLabel {color : red; }");
	ui_->label_stereo_slopeOutliers_name->setStyleSheet("QLabel {color : yellow; }");
	ui_->label_stereo_disparityOutliers_name->setStyleSheet("QLabel {color : magenta; }");


	// connect configuration changed
	connect(ui_->graphViewer, SIGNAL(configChanged()), this, SLOT(configModified()));
	//connect(ui_->graphicsView_A, SIGNAL(configChanged()), this, SLOT(configModified()));
	//connect(ui_->graphicsView_B, SIGNAL(configChanged()), this, SLOT(configModified()));
	connect(ui_->comboBox_logger_level, SIGNAL(currentIndexChanged(int)), this, SLOT(configModified()));
	connect(ui_->actionVertical_Layout, SIGNAL(toggled(bool)), this, SLOT(configModified()));
	connect(ui_->checkBox_alignPosesWithGroundTruth, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_alignPosesWithGroundTruth, SIGNAL(stateChanged(int)), this, SLOT(updateGraphView()));
	connect(ui_->checkBox_timeStats, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_timeStats, SIGNAL(stateChanged(int)), this, SLOT(updateStatistics()));
	// Graph view
	connect(ui_->checkBox_spanAllMaps, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_ignorePoseCorrection, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_ignoreGlobalLoop, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_ignoreLocalLoopSpace, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_ignoreLocalLoopTime, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_ignoreUserLoop, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->spinBox_optimizationDepth, SIGNAL(valueChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_gridErode, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->checkBox_octomap, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_gainCompensationRadius, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_voxelSize, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_gridCellSize, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->groupBox_posefiltering, SIGNAL(clicked(bool)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_posefilteringRadius, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_posefilteringAngle, SIGNAL(valueChanged(double)), this, SLOT(configModified()));

	connect(ui_->spinBox_icp_decimation, SIGNAL(valueChanged(int)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_icp_maxDepth, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_icp_minDepth, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->checkBox_icp_from_depth, SIGNAL(stateChanged(int)), this, SLOT(configModified()));
	
	connect(ui_->doubleSpinBox_detectMore_radius, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->doubleSpinBox_detectMore_angle, SIGNAL(valueChanged(double)), this, SLOT(configModified()));
	connect(ui_->spinBox_detectMore_iterations, SIGNAL(valueChanged(int)), this, SLOT(configModified()));

	connect(exportDialog_, SIGNAL(configChanged()), this, SLOT(configModified()));

	// dockwidget
	QList<QDockWidget*> dockWidgets = this->findChildren<QDockWidget*>();
	for(int i=0; i<dockWidgets.size(); ++i)
	{
		connect(dockWidgets[i], SIGNAL(dockLocationChanged(Qt::DockWidgetArea)), this, SLOT(configModified()));
		connect(dockWidgets[i]->toggleViewAction(), SIGNAL(toggled(bool)), this, SLOT(configModified()));
	}
	ui_->dockWidget_constraints->installEventFilter(this);
	ui_->dockWidget_graphView->installEventFilter(this);
	ui_->dockWidget_occupancyGridView->installEventFilter(this);
	ui_->dockWidget_stereoView->installEventFilter(this);
	ui_->dockWidget_view3d->installEventFilter(this);
	ui_->dockWidget_guiparameters->installEventFilter(this);
	ui_->dockWidget_coreparameters->installEventFilter(this);
	ui_->dockWidget_info->installEventFilter(this);
	ui_->dockWidget_statistics->installEventFilter(this);
}

DatabaseViewer::~DatabaseViewer()
{
	delete ui_;
	if(dbDriver_)
	{
		delete dbDriver_;
	}
#ifdef RTABMAP_OCTOMAP
	if(octomap_)
	{
		delete octomap_;
	}
#endif
}

void DatabaseViewer::setupMainLayout(bool vertical)
{
	if(vertical)
	{
		qobject_cast<QHBoxLayout *>(ui_->horizontalLayout_imageViews->layout())->setDirection(QBoxLayout::TopToBottom);
	}
	else if(!vertical)
	{
		qobject_cast<QHBoxLayout *>(ui_->horizontalLayout_imageViews->layout())->setDirection(QBoxLayout::LeftToRight);
	}
	if(ids_.size())
	{
		sliderAValueChanged(ui_->horizontalSlider_A->value()); // update matching lines
	}
}

void DatabaseViewer::showCloseButton(bool visible)
{
	ui_->buttonBox->setVisible(visible);
}

void DatabaseViewer::configModified()
{
	this->setWindowModified(true);
}

QString DatabaseViewer::getIniFilePath() const
{
	if(!iniFilePath_.isEmpty())
	{
		return iniFilePath_;
	}
	QString privatePath = QDir::homePath() + "/.rtabmap";
	if(!QDir(privatePath).exists())
	{
		QDir::home().mkdir(".rtabmap");
	}
	return privatePath + "/rtabmap.ini";
}

void DatabaseViewer::readSettings()
{
	QString path = getIniFilePath();
	QSettings settings(path, QSettings::IniFormat);
	settings.beginGroup("DatabaseViewer");

	//load window state / geometry
	QByteArray bytes;
	bytes = settings.value("geometry", QByteArray()).toByteArray();
	if(!bytes.isEmpty())
	{
		this->restoreGeometry(bytes);
	}
	bytes = settings.value("state", QByteArray()).toByteArray();
	if(!bytes.isEmpty())
	{
		this->restoreState(bytes);
	}
	savedMaximized_ = settings.value("maximized", false).toBool();

	ui_->comboBox_logger_level->setCurrentIndex(settings.value("loggerLevel", ui_->comboBox_logger_level->currentIndex()).toInt());
	ui_->actionVertical_Layout->setChecked(settings.value("verticalLayout", ui_->actionVertical_Layout->isChecked()).toBool());
	ui_->checkBox_alignPosesWithGroundTruth->setChecked(settings.value("alignGroundTruth", ui_->checkBox_alignPosesWithGroundTruth->isChecked()).toBool());
	ui_->checkBox_timeStats->setChecked(settings.value("timeStats", ui_->checkBox_timeStats->isChecked()).toBool());

	// GraphViewer settings
	ui_->graphViewer->loadSettings(settings, "GraphView");

	settings.beginGroup("optimization");
	ui_->checkBox_spanAllMaps->setChecked(settings.value("spanToAllMaps", ui_->checkBox_spanAllMaps->isChecked()).toBool());
	ui_->checkBox_ignorePoseCorrection->setChecked(settings.value("ignorePoseCorrection", ui_->checkBox_ignorePoseCorrection->isChecked()).toBool());
	ui_->checkBox_ignoreGlobalLoop->setChecked(settings.value("ignoreGlobalLoop", ui_->checkBox_ignoreGlobalLoop->isChecked()).toBool());
	ui_->checkBox_ignoreLocalLoopSpace->setChecked(settings.value("ignoreLocalLoopSpace", ui_->checkBox_ignoreLocalLoopSpace->isChecked()).toBool());
	ui_->checkBox_ignoreLocalLoopTime->setChecked(settings.value("ignoreLocalLoopTime", ui_->checkBox_ignoreLocalLoopTime->isChecked()).toBool());
	ui_->checkBox_ignoreUserLoop->setChecked(settings.value("ignoreUserLoop", ui_->checkBox_ignoreUserLoop->isChecked()).toBool());
	ui_->spinBox_optimizationDepth->setValue(settings.value("depth", ui_->spinBox_optimizationDepth->value()).toInt());
	ui_->doubleSpinBox_gainCompensationRadius->setValue(settings.value("gainCompensationRadius", ui_->doubleSpinBox_gainCompensationRadius->value()).toDouble());
	ui_->doubleSpinBox_voxelSize->setValue(settings.value("voxelSize", ui_->doubleSpinBox_voxelSize->value()).toDouble());

	settings.endGroup();

	settings.beginGroup("grid");
	ui_->doubleSpinBox_gridCellSize->setValue(settings.value("gridCellSize", ui_->doubleSpinBox_gridCellSize->value()).toDouble());
	ui_->groupBox_posefiltering->setChecked(settings.value("poseFiltering", ui_->groupBox_posefiltering->isChecked()).toBool());
	ui_->doubleSpinBox_posefilteringRadius->setValue(settings.value("poseFilteringRadius", ui_->doubleSpinBox_posefilteringRadius->value()).toDouble());
	ui_->doubleSpinBox_posefilteringAngle->setValue(settings.value("poseFilteringAngle", ui_->doubleSpinBox_posefilteringAngle->value()).toDouble());
	ui_->checkBox_gridErode->setChecked(settings.value("erode", ui_->checkBox_gridErode->isChecked()).toBool());
	if(ui_->checkBox_octomap->isEnabled())
	{
		ui_->checkBox_octomap->setChecked(settings.value("octomap", ui_->checkBox_octomap->isChecked()).toBool());
	}
	settings.endGroup();

	settings.beginGroup("mesh");
	ui_->checkBox_mesh_quad->setChecked(settings.value("quad", ui_->checkBox_mesh_quad->isChecked()).toBool());
	ui_->spinBox_mesh_angleTolerance->setValue(settings.value("angleTolerance", ui_->spinBox_mesh_angleTolerance->value()).toInt());
	ui_->spinBox_mesh_minClusterSize->setValue(settings.value("minClusterSize", ui_->spinBox_mesh_minClusterSize->value()).toInt());
	ui_->spinBox_mesh_fillDepthHoles->setValue(settings.value("fillDepthHolesSize", ui_->spinBox_mesh_fillDepthHoles->value()).toInt());
	ui_->spinBox_mesh_depthError->setValue(settings.value("fillDepthHolesError", ui_->spinBox_mesh_depthError->value()).toInt());
	ui_->spinBox_mesh_triangleSize->setValue(settings.value("triangleSize", ui_->spinBox_mesh_triangleSize->value()).toInt());
	settings.endGroup();

	// ImageViews
	//ui_->graphicsView_A->loadSettings(settings, "ImageViewA");
	//ui_->graphicsView_B->loadSettings(settings, "ImageViewB");

	// ICP parameters
	settings.beginGroup("icp");
	ui_->spinBox_icp_decimation->setValue(settings.value("decimation", ui_->spinBox_icp_decimation->value()).toInt());
	ui_->doubleSpinBox_icp_maxDepth->setValue(settings.value("maxDepth", ui_->doubleSpinBox_icp_maxDepth->value()).toDouble());
	ui_->doubleSpinBox_icp_minDepth->setValue(settings.value("minDepth", ui_->doubleSpinBox_icp_minDepth->value()).toDouble());
	ui_->checkBox_icp_from_depth->setChecked(settings.value("icpFromDepth", ui_->checkBox_icp_from_depth->isChecked()).toBool());
	settings.endGroup();

	settings.endGroup(); // DatabaseViewer

	// Use same parameters used by RTAB-Map
	settings.beginGroup("Gui");
	exportDialog_->loadSettings(settings, exportDialog_->objectName());
	settings.beginGroup("PostProcessingDialog");
	ui_->doubleSpinBox_detectMore_radius->setValue(settings.value("cluster_radius", ui_->doubleSpinBox_detectMore_radius->value()).toDouble());
	ui_->doubleSpinBox_detectMore_angle->setValue(settings.value("cluster_angle", ui_->doubleSpinBox_detectMore_angle->value()).toDouble());
	ui_->spinBox_detectMore_iterations->setValue(settings.value("iterations", ui_->spinBox_detectMore_iterations->value()).toInt());
	settings.endGroup();
	settings.endGroup();


	ParametersMap parameters;
	Parameters::readINI(path.toStdString(), parameters);
	for(ParametersMap::iterator iter = parameters.begin(); iter!= parameters.end(); ++iter)
	{
		ui_->parameters_toolbox->updateParameter(iter->first, iter->second);
	}
}

void DatabaseViewer::writeSettings()
{
	QString path = getIniFilePath();
	QSettings settings(path, QSettings::IniFormat);
	settings.beginGroup("DatabaseViewer");

	//save window state / geometry
	if(!this->isMaximized())
	{
		settings.setValue("geometry", this->saveGeometry());
	}
	settings.setValue("state", this->saveState());
	settings.setValue("maximized", this->isMaximized());
	savedMaximized_ = this->isMaximized();

	settings.setValue("loggerLevel", ui_->comboBox_logger_level->currentIndex());
	settings.setValue("verticalLayout", ui_->actionVertical_Layout->isChecked());
	settings.setValue("alignGroundTruth", ui_->checkBox_alignPosesWithGroundTruth->isChecked());
	settings.setValue("timeStats", ui_->checkBox_timeStats->isChecked());

	// save GraphViewer settings
	ui_->graphViewer->saveSettings(settings, "GraphView");

	// save optimization settings
	settings.beginGroup("optimization");
	//settings.setValue("iterations", ui_->spinBox_iterations->value());
	settings.setValue("spanToAllMaps", ui_->checkBox_spanAllMaps->isChecked());
	//settings.setValue("robust", ui_->checkBox_robust->isChecked());
	settings.setValue("ignorePoseCorrection", ui_->checkBox_ignorePoseCorrection->isChecked());
	settings.setValue("ignoreGlobalLoop", ui_->checkBox_ignoreGlobalLoop->isChecked());
	settings.setValue("ignoreLocalLoopSpace", ui_->checkBox_ignoreLocalLoopSpace->isChecked());
	settings.setValue("ignoreLocalLoopTime", ui_->checkBox_ignoreLocalLoopTime->isChecked());
	settings.setValue("ignoreUserLoop", ui_->checkBox_ignoreUserLoop->isChecked());
	//settings.setValue("strategy", ui_->comboBox_graphOptimizer->currentIndex());
	//settings.setValue("slam2d", ui_->checkBox_2dslam->isChecked());
	settings.setValue("depth", ui_->spinBox_optimizationDepth->value());
	settings.setValue("gainCompensationRadius", ui_->doubleSpinBox_gainCompensationRadius->value());
	settings.setValue("voxelSize", ui_->doubleSpinBox_voxelSize->value());
	settings.endGroup();

	// save Grid settings
	settings.beginGroup("grid");
	settings.setValue("gridCellSize", ui_->doubleSpinBox_gridCellSize->value());
	settings.setValue("poseFiltering", ui_->groupBox_posefiltering->isChecked());
	settings.setValue("poseFilteringRadius", ui_->doubleSpinBox_posefilteringRadius->value());
	settings.setValue("poseFilteringAngle", ui_->doubleSpinBox_posefilteringAngle->value());
	settings.setValue("erode", ui_->checkBox_gridErode->isChecked());
	settings.setValue("octomap", ui_->checkBox_octomap->isChecked());
	settings.endGroup();

	settings.beginGroup("mesh");
	settings.setValue("quad", ui_->checkBox_mesh_quad->isChecked());
	settings.setValue("angleTolerance", ui_->spinBox_mesh_angleTolerance->value());
	settings.setValue("minClusterSize", ui_->spinBox_mesh_minClusterSize->value());
	settings.setValue("fillDepthHolesSize", ui_->spinBox_mesh_fillDepthHoles->value());
	settings.setValue("fillDepthHolesError", ui_->spinBox_mesh_depthError->value());
	settings.setValue("triangleSize", ui_->spinBox_mesh_triangleSize->value());
	settings.endGroup();

	// ImageViews
	//ui_->graphicsView_A->saveSettings(settings, "ImageViewA");
	//ui_->graphicsView_B->saveSettings(settings, "ImageViewB");

	// save ICP parameters
	settings.beginGroup("icp");
	settings.setValue("decimation", ui_->spinBox_icp_decimation->value());
	settings.setValue("maxDepth", ui_->doubleSpinBox_icp_maxDepth->value());
	settings.setValue("minDepth", ui_->doubleSpinBox_icp_minDepth->value());
	settings.setValue("icpFromDepth", ui_->checkBox_icp_from_depth->isChecked());
	settings.endGroup();
	
	settings.endGroup(); // DatabaseViewer

	// Use same parameters used by RTAB-Map
	settings.beginGroup("Gui");
	exportDialog_->saveSettings(settings, exportDialog_->objectName());
	settings.beginGroup("PostProcessingDialog");
	settings.setValue("cluster_radius",  ui_->doubleSpinBox_detectMore_radius->value());
	settings.setValue("cluster_angle", ui_->doubleSpinBox_detectMore_angle->value());
	settings.setValue("iterations", ui_->spinBox_detectMore_iterations->value());
	settings.endGroup();
	settings.endGroup();

	ParametersMap parameters = ui_->parameters_toolbox->getParameters();
	for(ParametersMap::iterator iter=parameters.begin(); iter!=parameters.end();)
	{
		if(!ui_->parameters_toolbox->getParameterWidget(iter->first.c_str()))
		{
			parameters.erase(iter++);
		}
		else
		{
			++iter;
		}
	}
	Parameters::writeINI(path.toStdString(), parameters);

	this->setWindowModified(false);
}

void DatabaseViewer::restoreDefaultSettings()
{
	// reset GUI parameters
	ui_->comboBox_logger_level->setCurrentIndex(1);
	ui_->checkBox_alignPosesWithGroundTruth->setChecked(true);
	ui_->checkBox_timeStats->setChecked(true);

	ui_->checkBox_spanAllMaps->setChecked(true);
	ui_->checkBox_ignorePoseCorrection->setChecked(false);
	ui_->checkBox_ignoreGlobalLoop->setChecked(false);
	ui_->checkBox_ignoreLocalLoopSpace->setChecked(false);
	ui_->checkBox_ignoreLocalLoopTime->setChecked(false);
	ui_->checkBox_ignoreUserLoop->setChecked(false);
	ui_->spinBox_optimizationDepth->setValue(0);
	ui_->doubleSpinBox_gainCompensationRadius->setValue(0.0);
	ui_->doubleSpinBox_voxelSize->setValue(0.0);

	ui_->doubleSpinBox_gridCellSize->setValue(0.05);
	ui_->groupBox_posefiltering->setChecked(false);
	ui_->doubleSpinBox_posefilteringRadius->setValue(0.1);
	ui_->doubleSpinBox_posefilteringAngle->setValue(30);
	ui_->checkBox_gridErode->setChecked(false);
	ui_->checkBox_octomap->setChecked(false);

	ui_->checkBox_mesh_quad->setChecked(true);
	ui_->spinBox_mesh_angleTolerance->setValue(15);
	ui_->spinBox_mesh_minClusterSize->setValue(0);
	ui_->spinBox_mesh_fillDepthHoles->setValue(false);
	ui_->spinBox_mesh_depthError->setValue(10);
	ui_->spinBox_mesh_triangleSize->setValue(2);

	ui_->spinBox_icp_decimation->setValue(1);
	ui_->doubleSpinBox_icp_maxDepth->setValue(0.0);
	ui_->doubleSpinBox_icp_minDepth->setValue(0.0);
	ui_->checkBox_icp_from_depth->setChecked(false);

	ui_->doubleSpinBox_detectMore_radius->setValue(1.0);
	ui_->doubleSpinBox_detectMore_angle->setValue(30.0);
	ui_->spinBox_detectMore_iterations->setValue(5);
}

void DatabaseViewer::openDatabase()
{
	QString path = QFileDialog::getOpenFileName(this, tr("Select file"), pathDatabase_, tr("Databases (*.db)"));
	if(!path.isEmpty())
	{
		openDatabase(path);
	}
}

bool DatabaseViewer::openDatabase(const QString & path)
{
	UDEBUG("Open database \"%s\"", path.toStdString().c_str());
	if(QFile::exists(path))
	{
		if(dbDriver_)
		{
			delete dbDriver_;
			dbDriver_ = 0;
			ids_.clear();
			idToIndex_.clear();
			neighborLinks_.clear();
			loopLinks_.clear();
			graphes_.clear();
			graphLinks_.clear();
			poses_.clear();
			groundTruthPoses_.clear();
			mapIds_.clear();
			links_.clear();
			linksAdded_.clear();
			linksRefined_.clear();
			linksRemoved_.clear();
			localMaps_.clear();
			localMapsInfo_.clear();
			generatedLocalMaps_.clear();
			generatedLocalMapsInfo_.clear();
			ui_->graphViewer->clearAll();
			occupancyGridViewer_->clear();
			ui_->menuExport_poses->setEnabled(false);
			ui_->checkBox_showOptimized->setEnabled(false);
			ui_->toolBox_statistics->clear();
			databaseFileName_.clear();
			ui_->checkBox_alignPosesWithGroundTruth->setVisible(false);
			ui_->label_alignPosesWithGroundTruth->setVisible(false);
		}

		std::string driverType = "sqlite3";

		dbDriver_ = DBDriver::create();

		if(!dbDriver_->openConnection(path.toStdString()))
		{
			QMessageBox::warning(this, "Database error", tr("Can't open database \"%1\"").arg(path));
		}
		else
		{
			pathDatabase_ = UDirectory::getDir(path.toStdString()).c_str();
			databaseFileName_ = UFile::getName(path.toStdString());
			ui_->graphViewer->setWorkingDirectory(pathDatabase_);

			// look if there are saved parameters
			ParametersMap parameters = dbDriver_->getLastParameters();

			if(parameters.size())
			{
				const ParametersMap & currentParameters = ui_->parameters_toolbox->getParameters();
				ParametersMap differentParameters;
				for(ParametersMap::iterator iter=parameters.begin(); iter!=parameters.end(); ++iter)
				{
					ParametersMap::const_iterator jter = currentParameters.find(iter->first);
					if(jter!=currentParameters.end() &&
					   ui_->parameters_toolbox->getParameterWidget(QString(iter->first.c_str())) != 0 &&
					   iter->second.compare(jter->second) != 0 &&
					   iter->first.compare(Parameters::kRtabmapWorkingDirectory()) != 0)
					{
						bool different = true;
						if(Parameters::getType(iter->first).compare("double") ==0 ||
						   Parameters::getType(iter->first).compare("float") == 0)
						{
							if(uStr2Double(iter->second) == uStr2Double(jter->second))
							{
								different = false;
							}
						}
						if(different)
						{
							differentParameters.insert(*iter);
							QString msg = tr("Parameter \"%1\": database=\"%2\" Preferences=\"%3\"")
									.arg(iter->first.c_str())
									.arg(iter->second.c_str())
									.arg(jter->second.c_str());
							UWARN(msg.toStdString().c_str());
						}
					}
				}

				if(differentParameters.size())
				{
					int r = QMessageBox::question(this,
							tr("Update parameters..."),
							tr("The database is using %1 different parameter(s) than "
							   "those currently set in Core parameters panel. Do you want "
							   "to use database's parameters?").arg(differentParameters.size()),
							QMessageBox::Yes | QMessageBox::No,
							QMessageBox::Yes);
					if(r == QMessageBox::Yes)
					{
						QStringList str;
						for(rtabmap::ParametersMap::const_iterator iter = differentParameters.begin(); iter!=differentParameters.end(); ++iter)
						{
							ui_->parameters_toolbox->updateParameter(iter->first, iter->second);
							str.push_back(iter->first.c_str());
						}
						notifyParametersChanged(str);
					}
				}
			}

			updateIds();
			return true;
		}
	}
	else
	{
		QMessageBox::warning(this, "Database error", tr("Database \"%1\" does not exist.").arg(path));
	}
	return false;
}

void DatabaseViewer::closeEvent(QCloseEvent* event)
{
	//write settings before quit?
	bool save = false;
	if(this->isWindowModified())
	{
		QMessageBox::Button b=QMessageBox::question(this,
				tr("Database Viewer"),
				tr("There are unsaved changed settings. Save them?"),
				QMessageBox::Save | QMessageBox::Cancel | QMessageBox::Discard);
		if(b == QMessageBox::Save)
		{
			save = true;
		}
		else if(b != QMessageBox::Discard)
		{
			event->ignore();
			return;
		}
	}

	if(save)
	{
		writeSettings();
	}

	event->accept();
	if(dbDriver_)
	{
		if(linksAdded_.size() || linksRefined_.size() || linksRemoved_.size())
		{
			QMessageBox::StandardButton button = QMessageBox::question(this,
					tr("Links modified"),
					tr("Some links are modified (%1 added, %2 refined, %3 removed), do you want to save them?")
					.arg(linksAdded_.size()).arg(linksRefined_.size()).arg(linksRemoved_.size()),
					QMessageBox::Cancel | QMessageBox::Yes | QMessageBox::No,
					QMessageBox::Cancel);

			if(button == QMessageBox::Yes)
			{
				// Added links
				for(std::multimap<int, rtabmap::Link>::iterator iter=linksAdded_.begin(); iter!=linksAdded_.end(); ++iter)
				{
					std::multimap<int, rtabmap::Link>::iterator refinedIter = rtabmap::graph::findLink(linksRefined_, iter->second.from(), iter->second.to());
					if(refinedIter != linksRefined_.end())
					{
						dbDriver_->addLink(refinedIter->second);
						dbDriver_->addLink(refinedIter->second.inverse());
					}
					else
					{
						dbDriver_->addLink(iter->second);
						dbDriver_->addLink(iter->second.inverse());
					}
				}

				//Refined links
				for(std::multimap<int, rtabmap::Link>::iterator iter=linksRefined_.begin(); iter!=linksRefined_.end(); ++iter)
				{
					if(!containsLink(linksAdded_, iter->second.from(), iter->second.to()))
					{
						dbDriver_->updateLink(iter->second);
						dbDriver_->updateLink(iter->second.inverse());
					}
				}

				// Rejected links
				for(std::multimap<int, rtabmap::Link>::iterator iter=linksRemoved_.begin(); iter!=linksRemoved_.end(); ++iter)
				{
					dbDriver_->removeLink(iter->second.to(), iter->second.from());
					dbDriver_->removeLink(iter->second.from(), iter->second.to());
				}
				linksAdded_.clear();
				linksRefined_.clear();
				linksRemoved_.clear();
			}

			if(button != QMessageBox::Yes && button != QMessageBox::No)
			{
				event->ignore();
			}
		}

		if(event->isAccepted() &&
			generatedLocalMaps_.size() &&
			uStrNumCmp(dbDriver_->getDatabaseVersion(), "0.11.10") >= 0)
		{
			QMessageBox::StandardButton button = QMessageBox::question(this,
					tr("Local occupancy grid maps modified"),
					tr("%1 occupancy grid maps are modified, do you want to "
						"save them? This will overwrite occupancy grids saved in the database.")
					.arg(generatedLocalMaps_.size()),
					QMessageBox::Cancel | QMessageBox::Yes | QMessageBox::No,
					QMessageBox::Cancel);

			if(button == QMessageBox::Yes)
			{
				// Rejected links
				UASSERT(generatedLocalMaps_.size() == generatedLocalMapsInfo_.size());
				std::map<int, std::pair<cv::Mat, cv::Mat> >::iterator mapIter = generatedLocalMaps_.begin();
				std::map<int, std::pair<float, cv::Point3f> >::iterator infoIter = generatedLocalMapsInfo_.begin();
				for(; mapIter!=generatedLocalMaps_.end(); ++mapIter, ++infoIter)
				{
					UASSERT(mapIter->first == infoIter->first);
					dbDriver_->updateOccupancyGrid(
							mapIter->first,
							mapIter->second.first,
							mapIter->second.second,
							infoIter->second.first,
							infoIter->second.second);
				}
				generatedLocalMaps_.clear();
				generatedLocalMapsInfo_.clear();
				localMaps_.clear();
				localMapsInfo_.clear();
			}

			if(button != QMessageBox::Yes && button != QMessageBox::No)
			{
				event->ignore();
			}
		}
	}

	if(event->isAccepted())
	{
		ui_->toolBox_statistics->closeFigures();
		if(dbDriver_)
		{
			delete dbDriver_;
			dbDriver_ = 0;
		}
	}
}

void DatabaseViewer::showEvent(QShowEvent* anEvent)
{
	this->setWindowModified(false);

	if((ui_->graphViewer->isVisible() || ui_->dockWidget_occupancyGridView->isVisible()) && graphes_.size() && localMaps_.size()==0)
	{
		sliderIterationsValueChanged((int)graphes_.size()-1);
	}
}

void DatabaseViewer::moveEvent(QMoveEvent* anEvent)
{
	if(this->isVisible())
	{
		// HACK, there is a move event when the window is shown the first time.
		if(!firstCall_)
		{
			this->configModified();
		}
		firstCall_ = false;
	}
}

void DatabaseViewer::resizeEvent(QResizeEvent* anEvent)
{
	if(this->isVisible())
	{
		this->configModified();
	}
}

void DatabaseViewer::keyPressEvent(QKeyEvent *event)
{
	//catch ctrl-s to save settings
	if((event->modifiers() & Qt::ControlModifier) && event->key() == Qt::Key_S)
	{
		this->writeSettings();
	}
}

bool DatabaseViewer::eventFilter(QObject *obj, QEvent *event)
{
	if (event->type() == QEvent::Resize && qobject_cast<QDockWidget*>(obj))
	{
		this->setWindowModified(true);
	}
	return QWidget::eventFilter(obj, event);
}


void DatabaseViewer::exportDatabase()
{
	if(!dbDriver_ || ids_.size() == 0)
	{
		return;
	}

	rtabmap::ExportDialog dialog;

	if(dialog.exec())
	{
		if(!dialog.outputPath().isEmpty())
		{
			int framesIgnored = dialog.framesIgnored();
			double frameRate = dialog.targetFramerate();
			int sessionExported = dialog.sessionExported();
			QString path = dialog.outputPath();
			rtabmap::DataRecorder recorder;
			QList<int> ids;

			double previousStamp = 0;
			std::vector<double> delays(ids_.size());
			int oi=0;
			std::map<int, Transform> poses;
			std::map<int, double> stamps;
			std::map<int, Transform> groundTruths;
			for(int i=0; i<ids_.size(); i+=1+framesIgnored)
			{
				Transform odomPose, groundTruth;
				int weight = -1;
				int mapId = -1;
				std::string label;
				double stamp = 0;
				std::vector<float> velocity;
				if(dbDriver_->getNodeInfo(ids_[i], odomPose, mapId, weight, label, stamp, groundTruth, velocity))
				{
					if(frameRate == 0 ||
					   previousStamp == 0 ||
					   stamp == 0 ||
					   stamp - previousStamp >= 1.0/frameRate)
					{
						if(sessionExported < 0 || sessionExported == mapId)
						{
							ids.push_back(ids_[i]);

							if(previousStamp && stamp)
							{
								delays[oi++] = stamp - previousStamp;
							}
							previousStamp = stamp;

							poses.insert(std::make_pair(ids_[i], odomPose));
							stamps.insert(std::make_pair(ids_[i], stamp));
							groundTruths.insert(std::make_pair(ids_[i], groundTruth));
						}
					}
					if(sessionExported >= 0 && mapId > sessionExported)
					{
						break;
					}
				}
			}
			delays.resize(oi);

			if(recorder.init(path, false))
			{
				rtabmap::ProgressDialog * progressDialog = new rtabmap::ProgressDialog(this);
				progressDialog->setAttribute(Qt::WA_DeleteOnClose);
				progressDialog->setMaximumSteps(ids.size());
				progressDialog->show();
				progressDialog->setCancelButtonVisible(true);
				UINFO("Decompress: rgb=%d depth=%d scan=%d userData=%d",
						dialog.isRgbExported()?1:0,
						dialog.isDepthExported()?1:0,
						dialog.isDepth2dExported()?1:0,
						dialog.isUserDataExported()?1:0);

				for(int i=0; i<ids.size() && !progressDialog->isCanceled(); ++i)
				{
					int id = ids.at(i);

					SensorData data;
					dbDriver_->getNodeData(id, data);
					cv::Mat depth, rgb, scan, userData;
					data.uncompressDataConst(
							!dialog.isRgbExported()?0:&rgb,
							!dialog.isDepthExported()?0:&depth,
							!dialog.isDepth2dExported()?0:&scan,
							!dialog.isUserDataExported()?0:&userData);
					cv::Mat covariance = cv::Mat::eye(6,6,CV_64FC1);
					if(dialog.isOdomExported())
					{
						std::map<int, Link> links;
						dbDriver_->loadLinks(id, links, Link::kNeighbor);
						if(links.size() && links.begin()->first < id)
						{
							covariance = links.begin()->second.infMatrix().inv();
						}
					}

					rtabmap::SensorData sensorData;
					if(data.cameraModels().size())
					{
						sensorData = rtabmap::SensorData(
							scan,
							LaserScanInfo(dialog.isDepth2dExported()?data.laserScanInfo().maxPoints():0,
										  dialog.isDepth2dExported()?data.laserScanInfo().maxRange():0,
										  dialog.isDepth2dExported()?data.laserScanInfo().localTransform():Transform::getIdentity()),
							rgb,
							depth,
							data.cameraModels(),
							id,
							stamps.at(id),
							userData);
					}
					else
					{
						sensorData = rtabmap::SensorData(
							scan,
							LaserScanInfo(dialog.isDepth2dExported()?data.laserScanInfo().maxPoints():0,
										  dialog.isDepth2dExported()?data.laserScanInfo().maxRange():0,
										  dialog.isDepth2dExported()?data.laserScanInfo().localTransform():Transform::getIdentity()),
							rgb,
							depth,
							data.stereoCameraModel(),
							id,
							stamps.at(id),
							userData);
					}
					sensorData.setGroundTruth(groundTruths.at(id));

					recorder.addData(sensorData, dialog.isOdomExported()?poses.at(id):Transform(), covariance);

					progressDialog->appendText(tr("Exported node %1").arg(id));
					progressDialog->incrementStep();
					QApplication::processEvents();
				}
				progressDialog->setValue(progressDialog->maximumSteps());
				if(delays.size())
				{
					progressDialog->appendText(tr("Average frame rate=%1 Hz (Min=%2, Max=%3)")
							.arg(1.0/uMean(delays)).arg(1.0/uMax(delays)).arg(1.0/uMin(delays)));
				}
				progressDialog->appendText(tr("Export finished to \"%1\"!").arg(path));
			}
			else
			{
				UERROR("DataRecorder init failed?!");
			}
		}
		else
		{
			QMessageBox::warning(this, tr("Cannot export database"), tr("An output path must be set!"));
		}
	}
}

void DatabaseViewer::extractImages()
{
	if(!dbDriver_ || ids_.size() == 0)
	{
		return;
	}

	QStringList formats;
	formats.push_back("jpg");
	formats.push_back("png");
	bool ok;
	QString ext = QInputDialog::getItem(this, tr("Which RGB format?"), tr("Format:"), formats, 0, false, &ok);
	if(!ok)
	{
		return;
	}

	QString path = QFileDialog::getExistingDirectory(this, tr("Select directory where to save images..."), QDir::homePath());
	if(!path.isEmpty())
	{
		if(ids_.size())
		{
			int id = ids_.at(0);
			SensorData data;
			dbDriver_->getNodeData(id, data);
			data.uncompressData();
			if(!data.imageRaw().empty() && !data.rightRaw().empty())
			{
				QDir dir;
				dir.mkdir(QString("%1/left").arg(path));
				dir.mkdir(QString("%1/right").arg(path));
				if(databaseFileName_.empty())
				{
					UERROR("Cannot save calibration file, database name is empty!");
				}
				else if(data.stereoCameraModel().isValidForProjection())
				{
					std::string cameraName = uSplit(databaseFileName_, '.').front();
					StereoCameraModel model(
							cameraName,
							data.imageRaw().size(),
							data.stereoCameraModel().left().K(),
							data.stereoCameraModel().left().D(),
							data.stereoCameraModel().left().R(),
							data.stereoCameraModel().left().P(),
							data.rightRaw().size(),
							data.stereoCameraModel().right().K(),
							data.stereoCameraModel().right().D(),
							data.stereoCameraModel().right().R(),
							data.stereoCameraModel().right().P(),
							data.stereoCameraModel().R(),
							data.stereoCameraModel().T(),
							data.stereoCameraModel().E(),
							data.stereoCameraModel().F(),
							data.stereoCameraModel().left().localTransform());
					if(model.save(path.toStdString()))
					{
						UINFO("Saved stereo calibration \"%s\"", (path.toStdString()+"/"+cameraName).c_str());
					}
					else
					{
						UERROR("Failed saving calibration \"%s\"", (path.toStdString()+"/"+cameraName).c_str());
					}
				}
			}
			else if(!data.imageRaw().empty())
			{
				if(!data.depthRaw().empty())
				{
					QDir dir;
					dir.mkdir(QString("%1/rgb").arg(path));
					dir.mkdir(QString("%1/depth").arg(path));
				}

				if(databaseFileName_.empty())
				{
					UERROR("Cannot save calibration file, database name is empty!");
				}
				else if(data.cameraModels().size() > 1)
				{
					UERROR("Only one camera calibration can be saved at this time (%d detected)", (int)data.cameraModels().size());
				}
				else if(data.cameraModels().size() == 1 && data.cameraModels().front().isValidForProjection())
				{
					std::string cameraName = uSplit(databaseFileName_, '.').front();
					CameraModel model(cameraName,
							data.imageRaw().size(),
							data.cameraModels().front().K(),
							data.cameraModels().front().D(),
							data.cameraModels().front().R(),
							data.cameraModels().front().P(),
							data.cameraModels().front().localTransform());
					if(model.save(path.toStdString()))
					{
						UINFO("Saved calibration \"%s\"", (path.toStdString()+"/"+cameraName).c_str());
					}
					else
					{
						UERROR("Failed saving calibration \"%s\"", (path.toStdString()+"/"+cameraName).c_str());
					}
				}
			}
		}

		int imagesExported = 0;
		for(int i=0; i<ids_.size(); ++i)
		{
			int id = ids_.at(i);
			SensorData data;
			dbDriver_->getNodeData(id, data);
			data.uncompressData();
			if(!data.imageRaw().empty() && !data.rightRaw().empty())
			{
				cv::imwrite(QString("%1/left/%2.%3").arg(path).arg(id).arg(ext).toStdString(), data.imageRaw());
				cv::imwrite(QString("%1/right/%2.%3").arg(path).arg(id).arg(ext).toStdString(), data.rightRaw());
				UINFO(QString("Saved left/%1.%2 and right/%1.%2").arg(id).arg(ext).toStdString().c_str());
				++imagesExported;
			}
			else if(!data.imageRaw().empty() && !data.depthRaw().empty())
			{
				cv::imwrite(QString("%1/rgb/%2.%3").arg(path).arg(id).arg(ext).toStdString(), data.imageRaw());
				cv::imwrite(QString("%1/depth/%2.png").arg(path).arg(id).toStdString(), data.depthRaw());
				UINFO(QString("Saved rgb/%1.%2 and depth/%1.png").arg(id).arg(ext).toStdString().c_str());
				++imagesExported;
			}
			else if(!data.imageRaw().empty())
			{
				cv::imwrite(QString("%1/%2.%3").arg(path).arg(id).arg(ext).toStdString(), data.imageRaw());
				UINFO(QString("Saved %1.%2").arg(id).arg(ext).toStdString().c_str());
				++imagesExported;
			}
		}
		QMessageBox::information(this, tr("Exporting"), tr("%1 images exported!").arg(imagesExported));
	}
}

void DatabaseViewer::updateIds()
{
	if(!dbDriver_)
	{
		return;
	}

	UINFO("Loading all IDs...");
	std::set<int> ids;
	dbDriver_->getAllNodeIds(ids);
	ids_ = QList<int>::fromStdList(std::list<int>(ids.begin(), ids.end()));
	idToIndex_.clear();
	mapIds_.clear();
	poses_.clear();
	groundTruthPoses_.clear();
	ui_->checkBox_alignPosesWithGroundTruth->setVisible(false);
	ui_->label_alignPosesWithGroundTruth->setVisible(false);
	links_.clear();
	linksAdded_.clear();
	linksRefined_.clear();
	linksRemoved_.clear();
	ui_->toolBox_statistics->clear();
	ui_->label_optimizeFrom->setText(tr("Optimize from"));
	std::multimap<int, Link> links;
	dbDriver_->getAllLinks(links, true);
	UDEBUG("%d total links loaded", (int)links.size());
	double totalOdom = 0.0;
	Transform previousPose;
	int sessions = ids_.size()?1:0;
	double totalTime = 0.0;
	double previousStamp = 0.0;
	std::set<int> idsWithoutBad;
	dbDriver_->getAllNodeIds(idsWithoutBad, false, true);
	int badcountInLTM = 0;
	int badCountInGraph = 0;
	bool hasReducedGraph = false;
	for(int i=0; i<ids_.size(); ++i)
	{
		idToIndex_.insert(ids_[i], i);

		Transform p, g;
		int w;
		std::string l;
		double s;
		int mapId;
		std::vector<float> v;
		dbDriver_->getNodeInfo(ids_[i], p, mapId, w, l, s, g, v);
		mapIds_.insert(std::make_pair(ids_[i], mapId));

		if(i>0)
		{
			if(mapIds_.at(ids_[i-1]) == mapId)
			{
				if(!p.isNull() && !previousPose.isNull())
				{
					totalOdom += p.getDistance(previousPose);
				}

				if(previousStamp > 0.0 && s > 0.0)
				{
					totalTime += s-previousStamp;
				}
			}
			else
			{
				++sessions;
			}
		}
		previousStamp=s;
		previousPose=p;

		//links
		bool addPose = false;
		for(std::multimap<int, Link>::iterator jter=links.find(ids_[i]); jter!=links.end() && jter->first == ids_[i]; ++jter)
		{
			if(jter->second.type() == Link::kNeighborMerged)
			{
				hasReducedGraph = true;
			}

			std::multimap<int, Link>::iterator invertedLinkIter = graph::findLink(links, jter->second.to(), jter->second.from(), false);
			if(	jter->second.isValid() && // null transform means a rehearsed location
				ids.find(jter->second.from()) != ids.end() &&
				ids.find(jter->second.to()) != ids.end() &&
				graph::findLink(links_, jter->second.from(), jter->second.to()) == links_.end() &&
				graph::findLink(links, jter->second.from(), jter->second.to(), false) != links.end() &&
				invertedLinkIter != links.end())
			{
				// check if user_data is set in opposite direction
				if(jter->second.userDataCompressed().cols == 0 &&
				   invertedLinkIter->second.userDataCompressed().cols != 0)
				{
					links_.insert(std::make_pair(invertedLinkIter->second.from(), invertedLinkIter->second));
				}
				else
				{
					links_.insert(std::make_pair(ids_[i], jter->second));
				}
				addPose = true;
			}
			else if(graph::findLink(links_, jter->second.from(), jter->second.to()) != links_.end())
			{
				addPose = true;
			}
		}
		if(addPose)
		{
			poses_.insert(std::make_pair(ids_[i], p));
			if(!g.isNull())
			{
				groundTruthPoses_.insert(std::make_pair(ids_[i], g));
			}
		}

		if(idsWithoutBad.find(ids_[i]) == idsWithoutBad.end())
		{
			++badcountInLTM;
			if(addPose)
			{
				++badCountInGraph;
			}
		}
	}
	if(!groundTruthPoses_.empty())
	{
		ui_->checkBox_alignPosesWithGroundTruth->setVisible(true);
		ui_->label_alignPosesWithGroundTruth->setVisible(true);
	}

	UINFO("Loaded %d ids, %d poses and %d links", (int)ids_.size(), (int)poses_.size(), (int)links_.size());

	if(ids_.size() && ui_->toolBox_statistics->isVisible())
	{
		UINFO("Update statistics...");
		updateStatistics();
	}

	UINFO("Update database info...");
	ui_->textEdit_info->clear();
	ui_->textEdit_info->append(tr("Version:\t\t%1").arg(dbDriver_->getDatabaseVersion().c_str()));
	ui_->textEdit_info->append(tr("Sessions:\t\t%1").arg(sessions));
	if(hasReducedGraph)
	{
		ui_->textEdit_info->append(tr("Total odometry length:\t%1 m (approx. as graph has been reduced)").arg(totalOdom));
	}
	else
	{
		ui_->textEdit_info->append(tr("Total odometry length:\t%1 m").arg(totalOdom));
	}
	ui_->textEdit_info->append(tr("Total time:\t\t%1").arg(QDateTime::fromMSecsSinceEpoch(totalTime*1000).toUTC().toString("hh:mm:ss.zzz")));
	ui_->textEdit_info->append(tr("LTM:\t\t%1 nodes and %2 words").arg(ids.size()).arg(dbDriver_->getTotalDictionarySize()));
	ui_->textEdit_info->append(tr("WM:\t\t%1 nodes and %2 words").arg(dbDriver_->getLastNodesSize()).arg(dbDriver_->getLastDictionarySize()));
	ui_->textEdit_info->append(tr("Global graph:\t%1 poses and %2 links").arg(poses_.size()).arg(links_.size()));
	ui_->textEdit_info->append(tr("Ground truth:\t%1 poses").arg(groundTruthPoses_.size()));
	ui_->textEdit_info->append("");
	long total = 0;
	long dbSize = UFile::length(dbDriver_->getUrl());
	long mem = dbSize;
	ui_->textEdit_info->append(tr("Database size:\t%1 %2").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes"));
	mem = dbDriver_->getNodesMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Nodes size:\t\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getLinksMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Links size:\t\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getImagesMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("RGB Images size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getDepthImagesMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Depth Images size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getCalibrationsMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Calibrations size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getGridsMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Grids size:\t\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getLaserScansMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Scans size:\t\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getUserDataMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("User data size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getWordsMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Dictionary size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getFeaturesMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Features size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbDriver_->getStatisticsMemoryUsed();
	total+=mem;
	ui_->textEdit_info->append(tr("Statistics size:\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	mem = dbSize - total;
	ui_->textEdit_info->append(tr("Other (indexing):\t%1 %2\t%3%").arg(mem>1000000?mem/1000000:mem>1000?mem/1000:mem).arg(mem>1000000?"MB":mem>1000?"KB":"Bytes").arg(dbSize>0?QString::number(double(mem)/double(dbSize)*100.0, 'f', 2 ):"0"));
	ui_->textEdit_info->append("");
	ui_->textEdit_info->append(tr("%1 bad signatures in LTM").arg(badcountInLTM));
	ui_->textEdit_info->append(tr("%1 bad signatures in the global graph").arg(badCountInGraph));
	ui_->textEdit_info->append("");
	ParametersMap parameters = dbDriver_->getLastParameters();
	QFontMetrics metrics(ui_->textEdit_info->font());
	int tabW = ui_->textEdit_info->tabStopWidth();
	for(ParametersMap::iterator iter=parameters.begin(); iter!=parameters.end(); ++iter)
	{
		int strW = metrics.width(QString(iter->first.c_str()) + "=");
		ui_->textEdit_info->append(tr("%1=%2%3")
				.arg(iter->first.c_str())
				.arg(strW < tabW?"\t\t\t\t":strW < tabW*2?"\t\t\t":strW < tabW*3?"\t\t":"\t")
				.arg(iter->second.c_str()));
	}

	// move back the cursor at the beginning
	ui_->textEdit_info->moveCursor(QTextCursor::Start) ;
	ui_->textEdit_info->ensureCursorVisible() ;

	if(ids.size())
	{
		if(poses_.size())
		{
			bool nullPoses = poses_.begin()->second.isNull();
			for(std::map<int,Transform>::iterator iter=poses_.begin(); iter!=poses_.end(); ++iter)
			{
				if((!iter->second.isNull() && nullPoses) ||
					(iter->second.isNull() && !nullPoses))
				{
					if(iter->second.isNull())
					{
						UWARN("Pose %d is null!", iter->first);
					}
					UWARN("Mixed valid and null poses! Ignoring graph...");
					poses_.clear();
					links_.clear();
					break;
				}
			}
			if(nullPoses)
			{
				poses_.clear();
				links_.clear();
			}

			if(poses_.size())
			{
				ui_->spinBox_optimizationsFrom->setRange(poses_.begin()->first, poses_.rbegin()->first);
				ui_->spinBox_optimizationsFrom->setValue(poses_.begin()->first);
				ui_->label_optimizeFrom->setText(tr("Optimize from [%1, %2]").arg(poses_.begin()->first).arg(poses_.rbegin()->first));
			}
		}
	}

	ui_->menuExport_poses->setEnabled(false);
	graphes_.clear();
	graphLinks_.clear();
	neighborLinks_.clear();
	loopLinks_.clear();
	for(std::multimap<int, rtabmap::Link>::iterator iter = links_.begin(); iter!=links_.end(); ++iter)
	{
		if(!iter->second.transform().isNull())
		{
			if(iter->second.type() == rtabmap::Link::kNeighbor ||
			   iter->second.type() == rtabmap::Link::kNeighborMerged)
			{
				neighborLinks_.append(iter->second);
			}
			else
			{
				loopLinks_.append(iter->second);
			}
		}
		else
		{
			UERROR("Transform null for link from %d to %d", iter->first, iter->second.to());
		}
	}

	if(ids_.size())
	{
		ui_->horizontalSlider_A->setMinimum(0);
		ui_->horizontalSlider_B->setMinimum(0);
		ui_->horizontalSlider_A->setMaximum(ids_.size()-1);
		ui_->horizontalSlider_B->setMaximum(ids_.size()-1);
		ui_->horizontalSlider_A->setEnabled(true);
		ui_->horizontalSlider_B->setEnabled(true);
		ui_->horizontalSlider_A->setSliderPosition(0);
		ui_->horizontalSlider_B->setSliderPosition(0);
		sliderAValueChanged(0);
		sliderBValueChanged(0);
	}
	else
	{
		ui_->horizontalSlider_A->setEnabled(false);
		ui_->horizontalSlider_B->setEnabled(false);
		ui_->label_idA->setText("NaN");
		ui_->label_idB->setText("NaN");
	}

	if(neighborLinks_.size())
	{
		ui_->horizontalSlider_neighbors->setMinimum(0);
		ui_->horizontalSlider_neighbors->setMaximum(neighborLinks_.size()-1);
		ui_->horizontalSlider_neighbors->setEnabled(true);
		ui_->horizontalSlider_neighbors->setSliderPosition(0);
	}
	else
	{
		ui_->horizontalSlider_neighbors->setEnabled(false);
	}

	if(ids_.size())
	{
		updateLoopClosuresSlider();
		if(ui_->graphViewer->isVisible() || ui_->dockWidget_occupancyGridView->isVisible())
		{
			updateGraphView();
		}
	}
}

void DatabaseViewer::updateStatistics()
{
	if(dbDriver_)
	{
		ui_->toolBox_statistics->clear();
		double firstStamp = 0.0;
		for(int i=0; i<ids_.size(); ++i)
		{
			double stamp=0.0;
			std::map<std::string, float> statistics = dbDriver_->getStatistics(ids_[i], stamp);
			if(firstStamp==0.0)
			{
				firstStamp = stamp;
			}
			for(std::map<std::string, float>::iterator iter=statistics.begin(); iter!=statistics.end(); ++iter)
			{
				ui_->toolBox_statistics->updateStat(iter->first.c_str(), ui_->checkBox_timeStats->isChecked()?float(stamp-firstStamp):ids_[i], iter->second, true);
			}
		}
	}
}

void DatabaseViewer::editDepthImage()
{
	if(dbDriver_ && ids_.size())
	{
		int id = ids_.at(ui_->horizontalSlider_A->value());
		SensorData data;
		dbDriver_->getNodeData(id, data, true, false, false, false);
		data.uncompressData();
		if(!data.depthRaw().empty())
		{
			editDepthArea_->setImage(data.depthRaw(), data.imageRaw());
			if(editDepthDialog_->exec() == QDialog::Accepted && editDepthArea_->isModified())
			{
				cv::Mat depth = editDepthArea_->getModifiedImage();
				UASSERT(data.depthRaw().type() == depth.type());
				UASSERT(data.depthRaw().cols == depth.cols);
				UASSERT(data.depthRaw().rows == depth.rows);
				dbDriver_->updateDepthImage(id, depth);
				this->update3dView();
			}
		}
	}
}

void DatabaseViewer::exportPosesRaw()
{
	exportPoses(0);
}
void DatabaseViewer::exportPosesRGBDSLAM()
{
	exportPoses(1);
}
void DatabaseViewer::exportPosesKITTI()
{
	exportPoses(2);
}
void DatabaseViewer::exportPosesTORO()
{
	exportPoses(3);
}
void DatabaseViewer::exportPosesG2O()
{
	exportPoses(4);
}

void DatabaseViewer::exportPoses(int format)
{
	if(graphes_.empty())
	{
		this->updateGraphView();
		if(graphes_.empty() || ui_->horizontalSlider_iterations->maximum() != (int)graphes_.size()-1)
		{
			QMessageBox::warning(this, tr("Cannot export poses"), tr("No graph in database?!"));
			return;
		}
	}

	std::map<int, Transform> optimizedPoses = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());

	if(optimizedPoses.size())
	{
		std::map<int, Transform> localTransforms;
		QStringList items;
		items.push_back("Robot");
		items.push_back("Camera");
		items.push_back("Scan");
		bool ok;
		QString item = QInputDialog::getItem(this, tr("Export Poses"), tr("Frame: "), items, 0, false, &ok);
		if(!ok || item.isEmpty())
		{
			return;
		}
		if(item.compare("Robot") != 0)
		{
			bool cameraFrame = item.compare("Camera") == 0;
			for(std::map<int, Transform>::iterator iter=optimizedPoses.begin(); iter!=optimizedPoses.end(); ++iter)
			{
				Transform localTransform;
				if(cameraFrame)
				{
					std::vector<CameraModel> models;
					StereoCameraModel stereoModel;
					if(dbDriver_->getCalibration(iter->first, models, stereoModel))
					{
						if((models.size() == 1 &&
							!models.at(0).localTransform().isNull()))
						{
							localTransform = models.at(0).localTransform();
						}
						else if(!stereoModel.localTransform().isNull())
						{
							localTransform = stereoModel.localTransform();
						}
						else if(models.size()>1)
						{
							UWARN("Multi-camera is not supported (node %d)", iter->first);
						}
						else
						{
							UWARN("Calibration not valid for node %d", iter->first);
						}
					}
					else
					{
						UWARN("Missing calibration for node %d", iter->first);
					}
				}
				else
				{
					LaserScanInfo info;
					if(dbDriver_->getLaserScanInfo(iter->first, info))
					{
						if(!info.localTransform().isNull())
						{
							localTransform = info.localTransform();
						}
						else
						{
							UWARN("Invalid scan info for node %d", iter->first);
						}
					}
					else
					{
						UWARN("Missing scan info for node %d", iter->first);
					}

				}
				if(!localTransform.isNull())
				{
					localTransforms.insert(std::make_pair(iter->first, localTransform));
				}
			}
			if(localTransforms.empty())
			{
				QMessageBox::warning(this,
						tr("Export Poses"),
						tr("Could not find any \"%1\" frame, exporting in Robot frame instead.").arg(item));
			}
		}

		std::map<int, Transform> poses;
		std::multimap<int, Link> links;
		if(localTransforms.empty())
		{
			poses = optimizedPoses;
			links = graphLinks_;
		}
		else
		{
			//adjust poses and links
			for(std::map<int, Transform>::iterator iter=localTransforms.begin(); iter!=localTransforms.end(); ++iter)
			{
				poses.insert(std::make_pair(iter->first, optimizedPoses.at(iter->first) * iter->second));
			}
			for(std::multimap<int, Link>::iterator iter=graphLinks_.begin(); iter!=graphLinks_.end(); ++iter)
			{
				if(uContains(poses, iter->second.from()) && uContains(poses, iter->second.to()))
				{
					std::multimap<int, Link>::iterator inserted = links.insert(*iter);
					int from = iter->second.from();
					int to = iter->second.to();
					inserted->second.setTransform(localTransforms.at(from).inverse()*iter->second.transform()*localTransforms.at(to));
				}
			}
		}

		std::map<int, double> stamps;
		if(format == 1)
		{
			for(std::map<int, Transform>::iterator iter=poses.begin(); iter!=poses.end(); ++iter)
			{
				Transform p, g;
				int w;
				std::string l;
				double stamp=0.0;
				int mapId;
				std::vector<float> v;
				if(dbDriver_->getNodeInfo(iter->first, p, mapId, w, l, stamp, g, v))
				{
					stamps.insert(std::make_pair(iter->first, stamp));
				}
			}
			if(stamps.size()!=poses.size())
			{
				QMessageBox::warning(this, tr("Export poses..."), tr("Poses (%1) and stamps (%2) have not the same size! Cannot export in RGB-D SLAM format.")
						.arg(poses.size()).arg(stamps.size()));
				return;
			}
		}

		QString output = pathDatabase_ + QDir::separator() + (format==3?"toro.graph":format==4?"poses.g2o":"poses.txt");

		QString path = QFileDialog::getSaveFileName(
				this,
				tr("Save File"),
				output,
				format == 3?tr("TORO file (*.graph)"):format==4?tr("g2o file (*.g2o)"):tr("Text file (*.txt)"));

		if(!path.isEmpty())
		{
			bool saved = graph::exportPoses(path.toStdString(), format, poses, links, stamps);

			if(saved)
			{
				QMessageBox::information(this,
						tr("Export poses..."),
						tr("%1 saved to \"%2\".")
						.arg(format == 3?"TORO graph":format == 4?"g2o graph":"Poses")
						.arg(path));
			}
			else
			{
				QMessageBox::information(this,
						tr("Export poses..."),
						tr("Failed to save %1 to \"%2\"!")
						.arg(format == 3?"TORO graph":format == 4?"g2o graph":"poses")
						.arg(path));
			}
		}
	}
}

void DatabaseViewer::generateGraph()
{
	if(!dbDriver_)
	{
		QMessageBox::warning(this, tr("Cannot generate a graph"), tr("A database must must loaded first...\nUse File->Open database."));
		return;
	}

	QString path = QFileDialog::getSaveFileName(this, tr("Save File"), pathDatabase_+"/Graph.dot", tr("Graphiz file (*.dot)"));
	if(!path.isEmpty())
	{
		dbDriver_->generateGraph(path.toStdString());
	}
}

void DatabaseViewer::generateLocalGraph()
{
	if(!ids_.size() || !dbDriver_)
	{
		QMessageBox::warning(this, tr("Cannot generate a graph"), tr("The database is empty..."));
		return;
	}
	bool ok = false;
	int id = QInputDialog::getInt(this, tr("Around which location?"), tr("Location ID"), ids_.first(), ids_.first(), ids_.last(), 1, &ok);

	if(ok)
	{
		int margin = QInputDialog::getInt(this, tr("Depth around the location?"), tr("Margin"), 4, 1, 100, 1, &ok);
		if(ok)
		{
			QString path = QFileDialog::getSaveFileName(this, tr("Save File"), pathDatabase_+"/Graph" + QString::number(id) + ".dot", tr("Graphiz file (*.dot)"));
			if(!path.isEmpty() && id>0)
			{
				std::map<int, int> ids;
				std::list<int> curentMarginList;
				std::set<int> currentMargin;
				std::set<int> nextMargin;
				nextMargin.insert(id);
				int m = 0;
				while((margin == 0 || m < margin) && nextMargin.size())
				{
					curentMarginList = std::list<int>(nextMargin.rbegin(), nextMargin.rend());
					nextMargin.clear();

					for(std::list<int>::iterator jter = curentMarginList.begin(); jter!=curentMarginList.end(); ++jter)
					{
						if(ids.find(*jter) == ids.end())
						{
							std::map<int, Link> links;
							ids.insert(std::pair<int, int>(*jter, m));

							UTimer timer;
							dbDriver_->loadLinks(*jter, links);

							// links
							for(std::map<int, Link>::const_iterator iter=links.begin(); iter!=links.end(); ++iter)
							{
								if( !uContains(ids, iter->first))
								{
									UASSERT(iter->second.type() != Link::kUndef);
									if(iter->second.type() == Link::kNeighbor ||
									   iter->second.type() == Link::kNeighborMerged)
									{
										nextMargin.insert(iter->first);
									}
									else
									{
										// loop closures are on same margin
										if(currentMargin.insert(iter->first).second)
										{
											curentMarginList.push_back(iter->first);
										}
									}
								}
							}
						}
					}
					++m;
				}

				if(ids.size() > 0)
				{
					ids.insert(std::pair<int,int>(id, 0));
					std::set<int> idsSet;
					for(std::map<int, int>::iterator iter = ids.begin(); iter!=ids.end(); ++iter)
					{
						idsSet.insert(idsSet.end(), iter->first);
						UINFO("Node %d", iter->first);
					}
					UINFO("idsSet=%d", idsSet.size());
					dbDriver_->generateGraph(path.toStdString(), idsSet);
				}
				else
				{
					QMessageBox::critical(this, tr("Error"), tr("No neighbors found for signature %1.").arg(id));
				}
			}
		}
	}
}

void DatabaseViewer::regenerateLocalMaps()
{
	OccupancyGrid grid(ui_->parameters_toolbox->getParameters());

	generatedLocalMaps_.clear();
	generatedLocalMapsInfo_.clear();

	rtabmap::ProgressDialog progressDialog(this);
	progressDialog.setMaximumSteps(ids_.size());
	progressDialog.show();
	progressDialog.setCancelButtonVisible(true);

	UPlot * plot = new UPlot(this);
	plot->setWindowFlags(Qt::Window);
	plot->setWindowTitle("Local Occupancy Grid Generation Time (ms)");
	plot->setAttribute(Qt::WA_DeleteOnClose);
	UPlotCurve * decompressionCurve = plot->addCurve("Decompression");
	UPlotCurve * gridCreationCurve = plot->addCurve("Grid Creation");
	plot->show();

	UPlot * plotCells = new UPlot(this);
	plotCells->setWindowFlags(Qt::Window);
	plotCells->setWindowTitle("Occupancy Cells");
	plotCells->setAttribute(Qt::WA_DeleteOnClose);
	UPlotCurve * totalCurve = plotCells->addCurve("Total");
	UPlotCurve * groundCurve = plotCells->addCurve("Empty");
	UPlotCurve * obstaclesCurve = plotCells->addCurve("Occupied");
	plotCells->show();

	double decompressionTime = 0;
	double gridCreationTime = 0;

	for(int i =0; i<ids_.size() && !progressDialog.isCanceled(); ++i)
	{
		UTimer timer;
		SensorData data;
		dbDriver_->getNodeData(ids_.at(i), data);
		data.uncompressData();
		decompressionTime = timer.ticks()*1000.0;

		int mapId, weight;
		Transform odomPose, groundTruth;
		std::string label;
		double stamp;
		QString msg;
		std::vector<float> velocity;
		if(dbDriver_->getNodeInfo(data.id(), odomPose, mapId, weight, label, stamp, groundTruth, velocity))
		{
			Signature s = data;
			s.setPose(odomPose);
			cv::Mat ground, obstacles;
			cv::Point3f viewpoint;
			timer.ticks();
			grid.createLocalMap(s, ground, obstacles, viewpoint);
			gridCreationTime = timer.ticks()*1000.0;
			uInsert(generatedLocalMaps_, std::make_pair(data.id(), std::make_pair(ground, obstacles)));
			uInsert(generatedLocalMapsInfo_, std::make_pair(data.id(), std::make_pair(grid.getCellSize(), viewpoint)));
			msg = QString("Generated local occupancy grid map %1/%2").arg(i+1).arg((int)ids_.size());

			totalCurve->addValue(ids_.at(i), obstacles.cols+ground.cols);
			groundCurve->addValue(ids_.at(i), ground.cols);
			obstaclesCurve->addValue(ids_.at(i), obstacles.cols);
		}

		progressDialog.appendText(msg);
		progressDialog.incrementStep();

		decompressionCurve->addValue(ids_.at(i), decompressionTime);
		gridCreationCurve->addValue(ids_.at(i), gridCreationTime);

		if(ids_.size() < 50 || (i+1) % 25 == 0)
		{
			QApplication::processEvents();
		}
	}
	progressDialog.setValue(progressDialog.maximumSteps());

	if(graphes_.size())
	{
		update3dView();
		sliderIterationsValueChanged((int)graphes_.size()-1);
	}
	else
	{
		updateGrid();
	}
}

void DatabaseViewer::regenerateCurrentLocalMaps()
{
	UTimer time;
	OccupancyGrid grid(ui_->parameters_toolbox->getParameters());

	if(ids_.size() == 0)
	{
		UWARN("ids_ is empty!");
		return;
	}

	QSet<int> idsSet;
	idsSet.insert(ids_.at(ui_->horizontalSlider_A->value()));
	idsSet.insert(ids_.at(ui_->horizontalSlider_B->value()));
	QList<int> ids = idsSet.toList();

	rtabmap::ProgressDialog progressDialog(this);
	progressDialog.setMaximumSteps(ids.size());
	progressDialog.show();

	for(int i =0; i<ids.size(); ++i)
	{
		generatedLocalMaps_.erase(ids.at(i));
		generatedLocalMapsInfo_.erase(ids.at(i));

		SensorData data;
		dbDriver_->getNodeData(ids.at(i), data);
		data.uncompressData();

		int mapId, weight;
		Transform odomPose, groundTruth;
		std::string label;
		double stamp;
		QString msg;
		std::vector<float> velocity;
		if(dbDriver_->getNodeInfo(data.id(), odomPose, mapId, weight, label, stamp, groundTruth, velocity))
		{
			Signature s = data;
			s.setPose(odomPose);
			cv::Mat ground, obstacles;
			cv::Point3f viewpoint;
			grid.createLocalMap(s, ground, obstacles, viewpoint);
			uInsert(generatedLocalMaps_, std::make_pair(data.id(), std::make_pair(ground, obstacles)));
			uInsert(generatedLocalMapsInfo_, std::make_pair(data.id(), std::make_pair(grid.getCellSize(), viewpoint)));
			msg = QString("Generated local occupancy grid map %1/%2 (%3s)").arg(i+1).arg((int)ids.size()).arg(time.ticks());
		}

		progressDialog.appendText(msg);
		progressDialog.incrementStep();
		QApplication::processEvents();
	}
	progressDialog.setValue(progressDialog.maximumSteps());

	if(graphes_.size())
	{
		update3dView();
		sliderIterationsValueChanged((int)graphes_.size()-1);
	}
	else
	{
		updateGrid();
	}
}

void DatabaseViewer::view3DMap()
{
	if(!ids_.size() || !dbDriver_)
	{
		QMessageBox::warning(this, tr("Cannot view 3D map"), tr("The database is empty..."));
		return;
	}

	if(graphes_.empty())
	{
		this->updateGraphView();
		if(graphes_.empty() || ui_->horizontalSlider_iterations->maximum() != (int)graphes_.size()-1)
		{
			QMessageBox::warning(this, tr("Cannot generate a graph"), tr("No graph in database?!"));
			return;
		}
	}

	std::map<int, Transform> optimizedPoses = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());
	if(ui_->groupBox_posefiltering->isChecked())
	{
		optimizedPoses = graph::radiusPosesFiltering(optimizedPoses,
				ui_->doubleSpinBox_posefilteringRadius->value(),
				ui_->doubleSpinBox_posefilteringAngle->value()*CV_PI/180.0);
	}
	if(optimizedPoses.size() > 0)
	{
		exportDialog_->setDBDriver(dbDriver_);
		exportDialog_->viewClouds(optimizedPoses,
				updateLinksWithModifications(links_),
				mapIds_,
				QMap<int, Signature>(),
				std::map<int, std::pair<pcl::PointCloud<pcl::PointXYZRGB>::Ptr, pcl::IndicesPtr> >(),
				std::map<int, cv::Mat>(),
				pathDatabase_,
				ui_->parameters_toolbox->getParameters());
	}
	else
	{
		QMessageBox::critical(this, tr("Error"), tr("No neighbors found for node %1.").arg(ui_->spinBox_optimizationsFrom->value()));
	}
}

void DatabaseViewer::generate3DMap()
{
	if(!ids_.size() || !dbDriver_)
	{
		QMessageBox::warning(this, tr("Cannot generate a graph"), tr("The database is empty..."));
		return;
	}

	if(graphes_.empty())
	{
		this->updateGraphView();
		if(graphes_.empty() || ui_->horizontalSlider_iterations->maximum() != (int)graphes_.size()-1)
		{
			QMessageBox::warning(this, tr("Cannot generate a graph"), tr("No graph in database?!"));
			return;
		}
	}

	std::map<int, Transform> optimizedPoses = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());
	if(ui_->groupBox_posefiltering->isChecked())
	{
		optimizedPoses = graph::radiusPosesFiltering(optimizedPoses,
				ui_->doubleSpinBox_posefilteringRadius->value(),
				ui_->doubleSpinBox_posefilteringAngle->value()*CV_PI/180.0);
	}
	if(optimizedPoses.size() > 0)
	{
		exportDialog_->setDBDriver(dbDriver_);
		exportDialog_->exportClouds(optimizedPoses,
				updateLinksWithModifications(links_),
				mapIds_,
				QMap<int, Signature>(),
				std::map<int, std::pair<pcl::PointCloud<pcl::PointXYZRGB>::Ptr, pcl::IndicesPtr> >(),
				std::map<int, cv::Mat>(),
				pathDatabase_,
				ui_->parameters_toolbox->getParameters());
	}
	else
	{
		QMessageBox::critical(this, tr("Error"), tr("No neighbors found for node %1.").arg(ui_->spinBox_optimizationsFrom->value()));
	}
}

void DatabaseViewer::detectMoreLoopClosures()
{
	if(graphes_.empty())
	{
		this->updateGraphView();
		if(graphes_.empty() || ui_->horizontalSlider_iterations->maximum() != (int)graphes_.size()-1)
		{
			QMessageBox::warning(this, tr("Cannot generate a graph"), tr("No graph in database?!"));
			return;
		}
	}

	const std::map<int, Transform> & optimizedPoses = graphes_.back();

	rtabmap::ProgressDialog * progressDialog = new rtabmap::ProgressDialog(this);
	progressDialog->setAttribute(Qt::WA_DeleteOnClose);
	progressDialog->setMaximumSteps(1);
	progressDialog->setCancelButtonVisible(true);
	progressDialog->setMinimumWidth(800);
	progressDialog->show();

	int iterations = ui_->spinBox_detectMore_iterations->value();
	UASSERT(iterations > 0);
	int added = 0;
	std::multimap<int, int> checkedLoopClosures;
	std::pair<int, int> lastAdded(0,0);
	for(int n=0; n<iterations; ++n)
	{
		UINFO("iteration %d/%d", n+1, iterations);
		std::multimap<int, int> clusters = rtabmap::graph::radiusPosesClustering(
				optimizedPoses,
				ui_->doubleSpinBox_detectMore_radius->value(),
				ui_->doubleSpinBox_detectMore_angle->value()*CV_PI/180.0);

		progressDialog->setMaximumSteps(progressDialog->maximumSteps()+(int)clusters.size());
		progressDialog->appendText(tr("Looking for more loop closures, clusters found %1 clusters.").arg(clusters.size()));
		QApplication::processEvents();
		if(progressDialog->isCanceled())
		{
			break;
		}

		std::set<int> addedLinks;
		int i=0;
		for(std::multimap<int, int>::iterator iter=clusters.begin(); iter!= clusters.end() && !progressDialog->isCanceled(); ++iter, ++i)
		{
			int from = iter->first;
			int to = iter->second;
			if(from < to)
			{
				from = iter->second;
				to = iter->first;
			}

			// only add new links and one per cluster per iteration
			if(rtabmap::graph::findLink(checkedLoopClosures, from, to) == checkedLoopClosures.end())
			{
				if(!findActiveLink(from, to).isValid() && !containsLink(linksRemoved_, from, to) &&
				   addedLinks.find(from) == addedLinks.end() && addedLinks.find(to) == addedLinks.end())
				{
					checkedLoopClosures.insert(std::make_pair(from, to));
					if(addConstraint(from, to, true))
					{
						UINFO("Added new loop closure between %d and %d.", from, to);
						++added;
						addedLinks.insert(from);
						addedLinks.insert(to);
						lastAdded.first = from;
						lastAdded.second = to;

						progressDialog->appendText(tr("Detected loop closure %1->%2! (%3/%4)").arg(from).arg(to).arg(i+1).arg(clusters.size()));
						QApplication::processEvents();
					}
				}
			}
			progressDialog->incrementStep();
			if(i%100)
			{
				QApplication::processEvents();
			}
		}
		UINFO("Iteration %d/%d: added %d loop closures.", n+1, iterations, (int)addedLinks.size()/2);
		progressDialog->appendText(tr("Iteration %1/%2: Detected %3 loop closures!").arg(n+1).arg(iterations).arg(addedLinks.size()/2));
		if(addedLinks.size() == 0)
		{
			break;
		}
	}

	if(added)
	{
		this->updateGraphView();
		this->updateLoopClosuresSlider(lastAdded.first, lastAdded.second);
	}
	UINFO("Total added %d loop closures.", added);

	progressDialog->appendText(tr("Total new loop closures detected=%1").arg(added));
	progressDialog->setValue(progressDialog->maximumSteps());
}

void DatabaseViewer::refineAllNeighborLinks()
{
	if(neighborLinks_.size())
	{
		rtabmap::ProgressDialog * progressDialog = new rtabmap::ProgressDialog(this);
		progressDialog->setAttribute(Qt::WA_DeleteOnClose);
		progressDialog->setMaximumSteps(neighborLinks_.size());
		progressDialog->setCancelButtonVisible(true);
		progressDialog->setMinimumWidth(800);
		progressDialog->show();

		for(int i=0; i<neighborLinks_.size(); ++i)
		{
			int from = neighborLinks_[i].from();
			int to = neighborLinks_[i].to();
			this->refineConstraint(neighborLinks_[i].from(), neighborLinks_[i].to(), true);

			progressDialog->appendText(tr("Refined link %1->%2 (%3/%4)").arg(from).arg(to).arg(i+1).arg(neighborLinks_.size()));
			progressDialog->incrementStep();
			QApplication::processEvents();
			if(progressDialog->isCanceled())
			{
				break;
			}
		}
		this->updateGraphView();

		progressDialog->setValue(progressDialog->maximumSteps());
		progressDialog->appendText("Refining links finished!");
	}
}

void DatabaseViewer::refineAllLoopClosureLinks()
{
	if(loopLinks_.size())
	{
		rtabmap::ProgressDialog * progressDialog = new rtabmap::ProgressDialog(this);
		progressDialog->setAttribute(Qt::WA_DeleteOnClose);
		progressDialog->setMaximumSteps(neighborLinks_.size());
		progressDialog->setCancelButtonVisible(true);
		progressDialog->setMinimumWidth(800);
		progressDialog->show();

		for(int i=0; i<loopLinks_.size(); ++i)
		{
			int from = loopLinks_[i].from();
			int to = loopLinks_[i].to();
			this->refineConstraint(loopLinks_[i].from(), loopLinks_[i].to(), true);

			progressDialog->appendText(tr("Refined link %1->%2 (%3/%4)").arg(from).arg(to).arg(i+1).arg(loopLinks_.size()));
			progressDialog->incrementStep();
			QApplication::processEvents();
			if(progressDialog->isCanceled())
			{
				break;
			}
		}
		this->updateGraphView();

		progressDialog->setValue(progressDialog->maximumSteps());
		progressDialog->appendText("Refining links finished!");
	}
}

void DatabaseViewer::resetAllChanges()
{
	linksAdded_.clear();
	linksRefined_.clear();
	linksRemoved_.clear();
	generatedLocalMaps_.clear();
	generatedLocalMapsInfo_.clear();
	updateLoopClosuresSlider();
	this->updateGraphView();
}

void DatabaseViewer::sliderAValueChanged(int value)
{
	this->update(value,
			ui_->label_indexA,
			ui_->label_parentsA,
			ui_->label_childrenA,
			ui_->label_weightA,
			ui_->label_labelA,
			ui_->label_stampA,
			ui_->graphicsView_A,
			ui_->label_idA,
			ui_->label_mapA,
			ui_->label_poseA,
			ui_->label_calibA,
			true);
}

void DatabaseViewer::sliderBValueChanged(int value)
{
	this->update(value,
			ui_->label_indexB,
			ui_->label_parentsB,
			ui_->label_childrenB,
			ui_->label_weightB,
			ui_->label_labelB,
			ui_->label_stampB,
			ui_->graphicsView_B,
			ui_->label_idB,
			ui_->label_mapB,
			ui_->label_poseB,
			ui_->label_calibB,
			true);
}

void DatabaseViewer::update(int value,
						QLabel * labelIndex,
						QLabel * labelParents,
						QLabel * labelChildren,
						QLabel * weight,
						QLabel * label,
						QLabel * stamp,
						rtabmap::ImageView * view,
						QLabel * labelId,
						QLabel * labelMapId,
						QLabel * labelPose,
						QLabel * labelCalib,
						bool updateConstraintView)
{
	UTimer timer;
	labelIndex->setText(QString::number(value));
	labelParents->clear();
	labelChildren->clear();
	weight->clear();
	label->clear();
	labelMapId->clear();
	labelPose->clear();
	stamp->clear();
	labelCalib->clear();
	QRectF rect;
	if(value >= 0 && value < ids_.size())
	{
		view->clear();
		int id = ids_.at(value);
		int mapId = -1;
		labelId->setText(QString::number(id));
		if(id>0)
		{
			//image
			QImage img;
			QImage imgDepth;
			if(dbDriver_)
			{
				SensorData data;
				dbDriver_->getNodeData(id, data);
				data.uncompressData();
				if(!data.imageRaw().empty())
				{
					img = uCvMat2QImage(ui_->label_indexB==labelIndex?data.imageRaw():data.imageRaw());
				}
				if(!data.depthOrRightRaw().empty())
				{
					cv::Mat depth =data.depthOrRightRaw();
					if(!data.depthRaw().empty())
					{
						if(ui_->spinBox_mesh_fillDepthHoles->value() > 0)
						{
							depth = util2d::fillDepthHoles(depth, ui_->spinBox_mesh_fillDepthHoles->value(), float(ui_->spinBox_mesh_depthError->value())/100.0f);
						}
					}
					imgDepth = uCvMat2QImage(depth);
				}

				std::list<int> ids;
				ids.push_back(id);
				std::list<Signature*> signatures;
				dbDriver_->loadSignatures(ids, signatures);

				if(signatures.size() && signatures.front()!=0 && signatures.front()->getWords().size())
				{
					view->setFeatures(signatures.front()->getWords(), data.depthOrRightRaw().type() == CV_8UC1?cv::Mat():data.depthOrRightRaw(), Qt::yellow);
				}

				Transform odomPose, g;
				int w;
				std::string l;
				double s;
				std::vector<float> v;
				dbDriver_->getNodeInfo(id, odomPose, mapId, w, l, s, g, v);

				weight->setNum(w);
				label->setText(l.c_str());
				float x,y,z,roll,pitch,yaw;
				odomPose.getTranslationAndEulerAngles(x,y,z,roll, pitch,yaw);
				labelPose->setText(QString("%1xyz=(%2,%3,%4)\nrpy=(%5,%6,%7)").arg(odomPose.isIdentity()?"* ":"").arg(x).arg(y).arg(z).arg(roll).arg(pitch).arg(yaw));
				if(s!=0.0)
				{
					stamp->setText(QDateTime::fromMSecsSinceEpoch(s*1000.0).toString("dd.MM.yyyy hh:mm:ss.zzz"));
				}
				if(data.cameraModels().size() || data.stereoCameraModel().isValidForProjection())
				{
					if(data.cameraModels().size())
					{
						if(!data.depthRaw().empty() && data.depthRaw().cols!=data.imageRaw().cols && data.imageRaw().cols)
						{
							labelCalib->setText(tr("%1 %2x%3 [%8x%9] fx=%4 fy=%5 cx=%6 cy=%7 T=%10")
									.arg(data.cameraModels().size())
									.arg(data.cameraModels()[0].imageWidth()>0?data.cameraModels()[0].imageWidth():data.imageRaw().cols/data.cameraModels().size())
									.arg(data.cameraModels()[0].imageHeight()>0?data.cameraModels()[0].imageHeight():data.imageRaw().rows)
									.arg(data.cameraModels()[0].fx())
									.arg(data.cameraModels()[0].fy())
									.arg(data.cameraModels()[0].cx())
									.arg(data.cameraModels()[0].cy())
									.arg(data.depthRaw().cols/data.cameraModels().size())
									.arg(data.depthRaw().rows)
									.arg(data.cameraModels()[0].localTransform().prettyPrint().c_str()));
						}
						else
						{
							labelCalib->setText(tr("%1 %2x%3 fx=%4 fy=%5 cx=%6 cy=%7 T=%8")
									.arg(data.cameraModels().size())
									.arg(data.cameraModels()[0].imageWidth()>0?data.cameraModels()[0].imageWidth():data.imageRaw().cols/data.cameraModels().size())
									.arg(data.cameraModels()[0].imageHeight()>0?data.cameraModels()[0].imageHeight():data.imageRaw().rows)
									.arg(data.cameraModels()[0].fx())
									.arg(data.cameraModels()[0].fy())
									.arg(data.cameraModels()[0].cx())
									.arg(data.cameraModels()[0].cy())
									.arg(data.cameraModels()[0].localTransform().prettyPrint().c_str()));
						}
					}
					else
					{
						//stereo
						labelCalib->setText(tr("%1x%2 fx=%3 fy=%4 cx=%5 cy=%6 baseline=%7m T=%8")
									.arg(data.stereoCameraModel().left().imageWidth()>0?data.stereoCameraModel().left().imageWidth():data.imageRaw().cols)
									.arg(data.stereoCameraModel().left().imageHeight()>0?data.stereoCameraModel().left().imageHeight():data.imageRaw().rows)
									.arg(data.stereoCameraModel().left().fx())
									.arg(data.stereoCameraModel().left().fy())
									.arg(data.stereoCameraModel().left().cx())
									.arg(data.stereoCameraModel().left().cy())
									.arg(data.stereoCameraModel().baseline())
									.arg(data.stereoCameraModel().localTransform().prettyPrint().c_str()));
					}

				}
				else
				{
					labelCalib->setText("NA");
				}

				//stereo
				if(!data.depthOrRightRaw().empty() && data.depthOrRightRaw().type() == CV_8UC1)
				{
					this->updateStereo(&data);
				}
				else
				{
					stereoViewer_->clear();
					ui_->graphicsView_stereo->clear();
				}

				// 3d view
				if(cloudViewer_->isVisible())
				{
					Transform pose = Transform::getIdentity();
					if(signatures.size() && ui_->checkBox_odomFrame_3dview->isChecked())
					{
						float x, y, z, roll, pitch, yaw;
						(*signatures.begin())->getPose().getTranslationAndEulerAngles(x, y, z, roll, pitch, yaw);
						pose = Transform(0,0,z,roll,pitch,0);
					}

					cloudViewer_->removeAllFrustums();
					cloudViewer_->removeCloud("mesh");
					cloudViewer_->removeCloud("cloud");
					cloudViewer_->removeCloud("scan");
					cloudViewer_->removeCloud("map");
					cloudViewer_->removeCloud("ground");
					cloudViewer_->removeCloud("obstacles");
					cloudViewer_->removeCloud("words");
					cloudViewer_->removeOctomap();
					if(ui_->checkBox_showCloud->isChecked() || ui_->checkBox_showMesh->isChecked())
					{
						if(!data.depthOrRightRaw().empty())
						{
							if(!data.imageRaw().empty())
							{
								pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud;
								if(!data.depthRaw().empty() && data.cameraModels().size()==1)
								{
									cv::Mat depth = data.depthRaw();
									if(ui_->spinBox_mesh_fillDepthHoles->value() > 0)
									{
										depth = util2d::fillDepthHoles(depth, ui_->spinBox_mesh_fillDepthHoles->value(), float(ui_->spinBox_mesh_depthError->value())/100.0f);
									}
									cloud = util3d::cloudFromDepthRGB(
											data.imageRaw(),
											depth,
											data.cameraModels()[0]);
									if(cloud->size())
									{
										cloud = util3d::transformPointCloud(cloud, data.cameraModels()[0].localTransform());
									}

								}
								else
								{
									cloud = util3d::cloudRGBFromSensorData(data, 1, 0, 0, 0, ui_->parameters_toolbox->getParameters());
								}
								if(cloud->size())
								{
									if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
									{
										cloud = util3d::voxelize(cloud, ui_->doubleSpinBox_voxelSize->value());
									}

									if(ui_->checkBox_showMesh->isChecked() && !cloud->is_dense)
									{
										Eigen::Vector3f viewpoint(0.0f,0.0f,0.0f);
										if(data.cameraModels().size() && !data.cameraModels()[0].localTransform().isNull())
										{
											viewpoint[0] = data.cameraModels()[0].localTransform().x();
											viewpoint[1] = data.cameraModels()[0].localTransform().y();
											viewpoint[2] = data.cameraModels()[0].localTransform().z();
										}
										else if(!data.stereoCameraModel().localTransform().isNull())
										{
											viewpoint[0] = data.stereoCameraModel().localTransform().x();
											viewpoint[1] = data.stereoCameraModel().localTransform().y();
											viewpoint[2] = data.stereoCameraModel().localTransform().z();
										}
										std::vector<pcl::Vertices> polygons = util3d::organizedFastMesh(
												cloud,
												float(ui_->spinBox_mesh_angleTolerance->value())*M_PI/180.0f,
												ui_->checkBox_mesh_quad->isChecked(),
												ui_->spinBox_mesh_triangleSize->value(),
												viewpoint);

										if(ui_->spinBox_mesh_minClusterSize->value())
										{
											// filter polygons
											std::vector<std::set<int> > neighbors;
											std::vector<std::set<int> > vertexToPolygons;
											util3d::createPolygonIndexes(polygons,
													cloud->size(),
													neighbors,
													vertexToPolygons);
											std::list<std::list<int> > clusters = util3d::clusterPolygons(
													neighbors,
													ui_->spinBox_mesh_minClusterSize->value());
											std::vector<pcl::Vertices> filteredPolygons(polygons.size());
											int oi=0;
											for(std::list<std::list<int> >::iterator iter=clusters.begin(); iter!=clusters.end(); ++iter)
											{
												for(std::list<int>::iterator jter=iter->begin(); jter!=iter->end(); ++jter)
												{
													filteredPolygons[oi++] = polygons.at(*jter);
												}
											}
											filteredPolygons.resize(oi);
											polygons = filteredPolygons;
										}

										cloudViewer_->addCloudMesh("mesh", cloud, polygons, pose);
									}
									if(ui_->checkBox_showCloud->isChecked())
									{
										cloudViewer_->addCloud("cloud", cloud, pose);
									}
								}
							}
							else if(ui_->checkBox_showCloud->isChecked())
							{
								pcl::PointCloud<pcl::PointXYZ>::Ptr cloud;
								cloud = util3d::cloudFromSensorData(data, 1, 0, 0, 0, ui_->parameters_toolbox->getParameters());
								if(cloud->size())
								{
									if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
									{
										cloud = util3d::voxelize(cloud, ui_->doubleSpinBox_voxelSize->value());
									}

									cloudViewer_->addCloud("cloud", cloud, pose);
									cloudViewer_->updateCameraFrustum(pose, data.stereoCameraModel());
								}
							}
						}
					}

					//frustums
					if(cloudViewer_->isFrustumShown())
					{
						cloudViewer_->updateCameraFrustums(pose, data.cameraModels());
					}

					//words
					if(ui_->checkBox_showWords->isChecked() && signatures.size())
					{
						pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
						cloud->resize((*signatures.begin())->getWords3().size());
						int i=0;
						for(std::multimap<int, cv::Point3f>::const_iterator iter=(*signatures.begin())->getWords3().begin();
							iter!=(*signatures.begin())->getWords3().end();
							++iter)
						{
							cloud->at(i++) = pcl::PointXYZ(iter->second.x, iter->second.y, iter->second.z);
						}

						if(cloud->size())
						{
							cloud = rtabmap::util3d::removeNaNFromPointCloud(cloud);
						}

						if(cloud->size())
						{
							cloudViewer_->addCloud("words", cloud, pose, Qt::red);
						}
					}

					//add scan
					if(ui_->checkBox_showScan->isChecked() && data.laserScanRaw().cols)
					{
						if(data.laserScanRaw().channels() == 6)
						{
							pcl::PointCloud<pcl::PointNormal>::Ptr scan = util3d::laserScanToPointCloudNormal(data.laserScanRaw(), data.laserScanInfo().localTransform());
							if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
							{
								scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
							}
							cloudViewer_->addCloud("scan", scan, pose, Qt::yellow);
						}
						else
						{
							pcl::PointCloud<pcl::PointXYZ>::Ptr scan = util3d::laserScanToPointCloud(data.laserScanRaw(), data.laserScanInfo().localTransform());
							if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
							{
								scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
							}
							cloudViewer_->addCloud("scan", scan, pose, Qt::yellow);
						}
					}

					//add occupancy grid
					if(ui_->checkBox_showMap->isChecked() || ui_->checkBox_showGrid->isChecked())
					{
						std::map<int, std::pair<cv::Mat, cv::Mat> > localMaps;
						std::map<int, std::pair<float, cv::Point3f> > localMapsInfo;
						if(generatedLocalMaps_.find(data.id()) != generatedLocalMaps_.end())
						{
							localMaps.insert(*generatedLocalMaps_.find(data.id()));
							localMapsInfo.insert(*generatedLocalMapsInfo_.find(data.id()));
						}
						else if(!data.gridGroundCellsRaw().empty() && !data.gridObstacleCellsRaw().empty())
						{
							localMaps.insert(std::make_pair(data.id(), std::make_pair(data.gridGroundCellsRaw(), data.gridObstacleCellsRaw())));
							localMapsInfo.insert(std::make_pair(data.id(), std::make_pair(data.gridCellSize(), data.gridViewPoint())));
						}
						if(!localMaps.empty())
						{
							std::map<int, Transform> poses;
							poses.insert(std::make_pair(data.id(), Transform::getIdentity()));

#ifdef RTABMAP_OCTOMAP
							OctoMap * octomap = 0;
							if(ui_->checkBox_octomap->isChecked() &&
								localMaps.begin()->second.first.channels() > 2 &&
								localMaps.begin()->second.second.channels() > 2 &&
								localMapsInfo.begin()->second.first > 0.0f)
							{
								//create local octomap
								octomap = new OctoMap(localMapsInfo.begin()->second.first);
								octomap->addToCache(data.id(), localMaps.begin()->second.first, localMaps.begin()->second.second, localMapsInfo.begin()->second.second);
								octomap->update(poses);
							}
#endif

							if(ui_->checkBox_showMap->isChecked())
							{
								float xMin=0.0f, yMin=0.0f;
								cv::Mat map8S;
								float gridCellSize = ui_->doubleSpinBox_gridCellSize->value();
#ifdef RTABMAP_OCTOMAP
								if(octomap)
								{
									map8S = octomap->createProjectionMap(xMin, yMin, gridCellSize, 0);
								}
								else
#endif
								{
									map8S = util3d::create2DMapFromOccupancyLocalMaps(
																poses,
																localMaps,
																ui_->doubleSpinBox_gridCellSize->value(),
																xMin, yMin);
									//OccupancyGrid grid(ui_->parameters_toolbox->getParameters());
									//grid.addToCache(data.id(), localMaps.begin()->second.first, localMaps.begin()->second.second);
									//grid.update(poses);
									//map8S = grid.getMap(xMin, yMin);
								}
								if(!map8S.empty())
								{
									//convert to gray scaled map
									cloudViewer_->addOccupancyGridMap(util3d::convertMap2Image8U(map8S), gridCellSize, xMin, yMin, 1);
								}
							}

							if(ui_->checkBox_showGrid->isChecked())
							{
#ifdef RTABMAP_OCTOMAP
								if(octomap)
								{
									if(!ui_->checkBox_grid_cubes->isChecked())
									{
										pcl::IndicesPtr obstacles(new std::vector<int>);
										pcl::IndicesPtr empty(new std::vector<int>);
										pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud = octomap->createCloud(0, obstacles.get(), empty.get());
										pcl::PointCloud<pcl::PointXYZRGB>::Ptr obstaclesCloud(new pcl::PointCloud<pcl::PointXYZRGB>);
										pcl::copyPointCloud(*cloud, *obstacles, *obstaclesCloud);
										cloudViewer_->addCloud("obstacles", obstaclesCloud);
										cloudViewer_->setCloudPointSize("obstacles", 5);
										if(ui_->checkBox_grid_empty->isChecked())
										{
											pcl::PointCloud<pcl::PointXYZ>::Ptr emptyCloud(new pcl::PointCloud<pcl::PointXYZ>);
											pcl::copyPointCloud(*cloud, *empty, *emptyCloud);
											cloudViewer_->addCloud("ground", emptyCloud, Transform::getIdentity(), Qt::white);
											cloudViewer_->setCloudOpacity("ground", 0.5);
											cloudViewer_->setCloudPointSize("ground", 5);
										}
									}
									else
									{
										cloudViewer_->addOctomap(octomap);
									}
								}
								else
#endif
								{
									// occupancy cloud
									cloudViewer_->addCloud("ground",
											util3d::laserScanToPointCloud(localMaps.begin()->second.first),
											Transform::getIdentity(),
											Qt::green);
									cloudViewer_->addCloud("obstacles",
											util3d::laserScanToPointCloud(localMaps.begin()->second.second),
											Transform::getIdentity(),
											Qt::red);
									cloudViewer_->setCloudPointSize("ground", 5);
									cloudViewer_->setCloudPointSize("obstacles", 5);
								}
							}
#ifdef RTABMAP_OCTOMAP
							if(octomap)
							{
								delete octomap;
							}
#endif
						}
					}
					cloudViewer_->update();
				}

				if(signatures.size())
				{
					UASSERT(signatures.front() != 0 && signatures.size() == 1);
					delete signatures.front();
					signatures.clear();
				}
			}

			if(!img.isNull())
			{
				view->setImage(img);
				rect = img.rect();
			}
			else
			{
				ULOGGER_DEBUG("Image is empty");
			}

			if(!imgDepth.isNull())
			{
				view->setImageDepth(imgDepth);
				if(img.isNull())
				{
					rect = imgDepth.rect();
				}
			}
			else
			{
				ULOGGER_DEBUG("Image depth is empty");
			}

			// loops
			std::map<int, rtabmap::Link> links;
			dbDriver_->loadLinks(id, links);
			if(links.size())
			{
				QString strParents, strChildren;
				for(std::map<int, rtabmap::Link>::iterator iter=links.begin(); iter!=links.end(); ++iter)
				{
					if(iter->second.type() != Link::kNeighbor &&
				       iter->second.type() != Link::kNeighborMerged)
					{
						if(iter->first < id)
						{
							strChildren.append(QString("%1 ").arg(iter->first));
						}
						else
						{
							strParents.append(QString("%1 ").arg(iter->first));
						}
					}
				}
				labelParents->setText(strParents);
				labelChildren->setText(strChildren);
			}
		}

		if(mapId>=0)
		{
			labelMapId->setText(QString::number(mapId));
		}
	}
	else
	{
		ULOGGER_ERROR("Slider index out of range ?");
	}

	updateConstraintButtons();
	updateWordsMatching();

	if(updateConstraintView && ui_->dockWidget_constraints->isVisible())
	{
		// update constraint view
		int from = ids_.at(ui_->horizontalSlider_A->value());
		int to = ids_.at(ui_->horizontalSlider_B->value());
		bool set = false;
		for(int i=0; i<loopLinks_.size() || i<neighborLinks_.size(); ++i)
		{
			if(i < loopLinks_.size())
			{
				if((loopLinks_[i].from() == from && loopLinks_[i].to() == to) ||
				   (loopLinks_[i].from() == to && loopLinks_[i].to() == from))
				{
					if(i != ui_->horizontalSlider_loops->value())
					{
						ui_->horizontalSlider_loops->blockSignals(true);
						ui_->horizontalSlider_loops->setValue(i);
						ui_->horizontalSlider_loops->blockSignals(false);
						this->updateConstraintView(loopLinks_[i].from() == from?loopLinks_.at(i):loopLinks_.at(i).inverse(), false);
					}
					ui_->horizontalSlider_neighbors->blockSignals(true);
					ui_->horizontalSlider_neighbors->setValue(0);
					ui_->horizontalSlider_neighbors->blockSignals(false);
					set = true;
					break;
				}
			}
			if(i < neighborLinks_.size())
			{
				if((neighborLinks_[i].from() == from && neighborLinks_[i].to() == to) ||
				   (neighborLinks_[i].from() == to && neighborLinks_[i].to() == from))
				{
					if(i != ui_->horizontalSlider_neighbors->value())
					{
						ui_->horizontalSlider_neighbors->blockSignals(true);
						ui_->horizontalSlider_neighbors->setValue(i);
						ui_->horizontalSlider_neighbors->blockSignals(false);
						this->updateConstraintView(neighborLinks_[i].from() == from?neighborLinks_.at(i):neighborLinks_.at(i).inverse(), false);
					}
					ui_->horizontalSlider_loops->blockSignals(true);
					ui_->horizontalSlider_loops->setValue(0);
					ui_->horizontalSlider_loops->blockSignals(false);
					set = true;
					break;
				}
			}
		}
		if(!set)
		{
			ui_->horizontalSlider_loops->blockSignals(true);
			ui_->horizontalSlider_neighbors->blockSignals(true);
			ui_->horizontalSlider_loops->setValue(0);
			ui_->horizontalSlider_neighbors->setValue(0);
			ui_->horizontalSlider_loops->blockSignals(false);
			ui_->horizontalSlider_neighbors->blockSignals(false);

			constraintsViewer_->removeAllClouds();

			// make a fake link using globally optimized poses
			if(graphes_.size())
			{
				std::map<int, Transform> optimizedPoses = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());
				if(optimizedPoses.size() > 0)
				{
					std::map<int, Transform>::iterator fromIter = optimizedPoses.find(from);
					std::map<int, Transform>::iterator toIter = optimizedPoses.find(to);
					if(fromIter != optimizedPoses.end() &&
					   toIter != optimizedPoses.end())
					{
						Link link(from, to, Link::kUndef, fromIter->second.inverse() * toIter->second);
						this->updateConstraintView(link, false);
					}
				}
			}

			constraintsViewer_->update();

		}
	}

	if(rect.isValid())
	{
		view->setSceneRect(rect);
	}
}

void DatabaseViewer::updateLoggerLevel()
{
	if(this->parent() == 0)
	{
		ULogger::setLevel((ULogger::Level)ui_->comboBox_logger_level->currentIndex());
	}
}

void DatabaseViewer::updateStereo()
{
	if(ui_->horizontalSlider_A->maximum())
	{
		int id = ids_.at(ui_->horizontalSlider_A->value());
		SensorData data;
		dbDriver_->getNodeData(id, data);
		data.uncompressData();
		updateStereo(&data);
	}
}

void DatabaseViewer::updateStereo(const SensorData * data)
{
	if(data &&
		ui_->dockWidget_stereoView->isVisible() &&
		!data->imageRaw().empty() &&
		!data->depthOrRightRaw().empty() &&
		data->depthOrRightRaw().type() == CV_8UC1 &&
		data->stereoCameraModel().isValidForProjection())
	{
		cv::Mat leftMono;
		if(data->imageRaw().channels() == 3)
		{
			cv::cvtColor(data->imageRaw(), leftMono, CV_BGR2GRAY);
		}
		else
		{
			leftMono = data->imageRaw();
		}

		UTimer timer;
		ParametersMap parameters = ui_->parameters_toolbox->getParameters();
		bool opticalFlow = uStr2Bool(parameters.at(Parameters::kStereoOpticalFlow()));
		Stereo * stereo = 0;
		if(opticalFlow)
		{
			stereo = new StereoOpticalFlow(parameters);
		}
		else
		{
			stereo = new Stereo(parameters);
		}

		// generate kpts
		std::vector<cv::KeyPoint> kpts;
		uInsert(parameters, ParametersPair(Parameters::kKpMaxFeatures(), parameters.at(Parameters::kVisMaxFeatures())));
		uInsert(parameters, ParametersPair(Parameters::kKpMinDepth(), parameters.at(Parameters::kVisMinDepth())));
		uInsert(parameters, ParametersPair(Parameters::kKpMaxDepth(), parameters.at(Parameters::kVisMaxDepth())));
		uInsert(parameters, ParametersPair(Parameters::kKpDetectorStrategy(), parameters.at(Parameters::kVisFeatureType())));
		uInsert(parameters, ParametersPair(Parameters::kKpRoiRatios(), parameters.at(Parameters::kVisRoiRatios())));
		uInsert(parameters, ParametersPair(Parameters::kKpSubPixEps(), parameters.at(Parameters::kVisSubPixEps())));
		uInsert(parameters, ParametersPair(Parameters::kKpSubPixIterations(), parameters.at(Parameters::kVisSubPixIterations())));
		uInsert(parameters, ParametersPair(Parameters::kKpSubPixWinSize(), parameters.at(Parameters::kVisSubPixWinSize())));
		Feature2D * kptDetector = Feature2D::create(parameters);
		kpts = kptDetector->generateKeypoints(leftMono);
		delete kptDetector;

		float timeKpt = timer.ticks();

		std::vector<cv::Point2f> leftCorners;
		cv::KeyPoint::convert(kpts, leftCorners);

		// Find features in the new right image
		std::vector<unsigned char> status;
		std::vector<cv::Point2f> rightCorners;

		rightCorners = stereo->computeCorrespondences(
				leftMono,
				data->rightRaw(),
				leftCorners,
				status);
		delete stereo;

		float timeStereo = timer.ticks();

		pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
		cloud->resize(kpts.size());
		float bad_point = std::numeric_limits<float>::quiet_NaN ();
		UASSERT(status.size() == kpts.size());
		int oi = 0;
		int inliers = 0;
		int flowOutliers= 0;
		int slopeOutliers= 0;
		int negativeDisparityOutliers = 0;
		for(unsigned int i=0; i<status.size(); ++i)
		{
			cv::Point3f pt(bad_point, bad_point, bad_point);
			if(status[i])
			{
				float disparity = leftCorners[i].x - rightCorners[i].x;
				if(disparity > 0.0f)
				{
					cv::Point3f tmpPt = util3d::projectDisparityTo3D(
							leftCorners[i],
							disparity,
							data->stereoCameraModel());

					if(util3d::isFinite(tmpPt))
					{
						pt = util3d::transformPoint(tmpPt, data->stereoCameraModel().left().localTransform());
						status[i] = 100; //blue
						++inliers;
						cloud->at(oi++) = pcl::PointXYZ(pt.x, pt.y, pt.z);
					}
				}
				else
				{
					status[i] = 102; //magenta
					++negativeDisparityOutliers;
				}
			}
			else
			{
				++flowOutliers;
			}
		}
		cloud->resize(oi);

		UINFO("correspondences = %d/%d (%f) (time kpt=%fs stereo=%fs)",
				(int)cloud->size(), (int)leftCorners.size(), float(cloud->size())/float(leftCorners.size()), timeKpt, timeStereo);

		stereoViewer_->updateCameraTargetPosition(Transform::getIdentity());
		stereoViewer_->addCloud("stereo", cloud);
		stereoViewer_->update();

		ui_->label_stereo_inliers->setNum(inliers);
		ui_->label_stereo_flowOutliers->setNum(flowOutliers);
		ui_->label_stereo_slopeOutliers->setNum(slopeOutliers);
		ui_->label_stereo_disparityOutliers->setNum(negativeDisparityOutliers);

		std::vector<cv::KeyPoint> rightKpts;
		cv::KeyPoint::convert(rightCorners, rightKpts);
		std::vector<cv::DMatch> good_matches(kpts.size());
		for(unsigned int i=0; i<good_matches.size(); ++i)
		{
			good_matches[i].trainIdx = i;
			good_matches[i].queryIdx = i;
		}


		//
		//cv::Mat imageMatches;
		//cv::drawMatches( leftMono, kpts, data->getDepthRaw(), rightKpts,
		//			   good_matches, imageMatches, cv::Scalar::all(-1), cv::Scalar::all(-1),
		//			   std::vector<char>(), cv::DrawMatchesFlags::NOT_DRAW_SINGLE_POINTS );

		//ui_->graphicsView_stereo->setImage(uCvMat2QImage(imageMatches));

		ui_->graphicsView_stereo->clear();
		ui_->graphicsView_stereo->setLinesShown(true);
		ui_->graphicsView_stereo->setFeaturesShown(false);
		ui_->graphicsView_stereo->setImageDepthShown(true);

		ui_->graphicsView_stereo->setImage(uCvMat2QImage(data->imageRaw()));
		ui_->graphicsView_stereo->setImageDepth(uCvMat2QImage(data->depthOrRightRaw()));

		// Draw lines between corresponding features...
		for(unsigned int i=0; i<kpts.size(); ++i)
		{
			if(rightKpts[i].pt.x > 0 && rightKpts[i].pt.y > 0)
			{
				QColor c = Qt::green;
				if(status[i] == 0)
				{
					c = Qt::red;
				}
				else if(status[i] == 100)
				{
					c = Qt::blue;
				}
				else if(status[i] == 101)
				{
					c = Qt::yellow;
				}
				else if(status[i] == 102)
				{
					c = Qt::magenta;
				}
				else if(status[i] == 110)
				{
					c = Qt::cyan;
				}
				ui_->graphicsView_stereo->addLine(
						kpts[i].pt.x,
						kpts[i].pt.y,
						rightKpts[i].pt.x,
						rightKpts[i].pt.y,
						c,
						QString("%1: (%2,%3) -> (%4,%5)").arg(i).arg(kpts[i].pt.x).arg(kpts[i].pt.y).arg(rightKpts[i].pt.x).arg(rightKpts[i].pt.y));
			}
		}
		ui_->graphicsView_stereo->update();
	}
}

void DatabaseViewer::updateWordsMatching()
{
	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	if(from && to)
	{
		int alpha = 70;
		ui_->graphicsView_A->clearLines();
		ui_->graphicsView_A->setFeaturesColor(QColor(255, 255, 0, alpha)); // yellow
		ui_->graphicsView_B->clearLines();
		ui_->graphicsView_B->setFeaturesColor(QColor(255, 255, 0, alpha)); // yellow

		const QMultiMap<int, KeypointItem*> & wordsA = ui_->graphicsView_A->getFeatures();
		const QMultiMap<int, KeypointItem*> & wordsB = ui_->graphicsView_B->getFeatures();
		if(wordsA.size() && wordsB.size())
		{
			QList<int> ids =  wordsA.uniqueKeys();
			for(int i=0; i<ids.size(); ++i)
			{
				if(wordsA.count(ids[i]) == 1 && wordsB.count(ids[i]) == 1)
				{
					// PINK features
					ui_->graphicsView_A->setFeatureColor(ids[i], Qt::magenta);
					ui_->graphicsView_B->setFeatureColor(ids[i], Qt::magenta);

					// Add lines
					// Draw lines between corresponding features...
					float scaleX = ui_->graphicsView_A->viewScale();
					float deltaX = 0;
					float deltaY = 0;

					if(ui_->actionVertical_Layout->isChecked())
					{
						deltaY = ui_->graphicsView_A->height()/scaleX;
					}
					else
					{
						deltaX = ui_->graphicsView_A->width()/scaleX;
					}

					const KeypointItem * kptA = wordsA.value(ids[i]);
					const KeypointItem * kptB = wordsB.value(ids[i]);
					ui_->graphicsView_A->addLine(
							kptA->rect().x()+kptA->rect().width()/2,
							kptA->rect().y()+kptA->rect().height()/2,
							kptB->rect().x()+kptB->rect().width()/2+deltaX,
							kptB->rect().y()+kptB->rect().height()/2+deltaY,
							Qt::cyan);

					ui_->graphicsView_B->addLine(
							kptA->rect().x()+kptA->rect().width()/2-deltaX,
							kptA->rect().y()+kptA->rect().height()/2-deltaY,
							kptB->rect().x()+kptB->rect().width()/2,
							kptB->rect().y()+kptB->rect().height()/2,
							Qt::cyan);
				}
			}
			ui_->graphicsView_A->update();
			ui_->graphicsView_B->update();
		}
	}
}

void DatabaseViewer::sliderAMoved(int value)
{
	ui_->label_indexA->setText(QString::number(value));
	if(value>=0 && value < ids_.size())
	{
		ui_->label_idA->setText(QString::number(ids_.at(value)));
	}
	else
	{
		ULOGGER_ERROR("Slider index out of range ?");
	}
}

void DatabaseViewer::sliderBMoved(int value)
{
	ui_->label_indexB->setText(QString::number(value));
	if(value>=0 && value < ids_.size())
	{
		ui_->label_idB->setText(QString::number(ids_.at(value)));
	}
	else
	{
		ULOGGER_ERROR("Slider index out of range ?");
	}
}

void DatabaseViewer::update3dView()
{
	if(ui_->dockWidget_view3d->isVisible())
	{
		sliderAValueChanged(ui_->horizontalSlider_A->value());
		sliderBValueChanged(ui_->horizontalSlider_B->value());
	}
}

void DatabaseViewer::sliderNeighborValueChanged(int value)
{
	this->updateConstraintView(neighborLinks_.at(value));
}

void DatabaseViewer::sliderLoopValueChanged(int value)
{
	this->updateConstraintView(loopLinks_.at(value));
}

// only called when ui_->checkBox_showOptimized state changed
void DatabaseViewer::updateConstraintView()
{
	if(ids_.size())
	{
		Link link = this->findActiveLink(ids_.at(ui_->horizontalSlider_A->value()), ids_.at(ui_->horizontalSlider_B->value()));
		if(link.isValid())
		{
			if(link.type() == Link::kNeighbor ||
			   link.type() == Link::kNeighborMerged)
			{
				this->updateConstraintView(neighborLinks_.at(ui_->horizontalSlider_neighbors->value()), false);
			}
			else
			{
				this->updateConstraintView(loopLinks_.at(ui_->horizontalSlider_loops->value()), false);
			}
		}
	}
}

void DatabaseViewer::updateConstraintView(
		const rtabmap::Link & linkIn,
		bool updateImageSliders,
		const Signature & signatureFrom,
		const Signature & signatureTo)
{
	std::multimap<int, Link>::iterator iterLink = rtabmap::graph::findLink(linksRefined_, linkIn.from(), linkIn.to());
	rtabmap::Link link = linkIn;

	if(iterLink != linksRefined_.end())
	{
		link = iterLink->second;
	}
	else if(ui_->checkBox_ignorePoseCorrection->isChecked())
	{
		if(link.type() == Link::kNeighbor ||
		   link.type() == Link::kNeighborMerged)
		{
			Transform poseFrom = uValue(poses_, link.from(), Transform());
			Transform poseTo = uValue(poses_, link.to(), Transform());
			if(!poseFrom.isNull() && !poseTo.isNull())
			{
				// recompute raw odom transformation and
				// reset to identity covariance
				link = Link(link.from(),
						link.to(),
						link.type(),
						poseFrom.inverse() * poseTo);
			}
		}
	}
	rtabmap::Transform t = link.transform();

	ui_->label_constraint->clear();
	ui_->label_constraint_opt->clear();
	ui_->checkBox_showOptimized->setEnabled(false);
	UASSERT(!t.isNull() && dbDriver_);

	ui_->label_type->setText(tr("%1 (%2)")
			.arg(link.type())
			.arg(link.type()==Link::kNeighbor?"Neighbor":
				 link.type()==Link::kNeighborMerged?"Merged neighbor":
				 link.type()==Link::kGlobalClosure?"Loop closure":
				 link.type()==Link::kLocalSpaceClosure?"Space proximity link":
				 link.type()==Link::kLocalTimeClosure?"Time proximity link":
				 link.type()==Link::kUserClosure?"User link":
				 link.type()==Link::kVirtualClosure?"Virtual link":"Undefined"));
	ui_->label_variance->setText(QString("%1, %2")
			.arg(sqrt(link.rotVariance()))
			.arg(sqrt(link.transVariance())));
	ui_->label_constraint->setText(QString("%1").arg(t.prettyPrint().c_str()).replace(" ", "\n"));
	if(graphes_.size() &&
	   (int)graphes_.size()-1 == ui_->horizontalSlider_iterations->maximum())
	{
		std::map<int, rtabmap::Transform> & graph = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());

		std::map<int, rtabmap::Transform>::iterator iterFrom = graph.find(link.from());
		std::map<int, rtabmap::Transform>::iterator iterTo = graph.find(link.to());
		if(iterFrom != graph.end() && iterTo != graph.end())
		{
			ui_->checkBox_showOptimized->setEnabled(true);
			Transform topt = iterFrom->second.inverse()*iterTo->second;
			float diff = topt.getDistance(t);
			Transform v1 = t.rotation()*Transform(1,0,0,0,0,0);
			Transform v2 = topt.rotation()*Transform(1,0,0,0,0,0);
			float a = pcl::getAngle3D(Eigen::Vector4f(v1.x(), v1.y(), v1.z(), 0), Eigen::Vector4f(v2.x(), v2.y(), v2.z(), 0));
			a = (a *180.0f) / CV_PI;
			ui_->label_constraint_opt->setText(QString("%1\n(error=%2% a=%3)").arg(QString(topt.prettyPrint().c_str()).replace(" ", "\n")).arg((diff/t.getNorm())*100.0f).arg(a));

			if(ui_->checkBox_showOptimized->isChecked())
			{
				t = topt;
			}
		}
	}

	if(updateImageSliders)
	{
		ui_->horizontalSlider_A->blockSignals(true);
		ui_->horizontalSlider_B->blockSignals(true);
		// set from on left and to on right		{
		ui_->horizontalSlider_A->setValue(idToIndex_.value(link.from()));
		ui_->horizontalSlider_B->setValue(idToIndex_.value(link.to()));
		ui_->horizontalSlider_A->blockSignals(false);
		ui_->horizontalSlider_B->blockSignals(false);
		this->update(idToIndex_.value(link.from()),
					ui_->label_indexA,
					ui_->label_parentsA,
					ui_->label_childrenA,
					ui_->label_weightA,
					ui_->label_labelA,
					ui_->label_stampA,
					ui_->graphicsView_A,
					ui_->label_idA,
					ui_->label_mapA,
					ui_->label_poseA,
					ui_->label_calibA,
					false); // don't update constraints view!
		this->update(idToIndex_.value(link.to()),
					ui_->label_indexB,
					ui_->label_parentsB,
					ui_->label_childrenB,
					ui_->label_weightB,
					ui_->label_labelB,
					ui_->label_stampB,
					ui_->graphicsView_B,
					ui_->label_idB,
					ui_->label_mapB,
					ui_->label_poseB,
					ui_->label_calibB,
					false); // don't update constraints view!
	}

	if(constraintsViewer_->isVisible())
	{
		SensorData dataFrom, dataTo;

		if(signatureFrom.id()>0)
		{
			dataFrom = signatureFrom.sensorData();
		}
		else
		{
			dbDriver_->getNodeData(link.from(), dataFrom);
		}
		dataFrom.uncompressData();
		UASSERT(dataFrom.imageRaw().empty() || dataFrom.imageRaw().type()==CV_8UC3 || dataFrom.imageRaw().type() == CV_8UC1);
		UASSERT(dataFrom.depthOrRightRaw().empty() || dataFrom.depthOrRightRaw().type()==CV_8UC1 || dataFrom.depthOrRightRaw().type() == CV_16UC1 || dataFrom.depthOrRightRaw().type() == CV_32FC1);

		if(signatureTo.id()>0)
		{
			dataTo = signatureTo.sensorData();
		}
		else
		{
			dbDriver_->getNodeData(link.to(), dataTo);
		}
		dataTo.uncompressData();
		UASSERT(dataTo.imageRaw().empty() || dataTo.imageRaw().type()==CV_8UC3 || dataTo.imageRaw().type() == CV_8UC1);
		UASSERT(dataTo.depthOrRightRaw().empty() || dataTo.depthOrRightRaw().type()==CV_8UC1 || dataTo.depthOrRightRaw().type() == CV_16UC1 || dataTo.depthOrRightRaw().type() == CV_32FC1);

		// get odom pose
		Transform pose = Transform::getIdentity();
		if(ui_->checkBox_odomFrame->isChecked())
		{
			int m,w;
			std::string l;
			double s;
			Transform p,g;
			std::vector<float> v;
			dbDriver_->getNodeInfo(link.from(), p, m, w, l, s, g, v);
			if(!p.isNull())
			{
				// keep just the z and roll/pitch rotation
				float x, y, z, roll, pitch, yaw;
				p.getTranslationAndEulerAngles(x, y, z, roll, pitch, yaw);
				pose = Transform(0,0,z,roll,pitch,0);
			}
		}

		constraintsViewer_->removeCloud("cloud0");
		constraintsViewer_->removeCloud("cloud1");
		//cloud 3d
		if(ui_->checkBox_show3Dclouds->isChecked())
		{
			pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloudFrom, cloudTo;
			pcl::IndicesPtr indicesFrom(new std::vector<int>);
			pcl::IndicesPtr indicesTo(new std::vector<int>);
			if(!dataFrom.imageRaw().empty() && !dataFrom.depthOrRightRaw().empty())
			{
				cloudFrom=util3d::cloudRGBFromSensorData(dataFrom, 1, 0, 0, indicesFrom.get(), ui_->parameters_toolbox->getParameters());
			}
			if(!dataTo.imageRaw().empty() && !dataTo.depthOrRightRaw().empty())
			{
				cloudTo=util3d::cloudRGBFromSensorData(dataTo, 1, 0, 0, indicesTo.get(), ui_->parameters_toolbox->getParameters());
			}

			if(cloudTo.get() && cloudTo->size())
			{
				cloudTo = rtabmap::util3d::transformPointCloud(cloudTo, t);
			}

			// Gain compensation
			if(ui_->doubleSpinBox_gainCompensationRadius->value()>0.0 &&
				cloudFrom.get() && cloudFrom->size() &&
				cloudTo.get() && cloudTo->size())
			{
				UTimer t;
				GainCompensator compensator(ui_->doubleSpinBox_gainCompensationRadius->value());
				compensator.feed(cloudFrom, indicesFrom, cloudTo, indicesTo, Transform::getIdentity());
				compensator.apply(0, cloudFrom, indicesFrom);
				compensator.apply(1, cloudTo, indicesTo);
				UINFO("Gain compensation time = %fs", t.ticks());
			}

			if(cloudFrom.get() && cloudFrom->size())
			{
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					cloudFrom = util3d::voxelize(cloudFrom, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("cloud0", cloudFrom, pose, Qt::red);
			}
			if(cloudTo.get() && cloudTo->size())
			{
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					cloudTo = util3d::voxelize(cloudTo, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("cloud1", cloudTo, pose, Qt::cyan);
			}
		}

		constraintsViewer_->removeCloud("words0");
		constraintsViewer_->removeCloud("words1");
		if(ui_->checkBox_show3DWords->isChecked())
		{
			std::list<int> ids;
			ids.push_back(link.from());
			ids.push_back(link.to());
			std::list<Signature*> signatures;
			dbDriver_->loadSignatures(ids, signatures);
			if(signatures.size() == 2)
			{
				const Signature * sFrom = signatureFrom.id()>0?&signatureFrom:signatures.front();
				const Signature * sTo = signatureTo.id()>0?&signatureTo:signatures.back();
				UASSERT(sFrom && sTo);
				pcl::PointCloud<pcl::PointXYZ>::Ptr cloudFrom(new pcl::PointCloud<pcl::PointXYZ>);
				pcl::PointCloud<pcl::PointXYZ>::Ptr cloudTo(new pcl::PointCloud<pcl::PointXYZ>);
				cloudFrom->resize(sFrom->getWords3().size());
				cloudTo->resize(sTo->getWords3().size());
				int i=0;
				for(std::multimap<int, cv::Point3f>::const_iterator iter=sFrom->getWords3().begin();
					iter!=sFrom->getWords3().end();
					++iter)
				{
					cloudFrom->at(i++) = pcl::PointXYZ(iter->second.x, iter->second.y, iter->second.z);
				}
				i=0;
				for(std::multimap<int, cv::Point3f>::const_iterator iter=sTo->getWords3().begin();
					iter!=sTo->getWords3().end();
					++iter)
				{
					cloudTo->at(i++) = pcl::PointXYZ(iter->second.x, iter->second.y, iter->second.z);
				}

				if(cloudFrom->size())
				{
					cloudFrom = rtabmap::util3d::removeNaNFromPointCloud(cloudFrom);
				}
				if(cloudTo->size())
				{
					cloudTo = rtabmap::util3d::removeNaNFromPointCloud(cloudTo);
					if(cloudTo->size())
					{
						cloudTo = rtabmap::util3d::transformPointCloud(cloudTo, t);
					}
				}

				if(cloudFrom->size())
				{
					constraintsViewer_->addCloud("words0", cloudFrom, pose, Qt::red);
				}
				else
				{
					UWARN("Empty 3D words for node %d", link.from());
					constraintsViewer_->removeCloud("words0");
				}
				if(cloudTo->size())
				{
					constraintsViewer_->addCloud("words1", cloudTo, pose, Qt::cyan);
				}
				else
				{
					UWARN("Empty 3D words for node %d", link.to());
					constraintsViewer_->removeCloud("words1");
				}
			}
			else
			{
				UERROR("Not found signature %d or %d in RAM", link.from(), link.to());
				constraintsViewer_->removeCloud("words0");
				constraintsViewer_->removeCloud("words1");
			}
			//cleanup
			for(std::list<Signature*>::iterator iter=signatures.begin(); iter!=signatures.end(); ++iter)
			{
				delete *iter;
			}
		}

		constraintsViewer_->removeCloud("scan2");
		constraintsViewer_->removeGraph("scan2graph");
		constraintsViewer_->removeCloud("scan0");
		constraintsViewer_->removeCloud("scan1");
		constraintsViewer_->removeCloud("scan2");
		if(ui_->checkBox_show2DScans->isChecked())
		{
			//cloud 2d
			if(link.type() == Link::kLocalSpaceClosure &&
			   !link.userDataCompressed().empty())
			{
				std::vector<int> ids;
				cv::Mat userData = link.uncompressUserDataConst();
				if(userData.type() == CV_8SC1 &&
				   userData.rows == 1 &&
				   userData.cols >= 8 && // including null str ending
				   userData.at<char>(userData.cols-1) == 0 &&
				   memcmp(userData.data, "SCANS:", 6) == 0)
				{
					std::string scansStr = (const char *)userData.data;
					UINFO("Detected \"%s\" in links's user data", scansStr.c_str());
					if(!scansStr.empty())
					{
						std::list<std::string> strs = uSplit(scansStr, ':');
						if(strs.size() == 2)
						{
							std::list<std::string> strIds = uSplit(strs.rbegin()->c_str(), ';');
							for(std::list<std::string>::iterator iter=strIds.begin(); iter!=strIds.end(); ++iter)
							{
								ids.push_back(atoi(iter->c_str()));
								if(ids.back() == link.from())
								{
									ids.pop_back();
								}
							}
						}
					}
				}
				if(ids.size())
				{
					//add other scans matching
					//optimize the path's poses locally

					std::map<int, rtabmap::Transform> poses;
					for(unsigned int i=0; i<ids.size(); ++i)
					{
						if(uContains(poses_, ids[i]))
						{
							poses.insert(*poses_.find(ids[i]));
						}
						else
						{
							UERROR("Not found %d node!", ids[i]);
						}
					}
					if(poses.size())
					{
						Optimizer * optimizer = Optimizer::create(ui_->parameters_toolbox->getParameters());

						UASSERT(uContains(poses, link.to()));
						std::map<int, rtabmap::Transform> posesOut;
						std::multimap<int, rtabmap::Link> linksOut;
						optimizer->getConnectedGraph(
								link.to(),
								poses,
								updateLinksWithModifications(links_),
								posesOut,
								linksOut);

						if(poses.size() != posesOut.size())
						{
							UWARN("Scan poses input and output are different! %d vs %d", (int)poses.size(), (int)posesOut.size());
							UWARN("Input poses: ");
							for(std::map<int, Transform>::iterator iter=poses.begin(); iter!=poses.end(); ++iter)
							{
								UWARN(" %d", iter->first);
							}
							UWARN("Input links: ");
							std::multimap<int, Link> modifiedLinks = updateLinksWithModifications(links_);
							for(std::multimap<int, Link>::iterator iter=modifiedLinks.begin(); iter!=modifiedLinks.end(); ++iter)
							{
								UWARN(" %d->%d", iter->second.from(), iter->second.to());
							}
						}

						QTime time;
						time.start();
						std::map<int, rtabmap::Transform> finalPoses = optimizer->optimize(link.to(), posesOut, linksOut);
						delete optimizer;

						// transform local poses in loop referential
						Transform u = t * finalPoses.at(link.to()).inverse();
						pcl::PointCloud<pcl::PointXYZ>::Ptr assembledScans(new pcl::PointCloud<pcl::PointXYZ>);
						pcl::PointCloud<pcl::PointXYZ>::Ptr graph(new pcl::PointCloud<pcl::PointXYZ>);
						for(std::map<int, Transform>::iterator iter=finalPoses.begin(); iter!=finalPoses.end(); ++iter)
						{
							iter->second = u * iter->second;
							if(iter->first != link.to()) // already added to view
							{
								//create scan
								SensorData data;
								dbDriver_->getNodeData(iter->first, data);
								cv::Mat scan;
								data.uncompressDataConst(0, 0, &scan, 0);
								if(!scan.empty())
								{
									pcl::PointCloud<pcl::PointXYZ>::Ptr scanCloud = util3d::laserScanToPointCloud(scan, data.laserScanInfo().localTransform());
									if(assembledScans->size() == 0)
									{
										assembledScans = util3d::transformPointCloud(scanCloud, iter->second);
									}
									else
									{
										*assembledScans += *util3d::transformPointCloud(scanCloud, iter->second);
									}
								}
							}
							graph->push_back(pcl::PointXYZ(iter->second.x(), iter->second.y(), iter->second.z()));
						}

						if(assembledScans->size())
						{
							if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
							{
								assembledScans = util3d::voxelize(assembledScans, ui_->doubleSpinBox_voxelSize->value());
							}
							constraintsViewer_->addCloud("scan2", assembledScans, pose, Qt::cyan);
						}
						if(graph->size())
						{
							constraintsViewer_->addOrUpdateGraph("scan2graph", graph, Qt::cyan);
						}
					}
				}
			}

			// Added loop closure scans
			constraintsViewer_->removeCloud("scan0");
			constraintsViewer_->removeCloud("scan1");
			if(dataFrom.laserScanRaw().channels() == 6)
			{
				pcl::PointCloud<pcl::PointNormal>::Ptr scan;
				scan = rtabmap::util3d::laserScanToPointCloudNormal(dataFrom.laserScanRaw(), dataFrom.laserScanInfo().localTransform());
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("scan0", scan, pose, Qt::yellow);
			}
			else
			{
				pcl::PointCloud<pcl::PointXYZ>::Ptr scan;
				scan = rtabmap::util3d::laserScanToPointCloud(dataFrom.laserScanRaw(), dataFrom.laserScanInfo().localTransform());
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("scan0", scan, pose, Qt::yellow);
			}
			if(dataTo.laserScanRaw().channels() == 6)
			{
				pcl::PointCloud<pcl::PointNormal>::Ptr scan;
				scan = rtabmap::util3d::laserScanToPointCloudNormal(dataTo.laserScanRaw(), t*dataTo.laserScanInfo().localTransform());
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("scan1", scan, pose, Qt::magenta);
			}
			else
			{
				pcl::PointCloud<pcl::PointXYZ>::Ptr scan;
				scan = rtabmap::util3d::laserScanToPointCloud(dataTo.laserScanRaw(), t*dataTo.laserScanInfo().localTransform());
				if(ui_->doubleSpinBox_voxelSize->value() > 0.0)
				{
					scan = util3d::voxelize(scan, ui_->doubleSpinBox_voxelSize->value());
				}
				constraintsViewer_->addCloud("scan1", scan, pose, Qt::magenta);
			}
		}

		//update coordinate

		constraintsViewer_->addOrUpdateCoordinate("from_coordinate", pose, 0.2);
		constraintsViewer_->addOrUpdateCoordinate("to_coordinate", pose*t, 0.2);
		constraintsViewer_->removeCoordinate("to_coordinate_gt");
		if(uContains(groundTruthPoses_, link.from()) && uContains(groundTruthPoses_, link.to()))
		{
			constraintsViewer_->addOrUpdateCoordinate("to_coordinate_gt",
					pose*(groundTruthPoses_.at(link.from()).inverse()*groundTruthPoses_.at(link.to())), 0.1);
		}

		constraintsViewer_->clearTrajectory();

		constraintsViewer_->update();
	}

	// update buttons
	updateConstraintButtons();
}

void DatabaseViewer::updateConstraintButtons()
{
	ui_->pushButton_refine->setEnabled(false);
	ui_->pushButton_reset->setEnabled(false);
	ui_->pushButton_add->setEnabled(false);
	ui_->pushButton_reject->setEnabled(false);

	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	if(from!=to && from && to && poses_.find(from) != poses_.end() && poses_.find(to) != poses_.end())
	{
		if((!containsLink(links_, from ,to) && !containsLink(linksAdded_, from ,to)) ||
			containsLink(linksRemoved_, from ,to))
		{
			ui_->pushButton_add->setEnabled(true);
		}
	}

	Link currentLink = findActiveLink(from ,to);

	if(currentLink.isValid() &&
		((currentLink.from() == from && currentLink.to() == to) || (currentLink.from() == to && currentLink.to() == from)))
	{
		if(!containsLink(linksRemoved_, from ,to))
		{
			ui_->pushButton_reject->setEnabled(
					currentLink.type() != Link::kNeighbor &&
					currentLink.type() != Link::kNeighborMerged);
		}

		//check for modified link
		bool modified = false;
		std::multimap<int, Link>::iterator iter = rtabmap::graph::findLink(linksRefined_, currentLink.from(), currentLink.to());
		if(iter != linksRefined_.end())
		{
			currentLink = iter->second;
			ui_->pushButton_reset->setEnabled(true);
			modified = true;
		}
		if(!modified)
		{
			ui_->pushButton_reset->setEnabled(false);
		}
		ui_->pushButton_refine->setEnabled(true);
	}
}

void DatabaseViewer::sliderIterationsValueChanged(int value)
{
	if(dbDriver_ && value >=0 && value < (int)graphes_.size())
	{
		std::map<int, rtabmap::Transform> graph = uValueAt(graphes_, value);

		// Log ground truth statistics (in TUM's RGBD-SLAM format)
		if(groundTruthPoses_.size())
		{
			// compute KITTI statistics before aligning the poses
			float length = graph::computePathLength(graph);
			if(groundTruthPoses_.size() == graph.size() && length >= 100.0f)
			{
				float t_err = 0.0f;
				float r_err = 0.0f;
				graph::calcKittiSequenceErrors(uValues(groundTruthPoses_), uValues(graph), t_err, r_err);
				UINFO("KITTI t_err = %f %%", t_err);
				UINFO("KITTI r_err = %f deg/m", r_err);
				ui_->toolBox_statistics->updateStat("GT/kitti_t_err/%", t_err, false);
				ui_->toolBox_statistics->updateStat("GT/kitti_r_err/deg/m", r_err, false);
			}

			if(ui_->checkBox_alignPosesWithGroundTruth->isChecked())
			{
				//align with ground truth for more meaningful results
				pcl::PointCloud<pcl::PointXYZ> cloud1, cloud2;
				cloud1.resize(graph.size());
				cloud2.resize(graph.size());
				int oi = 0;
				int idFirst = 0;
				for(std::map<int, Transform>::const_iterator iter=groundTruthPoses_.begin(); iter!=groundTruthPoses_.end(); ++iter)
				{
					std::map<int, Transform>::iterator iter2 = graph.find(iter->first);
					if(iter2!=graph.end())
					{
						if(oi==0)
						{
							idFirst = iter->first;
						}
						cloud1[oi] = pcl::PointXYZ(iter->second.x(), iter->second.y(), iter->second.z());
						cloud2[oi++] = pcl::PointXYZ(iter2->second.x(), iter2->second.y(), iter2->second.z());
					}
				}

				Transform t = Transform::getIdentity();
				if(oi>5)
				{
					cloud1.resize(oi);
					cloud2.resize(oi);

					t = util3d::transformFromXYZCorrespondencesSVD(cloud2, cloud1);
				}
				else if(idFirst)
				{
					t = groundTruthPoses_.at(idFirst) * graph.at(idFirst).inverse();
				}
				if(!t.isIdentity())
				{
					for(std::map<int, Transform>::iterator iter=graph.begin(); iter!=graph.end(); ++iter)
					{
						iter->second = t * iter->second;
					}
				}
			}

			std::vector<float> translationalErrors(graph.size());
			std::vector<float> rotationalErrors(graph.size());
			float sumTranslationalErrors = 0.0f;
			float sumRotationalErrors = 0.0f;
			float sumSqrdTranslationalErrors = 0.0f;
			float sumSqrdRotationalErrors = 0.0f;
			float radToDegree = 180.0f / M_PI;
			float translational_min = 0.0f;
			float translational_max = 0.0f;
			float rotational_min = 0.0f;
			float rotational_max = 0.0f;
			int oi=0;
			for(std::map<int, Transform>::iterator iter=graph.begin(); iter!=graph.end(); ++iter)
			{
				std::map<int, Transform>::const_iterator jter = groundTruthPoses_.find(iter->first);
				if(jter!=groundTruthPoses_.end())
				{
					Eigen::Vector3f vA = iter->second.toEigen3f().rotation()*Eigen::Vector3f(1,0,0);
					Eigen::Vector3f vB = jter->second.toEigen3f().rotation()*Eigen::Vector3f(1,0,0);
					double a = pcl::getAngle3D(Eigen::Vector4f(vA[0], vA[1], vA[2], 0), Eigen::Vector4f(vB[0], vB[1], vB[2], 0));
					rotationalErrors[oi] = a*radToDegree;
					translationalErrors[oi] = iter->second.getDistance(jter->second);

					sumTranslationalErrors+=translationalErrors[oi];
					sumSqrdTranslationalErrors+=translationalErrors[oi]*translationalErrors[oi];
					sumRotationalErrors+=rotationalErrors[oi];
					sumSqrdRotationalErrors+=rotationalErrors[oi]*rotationalErrors[oi];

					if(oi == 0)
					{
						translational_min = translational_max = translationalErrors[oi];
						rotational_min = rotational_max = rotationalErrors[oi];
					}
					else
					{
						if(translationalErrors[oi] < translational_min)
						{
							translational_min = translationalErrors[oi];
						}
						else if(translationalErrors[oi] > translational_max)
						{
							translational_max = translationalErrors[oi];
						}

						if(rotationalErrors[oi] < rotational_min)
						{
							rotational_min = rotationalErrors[oi];
						}
						else if(rotationalErrors[oi] > rotational_max)
						{
							rotational_max = rotationalErrors[oi];
						}
					}
					++oi;
				}
			}
			translationalErrors.resize(oi);
			rotationalErrors.resize(oi);
			if(oi)
			{
				float total = float(oi);
				float translational_rmse = std::sqrt(sumSqrdTranslationalErrors/total);
				float translational_mean = sumTranslationalErrors/total;
				float translational_median = translationalErrors[oi/2];
				float translational_std = std::sqrt(uVariance(translationalErrors, translational_mean));

				float rotational_rmse = std::sqrt(sumSqrdRotationalErrors/total);
				float rotational_mean = sumRotationalErrors/total;
				float rotational_median = rotationalErrors[oi/2];
				float rotational_std = std::sqrt(uVariance(rotationalErrors, rotational_mean));

				UINFO("translational_rmse=%f", translational_rmse);
				UINFO("translational_mean=%f", translational_mean);
				UINFO("translational_median=%f", translational_median);
				UINFO("translational_std=%f", translational_std);
				UINFO("translational_min=%f", translational_min);
				UINFO("translational_max=%f", translational_max);

				UINFO("rotational_rmse=%f", rotational_rmse);
				UINFO("rotational_mean=%f", rotational_mean);
				UINFO("rotational_median=%f", rotational_median);
				UINFO("rotational_std=%f", rotational_std);
				UINFO("rotational_min=%f", rotational_min);
				UINFO("rotational_max=%f", rotational_max);

				ui_->toolBox_statistics->updateStat("GT/translational_rmse/", translational_rmse, false);
				ui_->toolBox_statistics->updateStat("GT/translational_mean/", translational_mean, false);
				ui_->toolBox_statistics->updateStat("GT/translational_median/", translational_median, false);
				ui_->toolBox_statistics->updateStat("GT/translational_std/", translational_std, false);
				ui_->toolBox_statistics->updateStat("GT/translational_min/", translational_min, false);
				ui_->toolBox_statistics->updateStat("GT/translational_max/", translational_max, false);

				ui_->toolBox_statistics->updateStat("GT/rotational_rmse/", rotational_rmse, false);
				ui_->toolBox_statistics->updateStat("GT/rotational_mean/", rotational_mean, false);
				ui_->toolBox_statistics->updateStat("GT/rotational_median/", rotational_median, false);
				ui_->toolBox_statistics->updateStat("GT/rotational_std/", rotational_std, false);
				ui_->toolBox_statistics->updateStat("GT/rotational_min/", rotational_min, false);
				ui_->toolBox_statistics->updateStat("GT/rotational_max/", rotational_max, false);
			}
		}

		std::map<int, rtabmap::Transform> graphFiltered = graph;
		if(ui_->groupBox_posefiltering->isChecked())
		{
			graphFiltered = graph::radiusPosesFiltering(graph,
					ui_->doubleSpinBox_posefilteringRadius->value(),
					ui_->doubleSpinBox_posefilteringAngle->value()*CV_PI/180.0);
		}
		std::map<int, std::pair<cv::Mat, cv::Mat> > localMaps;
		std::map<int, std::pair<float, cv::Point3f> > localMapsInfo;
#ifdef RTABMAP_OCTOMAP
		if(octomap_)
		{
			delete octomap_;
			octomap_ = 0;
		}
#endif
		if(ui_->dockWidget_graphView->isVisible() || ui_->dockWidget_occupancyGridView->isVisible())
		{
			//update scans
			UINFO("Update local maps list...");
			std::vector<int> ids = uKeys(graphFiltered);
			for(unsigned int i=0; i<ids.size(); ++i)
			{
				if(generatedLocalMaps_.find(ids[i]) != generatedLocalMaps_.end())
				{
					localMaps.insert(*generatedLocalMaps_.find(ids[i]));
					localMapsInfo.insert(*generatedLocalMapsInfo_.find(ids[i]));
				}
				else if(localMaps_.find(ids[i]) != localMaps_.end())
				{
					if(!localMaps_.find(ids[i])->second.first.empty() || !localMaps_.find(ids[i])->second.first.empty())
					{
						localMaps.insert(*localMaps_.find(ids.at(i)));
						localMapsInfo.insert(*localMapsInfo_.find(ids[i]));
					}
				}
				else
				{
					SensorData data;
					dbDriver_->getNodeData(ids.at(i), data);
					cv::Mat ground, obstacles;
					data.uncompressData(0, 0, 0, 0, &ground, &obstacles);
					localMaps_.insert(std::make_pair(ids.at(i), std::make_pair(ground, obstacles)));
					localMapsInfo_.insert(std::make_pair(ids.at(i), std::make_pair(data.gridCellSize(), data.gridViewPoint())));
					if(!ground.empty() || !obstacles.empty())
					{
						localMaps.insert(std::make_pair(ids.at(i), std::make_pair(ground, obstacles)));
						localMapsInfo.insert(std::make_pair(ids.at(i), std::make_pair(data.gridCellSize(), data.gridViewPoint())));
					}
				}
			}
			//cleanup
			for(std::map<int, std::pair<cv::Mat, cv::Mat> >::iterator iter=localMaps_.begin(); iter!=localMaps_.end();)
			{
				if(graphFiltered.find(iter->first) == graphFiltered.end())
				{
					localMapsInfo_.erase(iter->first);
					localMaps_.erase(iter++);
				}
				else
				{
					++iter;
				}
			}
			UINFO("Update local maps list... done (%d local maps, graph size=%d)", (int)localMaps.size(), (int)graph.size());
		}

		ui_->graphViewer->updateGTGraph(groundTruthPoses_);
		ui_->graphViewer->updateGraph(graph, graphLinks_, mapIds_);
		ui_->graphViewer->clearMap();
		occupancyGridViewer_->clear();
		if(graph.size() && localMaps.size() &&
			(ui_->graphViewer->isGridMapVisible() || ui_->dockWidget_occupancyGridView->isVisible()))
		{
			QTime time;
			time.start();

#ifdef RTABMAP_OCTOMAP
			if(ui_->checkBox_octomap->isChecked())
			{
				octomap_ = new OctoMap(ui_->doubleSpinBox_gridCellSize->value());
				bool updateAborted = false;
				for(std::map<int, std::pair<cv::Mat, cv::Mat> >::iterator iter=localMaps.begin(); iter!=localMaps.end(); ++iter)
				{
					if(iter->second.first.channels() == 2 || iter->second.second.channels() == 2)
					{
						QMessageBox::warning(this, tr(""),
								tr("Some local occupancy grids are 2D, but OctoMap requires 3D local "
									"occupancy grids. Uncheck OctoMap under GUI parameters or generate "
									"3D local occupancy grids (\"Grid/3D\" core parameter)."));
						updateAborted = true;
						break;
					}
					octomap_->addToCache(iter->first, iter->second.first, iter->second.second, localMapsInfo.at(iter->first).second);
				}
				if(!updateAborted)
				{
					octomap_->update(graphFiltered);
				}
			}
#endif

			// Generate 2d grid map?
			if((ui_->dockWidget_graphView->isVisible() && ui_->graphViewer->isGridMapVisible()) ||
			   (ui_->dockWidget_occupancyGridView->isVisible() && ui_->checkBox_grid_2d->isChecked()))
			{
				float xMin, yMin;
				float cell = ui_->doubleSpinBox_gridCellSize->value();
				cv::Mat map;

#ifdef RTABMAP_OCTOMAP
				if(ui_->checkBox_octomap->isChecked())
				{
					map = octomap_->createProjectionMap(xMin, yMin, cell, 0, ui_->spinBox_grid_depth->value());
				}
				else
#endif
				{
					map = rtabmap::util3d::create2DMapFromOccupancyLocalMaps(graphFiltered, localMaps, cell, xMin, yMin, 0, ui_->checkBox_gridErode->isChecked());
				}

				ui_->label_timeGrid->setNum(double(time.elapsed())/1000.0);

				if(!map.empty())
				{
					cv::Mat map8U = rtabmap::util3d::convertMap2Image8U(map);
					if(ui_->dockWidget_graphView->isVisible() && ui_->graphViewer->isGridMapVisible())
					{
						ui_->graphViewer->updateMap(map8U, cell, xMin, yMin);
					}
					if(ui_->dockWidget_occupancyGridView->isVisible() && ui_->checkBox_grid_2d->isChecked())
					{
						occupancyGridViewer_->addOccupancyGridMap(map8U, cell, xMin, yMin, 1.0f);
						occupancyGridViewer_->update();
					}
				}
			}

			// Generate 3d grid map?
			if(ui_->dockWidget_occupancyGridView->isVisible())
			{
#ifdef RTABMAP_OCTOMAP
				if(ui_->checkBox_octomap->isChecked())
				{
					updateOctomapView();
				}
				else
#endif
				{
					pcl::PointCloud<pcl::PointXYZ>::Ptr groundXYZ(new pcl::PointCloud<pcl::PointXYZ>);
					pcl::PointCloud<pcl::PointXYZ>::Ptr obstaclesXYZ(new pcl::PointCloud<pcl::PointXYZ>);
					pcl::PointCloud<pcl::PointXYZRGB>::Ptr groundRGB(new pcl::PointCloud<pcl::PointXYZRGB>);
					pcl::PointCloud<pcl::PointXYZRGB>::Ptr obstaclesRGB(new pcl::PointCloud<pcl::PointXYZRGB>);

					for(std::map<int, std::pair<cv::Mat, cv::Mat> >::iterator iter=localMaps.begin(); iter!=localMaps.end(); ++iter)
					{
						Transform pose = graphFiltered.at(iter->first);
						float x,y,z,roll,pitch,yaw;
						pose.getTranslationAndEulerAngles(x,y,z,roll,pitch,yaw);
						Transform pose2d(x,y, 0, 0, 0, yaw);
						if(!iter->second.first.empty())
						{
							if(iter->second.first.channels() == 4)
							{
								*groundRGB += *util3d::laserScanToPointCloudRGB(iter->second.first, pose);
							}
							else
							{
								*groundXYZ += *util3d::laserScanToPointCloud(iter->second.first, iter->second.first.channels()==2?pose2d:pose);
							}
						}
						if(!iter->second.second.empty())
						{
							if(iter->second.second.channels() == 4)
							{
								*obstaclesRGB += *util3d::laserScanToPointCloudRGB(iter->second.second, pose);
							}
							else
							{
								*obstaclesXYZ += *util3d::laserScanToPointCloud(iter->second.second, iter->second.second.channels()==2?pose2d:pose);
							}
						}
					}
					// occupancy cloud
					if(groundRGB->size())
					{
						groundRGB = util3d::voxelize(groundRGB, ui_->doubleSpinBox_gridCellSize->value());
						occupancyGridViewer_->addCloud("groundRGB",
								groundRGB,
								Transform::getIdentity(),
								Qt::green);
						occupancyGridViewer_->setCloudPointSize("groundRGB", 5);
					}
					if(groundXYZ->size())
					{
						groundXYZ = util3d::voxelize(groundXYZ, ui_->doubleSpinBox_gridCellSize->value());
						occupancyGridViewer_->addCloud("groundXYZ",
								groundXYZ,
								Transform::getIdentity(),
								Qt::green);
						occupancyGridViewer_->setCloudPointSize("groundXYZ", 5);
					}
					if(obstaclesRGB->size())
					{
						obstaclesRGB = util3d::voxelize(obstaclesRGB, ui_->doubleSpinBox_gridCellSize->value());
						occupancyGridViewer_->addCloud("obstaclesRGB",
								obstaclesRGB,
								Transform::getIdentity(),
								Qt::red);
						occupancyGridViewer_->setCloudPointSize("obstaclesRGB", 5);
					}
					if(obstaclesXYZ->size())
					{
						obstaclesXYZ = util3d::voxelize(obstaclesXYZ, ui_->doubleSpinBox_gridCellSize->value());
						occupancyGridViewer_->addCloud("obstaclesXYZ",
								obstaclesXYZ,
								Transform::getIdentity(),
								Qt::red);
						occupancyGridViewer_->setCloudPointSize("obstaclesXYZ", 5);
					}
					occupancyGridViewer_->update();
				}
			}
		}
		ui_->graphViewer->update();
		ui_->label_iterations->setNum(value);

		//compute total length (neighbor links)
		float length = 0.0f;
		for(std::multimap<int, rtabmap::Link>::const_iterator iter=graphLinks_.begin(); iter!=graphLinks_.end(); ++iter)
		{
			std::map<int, rtabmap::Transform>::const_iterator jterA = graph.find(iter->first);
			std::map<int, rtabmap::Transform>::const_iterator jterB = graph.find(iter->second.to());
			if(jterA != graph.end() && jterB != graph.end())
			{
				const rtabmap::Transform & poseA = jterA->second;
				const rtabmap::Transform & poseB = jterB->second;
				if(iter->second.type() == rtabmap::Link::kNeighbor ||
				   iter->second.type() == rtabmap::Link::kNeighborMerged)
				{
					Eigen::Vector3f vA, vB;
					float x,y,z;
					poseA.getTranslation(x,y,z);
					vA[0] = x; vA[1] = y; vA[2] = z;
					poseB.getTranslation(x,y,z);
					vB[0] = x; vB[1] = y; vB[2] = z;
					length += (vB - vA).norm();
				}
			}
		}
		ui_->label_pathLength->setNum(length);
	}
}
void DatabaseViewer::updateGraphView()
{
	ui_->label_loopClosures->clear();
	ui_->label_poses->clear();

	if(poses_.size())
	{
		int fromId = ui_->spinBox_optimizationsFrom->value();
		if(!uContains(poses_, fromId))
		{
			QMessageBox::warning(this, tr(""), tr("Graph optimization from id (%1) for which node is not linked to graph.\n Minimum=%2, Maximum=%3")
						.arg(fromId)
						.arg(poses_.begin()->first)
						.arg(poses_.rbegin()->first));
			return;
		}

		graphes_.clear();
		graphLinks_.clear();

		std::map<int, rtabmap::Transform> poses = poses_;

		// filter current map if not spanning to all maps
		if(!ui_->checkBox_spanAllMaps->isChecked() && uContains(mapIds_, fromId) && mapIds_.at(fromId) >= 0)
		{
			int currentMapId = mapIds_.at(fromId);
			for(std::map<int, rtabmap::Transform>::iterator iter=poses.begin(); iter!=poses.end();)
			{
				if(!uContains(mapIds_, iter->first) ||
					mapIds_.at(iter->first) != currentMapId)
				{
					poses.erase(iter++);
				}
				else
				{
					++iter;
				}
			}
		}

		graphes_.push_back(poses);

		ui_->menuExport_poses->setEnabled(true);
		std::multimap<int, rtabmap::Link> links = links_;

		// filter current map if not spanning to all maps
		if(!ui_->checkBox_spanAllMaps->isChecked() && uContains(mapIds_, fromId) && mapIds_.at(fromId) >= 0)
		{
			int currentMapId = mapIds_.at(fromId);
			for(std::multimap<int, rtabmap::Link>::iterator iter=links.begin(); iter!=links.end();)
			{
				if(!uContains(mapIds_, iter->second.from()) ||
					!uContains(mapIds_, iter->second.to()) ||
					mapIds_.at(iter->second.from()) != currentMapId ||
					mapIds_.at(iter->second.to()) != currentMapId)
				{
					links.erase(iter++);
				}
				else
				{
					++iter;
				}
			}
		}

		if(ui_->checkBox_ignorePoseCorrection->isChecked())
		{
			std::multimap<int, Link> tmp = links;
			std::multimap<int, Link>::iterator jter=links.begin();
			for(std::multimap<int, Link>::iterator iter=tmp.begin(); iter!=tmp.end(); ++iter, ++jter)
			{
				if(iter->second.type() == Link::kNeighbor ||
				   iter->second.type() == Link::kNeighborMerged)
				{
					Transform poseFrom = uValue(poses, iter->second.from(), Transform());
					Transform poseTo = uValue(poses, iter->second.to(), Transform());
					if(!poseFrom.isNull() && !poseTo.isNull())
					{
						// reset to identity covariance
						iter->second = Link(
								iter->second.from(),
								iter->second.to(),
								iter->second.type(),
								poseFrom.inverse() * poseTo);
					}
				}
			}
			links = updateLinksWithModifications(tmp);
		}
		else
		{
			links = updateLinksWithModifications(links);
		}

		// filter links
		int totalNeighbor = 0;
		int totalNeighborMerged = 0;
		int totalGlobal = 0;
		int totalLocalTime = 0;
		int totalLocalSpace = 0;
		int totalUser = 0;
		for(std::multimap<int, rtabmap::Link>::iterator iter=links.begin(); iter!=links.end();)
		{
			if(iter->second.type() == Link::kNeighbor)
			{
				++totalNeighbor;
			}
			else if(iter->second.type() == Link::kNeighborMerged)
			{
				++totalNeighborMerged;
			}
			else if(iter->second.type() == Link::kGlobalClosure)
			{
				if(ui_->checkBox_ignoreGlobalLoop->isChecked())
				{
					links.erase(iter++);
					continue;
				}
				++totalGlobal;
			}
			else if(iter->second.type() == Link::kLocalSpaceClosure)
			{
				if(ui_->checkBox_ignoreLocalLoopSpace->isChecked())
				{
					links.erase(iter++);
					continue;
				}
				++totalLocalSpace;
			}
			else if(iter->second.type() == Link::kLocalTimeClosure)
			{
				if(ui_->checkBox_ignoreLocalLoopTime->isChecked())
				{
					links.erase(iter++);
					continue;
				}
				++totalLocalTime;
			}
			else if(iter->second.type() == Link::kUserClosure)
			{
				if(ui_->checkBox_ignoreUserLoop->isChecked())
				{
					links.erase(iter++);
					continue;
				}
				++totalUser;
			}
			++iter;
		}
		ui_->label_loopClosures->setText(tr("(%1, %2, %3, %4, %5, %6)")
				.arg(totalNeighbor)
				.arg(totalNeighborMerged)
				.arg(totalGlobal)
				.arg(totalLocalSpace)
				.arg(totalLocalTime)
				.arg(totalUser));

		Optimizer * optimizer = Optimizer::create(ui_->parameters_toolbox->getParameters());

		std::map<int, rtabmap::Transform> posesOut;
		std::multimap<int, rtabmap::Link> linksOut;
		UINFO("Get connected graph from %d (%d poses, %d links)", fromId, (int)poses.size(), (int)links.size());
		optimizer->getConnectedGraph(
				fromId,
				poses,
				links,
				posesOut,
				linksOut,
				ui_->spinBox_optimizationDepth->value());
		UINFO("Connected graph of %d poses and %d links", (int)posesOut.size(), (int)linksOut.size());
		QTime time;
		time.start();
		std::map<int, rtabmap::Transform> finalPoses = optimizer->optimize(fromId, posesOut, linksOut, &graphes_);
		ui_->label_timeOptimization->setNum(double(time.elapsed())/1000.0);
		graphes_.push_back(finalPoses);
		graphLinks_ = linksOut;
		ui_->label_poses->setNum((int)finalPoses.size());
		delete optimizer;
		if(posesOut.size() && finalPoses.empty())
		{
			QMessageBox::warning(this, tr("Graph optimization error!"), tr("Graph optimization has failed. See the terminal for potential errors."));
		}

		if(uContains(groundTruthPoses_, fromId) && uContains(posesOut, fromId))
		{
			// adjust the ground truth to fit the root
			Transform t = posesOut.at(fromId) * groundTruthPoses_.at(fromId).inverse();
			for(std::map<int, Transform>::iterator iter=groundTruthPoses_.begin(); iter!=groundTruthPoses_.end(); ++iter)
			{
				iter->second = t * iter->second;
			}
		}
		else if(groundTruthPoses_.size())
		{
			UWARN("Could not find ground truth for root node %d", fromId);
		}
	}
	if(graphes_.size())
	{
		ui_->horizontalSlider_iterations->setMaximum((int)graphes_.size()-1);
		ui_->horizontalSlider_iterations->setValue((int)graphes_.size()-1);
		ui_->horizontalSlider_iterations->setEnabled(true);
		ui_->spinBox_optimizationsFrom->setEnabled(true);
		sliderIterationsValueChanged((int)graphes_.size()-1);
	}
	else
	{
		ui_->horizontalSlider_iterations->setEnabled(false);
		ui_->spinBox_optimizationsFrom->setEnabled(false);
	}
}

void DatabaseViewer::updateGrid()
{
	if(sender() == ui_->checkBox_grid_2d && !ui_->checkBox_grid_2d->isChecked())
	{
		//just remove map in occupancy grid view
		occupancyGridViewer_->removeOccupancyGridMap();
		occupancyGridViewer_->update();
	}
	else
	{
		ui_->checkBox_grid_cubes->setVisible(ui_->checkBox_octomap->isChecked());
		ui_->spinBox_grid_depth->setVisible(ui_->checkBox_octomap->isChecked());
		ui_->checkBox_grid_empty->setVisible(ui_->checkBox_octomap->isChecked());

		update3dView();
		updateGraphView();
	}
}

void DatabaseViewer::updateOctomapView()
{
#ifdef RTABMAP_OCTOMAP
		if(ui_->checkBox_octomap->isChecked())
		{
			if(octomap_)
			{
				occupancyGridViewer_->removeOctomap();
				occupancyGridViewer_->removeCloud("octomap_obstacles");
				occupancyGridViewer_->removeCloud("octomap_empty");
				if(ui_->checkBox_grid_cubes->isChecked())
				{
					occupancyGridViewer_->addOctomap(octomap_, ui_->spinBox_grid_depth->value());
				}
				else
				{
					pcl::IndicesPtr obstacles(new std::vector<int>);
					pcl::IndicesPtr empty(new std::vector<int>);
					pcl::PointCloud<pcl::PointXYZRGB>::Ptr cloud = octomap_->createCloud(ui_->spinBox_grid_depth->value(), obstacles.get(), empty.get());
					pcl::PointCloud<pcl::PointXYZRGB>::Ptr obstaclesCloud(new pcl::PointCloud<pcl::PointXYZRGB>);
					pcl::copyPointCloud(*cloud, *obstacles, *obstaclesCloud);
					occupancyGridViewer_->addCloud("octomap_obstacles", obstaclesCloud);
					occupancyGridViewer_->setCloudPointSize("octomap_obstacles", 5);
					if(ui_->checkBox_grid_empty->isChecked())
					{
						pcl::PointCloud<pcl::PointXYZ>::Ptr emptyCloud(new pcl::PointCloud<pcl::PointXYZ>);
						pcl::copyPointCloud(*cloud, *empty, *emptyCloud);
						occupancyGridViewer_->addCloud("octomap_empty", emptyCloud, Transform::getIdentity(), Qt::white);
						occupancyGridViewer_->setCloudOpacity("octomap_empty", 0.5);
						occupancyGridViewer_->setCloudPointSize("octomap_empty", 5);
					}
				}
				occupancyGridViewer_->update();
			}
			if(ui_->dockWidget_view3d->isVisible() && ui_->checkBox_showGrid->isChecked())
			{
				this->update3dView();
			}
		}
#endif
}

Link DatabaseViewer::findActiveLink(int from, int to)
{
	Link link;
	std::multimap<int, Link>::iterator findIter = rtabmap::graph::findLink(linksRefined_, from ,to);
	if(findIter != linksRefined_.end())
	{
		link = findIter->second;
	}
	else
	{
		findIter = rtabmap::graph::findLink(linksAdded_, from ,to);
		if(findIter != linksAdded_.end())
		{
			link = findIter->second;
		}
		else if(!containsLink(linksRemoved_, from ,to))
		{
			findIter = rtabmap::graph::findLink(links_, from ,to);
			if(findIter != links_.end())
			{
				link = findIter->second;
			}
		}
	}
	return link;
}

bool DatabaseViewer::containsLink(std::multimap<int, Link> & links, int from, int to)
{
	return rtabmap::graph::findLink(links, from, to) != links.end();
}

void DatabaseViewer::refineConstraint()
{
	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	refineConstraint(from, to, false);
}

void DatabaseViewer::refineConstraint(int from, int to, bool silent)
{
	if(from == to)
	{
		UWARN("Cannot refine link to same node");
		return;
	}

	Link currentLink =  findActiveLink(from, to);
	if(!currentLink.isValid())
	{
		UERROR("Not found link! (%d->%d)", from, to);
		return;
	}
	Transform t = currentLink.transform();
	if(ui_->checkBox_showOptimized->isChecked() &&
	   (currentLink.type() == Link::kNeighbor || currentLink.type() == Link::kNeighborMerged) &&
	   graphes_.size() &&
	   (int)graphes_.size()-1 == ui_->horizontalSlider_iterations->maximum())
	{
		std::map<int, rtabmap::Transform> & graph = uValueAt(graphes_, ui_->horizontalSlider_iterations->value());
		if(currentLink.type() == Link::kNeighbor || currentLink.type() == Link::kNeighborMerged)
		{
			std::map<int, rtabmap::Transform>::iterator iterFrom = graph.find(currentLink.from());
			std::map<int, rtabmap::Transform>::iterator iterTo = graph.find(currentLink.to());
			if(iterFrom != graph.end() && iterTo != graph.end())
			{
				Transform topt = iterFrom->second.inverse()*iterTo->second;
				t = topt;
			}
		}
	}
	else if(ui_->checkBox_ignorePoseCorrection->isChecked() &&
			graph::findLink(linksRefined_, from, to) == linksRefined_.end())
	{
		if(currentLink.type() == Link::kNeighbor ||
		   currentLink.type() == Link::kNeighborMerged)
		{
			Transform poseFrom = uValue(poses_, currentLink.from(), Transform());
			Transform poseTo = uValue(poses_, currentLink.to(), Transform());
			if(!poseFrom.isNull() && !poseTo.isNull())
			{
				t  = poseFrom.inverse() * poseTo; // recompute raw odom transformation
			}
		}
	}

	Transform transform;
	RegistrationInfo info;

	SensorData dataFrom, dataTo;
	dbDriver_->getNodeData(currentLink.from(), dataFrom);
	dbDriver_->getNodeData(currentLink.to(), dataTo);

	ParametersMap parameters = ui_->parameters_toolbox->getParameters();
	Registration * registration = Registration::create(parameters);

	UTimer timer;
	if(registration->isScanRequired())
	{
		if(ui_->checkBox_icp_from_depth->isChecked())
		{
			// generate laser scans from depth image
			cv::Mat tmpA, tmpB, tmpC, tmpD;
			dataFrom.uncompressData(&tmpA, &tmpB, 0);
			dataTo.uncompressData(&tmpC, &tmpD, 0);
			pcl::PointCloud<pcl::PointXYZ>::Ptr cloudFrom = util3d::cloudFromSensorData(
					dataFrom,
					ui_->spinBox_icp_decimation->value()==0?1:ui_->spinBox_icp_decimation->value(),
					ui_->doubleSpinBox_icp_maxDepth->value(),
					ui_->doubleSpinBox_icp_minDepth->value(),
					0,
					ui_->parameters_toolbox->getParameters());
			pcl::PointCloud<pcl::PointXYZ>::Ptr cloudTo = util3d::cloudFromSensorData(
					dataTo,
					ui_->spinBox_icp_decimation->value()==0?1:ui_->spinBox_icp_decimation->value(),
					ui_->doubleSpinBox_icp_maxDepth->value(),
					ui_->doubleSpinBox_icp_minDepth->value(),
					0,
					ui_->parameters_toolbox->getParameters());
			int maxLaserScans = cloudFrom->size();
			dataFrom.setLaserScanRaw(util3d::laserScanFromPointCloud(*util3d::removeNaNFromPointCloud(cloudFrom), Transform()), LaserScanInfo(maxLaserScans, 0));
			dataTo.setLaserScanRaw(util3d::laserScanFromPointCloud(*util3d::removeNaNFromPointCloud(cloudTo), Transform()), LaserScanInfo(maxLaserScans, 0));

			if(!dataFrom.laserScanCompressed().empty() || !dataTo.laserScanCompressed().empty())
			{
				UWARN("There are laser scans in data, but generate laser scan from "
					  "depth image option is activated. Ignoring saved laser scans...");
			}
		}
		else
		{
			cv::Mat tmpA, tmpB;
			dataFrom.uncompressData(0, 0, &tmpA);
			dataTo.uncompressData(0, 0, &tmpB);
		}
	}

	if(registration->isImageRequired())
	{
		cv::Mat tmpA, tmpB, tmpC, tmpD;
		dataFrom.uncompressData(&tmpA, &tmpB, 0);
		dataTo.uncompressData(&tmpC, &tmpD, 0);
	}

	UINFO("Uncompress time: %f s", timer.ticks());

	Signature fromS(dataFrom);
	Signature toS(dataTo);
	transform = registration->computeTransformationMod(fromS, toS, t, &info);
	delete registration;
	UINFO("(%d ->%d) Registration time: %f s", from, to, timer.ticks());

	if(!silent)
	{
		ui_->graphicsView_A->setFeatures(fromS.getWords(), dataFrom.depthRaw());
		ui_->graphicsView_B->setFeatures(toS.getWords(), dataTo.depthRaw());
		updateWordsMatching();
	}

	if(!transform.isNull())
	{
		if(!transform.isIdentity())
		{
			// normalize variance
			info.covariance *= transform.getNorm();
			if(info.covariance.at<double>(0,0)<=0.0)
			{
				info.covariance = cv::Mat::eye(6,6,CV_64FC1)*0.0001; // epsilon if exact transform
			}
		}
		Link newLink(currentLink.from(), currentLink.to(), currentLink.type(), transform, info.covariance.inv());

		bool updated = false;
		std::multimap<int, Link>::iterator iter = linksRefined_.find(currentLink.from());
		while(iter != linksRefined_.end() && iter->first == currentLink.from())
		{
			if(iter->second.to() == currentLink.to() &&
			   iter->second.type() == currentLink.type())
			{
				iter->second = newLink;
				updated = true;
				break;
			}
			++iter;
		}
		if(!updated)
		{
			linksRefined_.insert(std::make_pair(newLink.from(), newLink));

			if(!silent)
			{
				this->updateGraphView();
			}
		}

		if(!silent && ui_->dockWidget_constraints->isVisible())
		{
			this->updateConstraintView(newLink, true, fromS, toS);
		}
	}

	else if(!silent)
	{
		QMessageBox::warning(this,
				tr("Refine link"),
				tr("Cannot find a transformation between nodes %1 and %2").arg(from).arg(to));
	}
}

void DatabaseViewer::addConstraint()
{
	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	addConstraint(from, to, false);
}

bool DatabaseViewer::addConstraint(int from, int to, bool silent)
{
	bool switchedIds = false;
	if(from == to)
	{
		UWARN("Cannot add link to same node");
		return false;
	}
	else if(from < to)
	{
		switchedIds = true;
		int tmp = from;
		from = to;
		to = tmp;
	}

	Link newLink;
	if(!containsLink(linksAdded_, from, to) &&
	   !containsLink(links_, from, to))
	{
		UASSERT(!containsLink(linksRemoved_, from, to));
		UASSERT(!containsLink(linksRefined_, from, to));

		ParametersMap parameters = ui_->parameters_toolbox->getParameters();
		Registration * reg = Registration::create(parameters);

		Transform t;
		RegistrationInfo info;

		std::list<int> ids;
		ids.push_back(from);
		ids.push_back(to);
		std::list<Signature*> signatures;
		dbDriver_->loadSignatures(ids, signatures);
		if(signatures.size() != 2)
		{
			for(std::list<Signature*>::iterator iter=signatures.begin(); iter!=signatures.end(); ++iter)
			{
				delete *iter;
				return false;
			}
		}
		Signature * fromS = *signatures.begin();
		Signature * toS = *signatures.rbegin();

		bool reextractVisualFeatures = uStr2Bool(parameters.at(Parameters::kRGBDLoopClosureReextractFeatures()));
		if(reg->isScanRequired() ||
			reg->isUserDataRequired() ||
			reextractVisualFeatures)
		{
			// Add sensor data to generate features
			dbDriver_->getNodeData(from, fromS->sensorData(), reextractVisualFeatures, reg->isScanRequired(), reg->isUserDataRequired(), false);
			fromS->sensorData().uncompressData();
			dbDriver_->getNodeData(to, toS->sensorData());
			toS->sensorData().uncompressData();
			if(reextractVisualFeatures)
			{
				fromS->setWords(std::multimap<int, cv::KeyPoint>());
				fromS->setWords3(std::multimap<int, cv::Point3f>());
				fromS->setWordsDescriptors(std::multimap<int, cv::Mat>());
				fromS->sensorData().setFeatures(std::vector<cv::KeyPoint>(), std::vector<cv::Point3f>(), cv::Mat());
				toS->setWords(std::multimap<int, cv::KeyPoint>());
				toS->setWords3(std::multimap<int, cv::Point3f>());
				toS->setWordsDescriptors(std::multimap<int, cv::Mat>());
				toS->sensorData().setFeatures(std::vector<cv::KeyPoint>(), std::vector<cv::Point3f>(), cv::Mat());
			}
		}

		t = reg->computeTransformationMod(*fromS, *toS, Transform(), &info);
		delete reg;
		UDEBUG("");

		if(!silent)
		{
			if(switchedIds)
			{
				ui_->graphicsView_A->setFeatures(toS->getWords(), toS->sensorData().depthRaw());
				ui_->graphicsView_B->setFeatures(fromS->getWords(), fromS->sensorData().depthRaw());
			}
			else
			{
				ui_->graphicsView_A->setFeatures(fromS->getWords(), fromS->sensorData().depthRaw());
				ui_->graphicsView_B->setFeatures(toS->getWords(), toS->sensorData().depthRaw());
			}
			updateWordsMatching();
		}
		
		if(!t.isNull())
		{
			if(!t.isIdentity())
			{
				// normalize variance
				info.covariance *= t.getNorm();
				if(info.covariance.at<double>(0,0)<=0.0)
				{
					info.covariance = cv::Mat::eye(6,6,CV_64FC1)*0.0001; // epsilon if exact transform
				}
			}
			newLink = Link(from, to, Link::kUserClosure, t, info.covariance.inv());
		}
		else if(!silent)
		{
			QMessageBox::warning(this,
					tr("Add link"),
					tr("Cannot find a transformation between nodes %1 and %2: %3").arg(from).arg(to).arg(info.rejectedMsg.c_str()));
		}

		for(std::list<Signature*>::iterator iter=signatures.begin(); iter!=signatures.end(); ++iter)
		{
			delete *iter;
		}
	}
	else if(containsLink(linksRemoved_, from, to))
	{
		newLink = rtabmap::graph::findLink(linksRemoved_, from, to)->second;
	}

	bool updateConstraints = newLink.isValid();
	float maxOptimizationError = uStr2Float(ui_->parameters_toolbox->getParameters().at(Parameters::kRGBDOptimizeMaxError()));
	if(newLink.isValid() &&
	   maxOptimizationError > 0.0f &&
	   uStr2Int(ui_->parameters_toolbox->getParameters().at(Parameters::kOptimizerIterations())) > 0.0f)
	{
		int fromId = newLink.from();
		int mapId = mapIds_.at(newLink.from());
		// use first node of the map containing from
		for(std::map<int, int>::iterator iter=mapIds_.begin(); iter!=mapIds_.end(); ++iter)
		{
			if(iter->second == mapId)
			{
				fromId = iter->first;
				break;
			}
		}
		std::multimap<int, Link> linksIn = updateLinksWithModifications(links_);
		linksIn.insert(std::make_pair(newLink.from(), newLink));
		const Link * maxLinearLink = 0;
		const Link * maxAngularLink = 0;
		float maxLinearError = 0.0f;
		float maxAngularError = 0.0f;
		Optimizer * optimizer = Optimizer::create(ui_->parameters_toolbox->getParameters());
		std::map<int, Transform> poses;
		std::multimap<int, Link> links;
		UASSERT(poses_.find(fromId) != poses_.end());
		UASSERT_MSG(poses_.find(newLink.from()) != poses_.end(), uFormat("id=%d poses=%d links=%d", newLink.from(), (int)poses.size(), (int)links.size()).c_str());
		UASSERT_MSG(poses_.find(newLink.to()) != poses_.end(), uFormat("id=%d poses=%d links=%d", newLink.to(), (int)poses.size(), (int)links.size()).c_str());
		optimizer->getConnectedGraph(fromId, poses_, linksIn, poses, links);
		UASSERT(poses.find(fromId) != poses.end());
		UASSERT_MSG(poses.find(newLink.from()) != poses.end(), uFormat("id=%d poses=%d links=%d", newLink.from(), (int)poses.size(), (int)links.size()).c_str());
		UASSERT_MSG(poses.find(newLink.to()) != poses.end(), uFormat("id=%d poses=%d links=%d", newLink.to(), (int)poses.size(), (int)links.size()).c_str());
		UASSERT(graph::findLink(links, newLink.from(), newLink.to()) != links.end());
		poses = optimizer->optimize(fromId, poses, links);
		std::string msg;
		if(poses.size())
		{
			for(std::multimap<int, Link>::iterator iter=links.begin(); iter!=links.end(); ++iter)
			{
				// ignore links with high variance
				if(iter->second.transVariance() <= 1.0 && iter->second.from() != iter->second.to())
				{
					UASSERT(poses.find(iter->second.from())!=poses.end());
					UASSERT(poses.find(iter->second.to())!=poses.end());
					Transform t1 = poses.at(iter->second.from());
					Transform t2 = poses.at(iter->second.to());
					UASSERT(!t1.isNull() && !t2.isNull());
					Transform t = t1.inverse()*t2;
					float linearError = uMax3(
							fabs(iter->second.transform().x() - t.x()),
							fabs(iter->second.transform().y() - t.y()),
							fabs(iter->second.transform().z() - t.z()));
					Eigen::Vector3f vA = t1.toEigen3f().rotation()*Eigen::Vector3f(1,0,0);
					Eigen::Vector3f vB = t2.toEigen3f().rotation()*Eigen::Vector3f(1,0,0);
					float angularError = pcl::getAngle3D(Eigen::Vector4f(vA[0], vA[1], vA[2], 0), Eigen::Vector4f(vB[0], vB[1], vB[2], 0));
					if(linearError > maxLinearError)
					{
						maxLinearError = linearError;
						maxLinearLink = &iter->second;
					}
					if(angularError > maxAngularError)
					{
						maxAngularError = angularError;
						maxAngularLink = &iter->second;
					}
				}
			}
			if(maxLinearLink)
			{
				UINFO("Max optimization linear error = %f m (link %d->%d)", maxLinearError, maxLinearLink->from(), maxLinearLink->to());
			}
			if(maxAngularLink)
			{
				UINFO("Max optimization angular error = %f deg (link %d->%d)", maxAngularError*180.0f/M_PI, maxAngularLink->from(), maxAngularLink->to());
			}

			if(maxLinearError > maxOptimizationError)
			{
				msg = uFormat("Rejecting edge %d->%d because "
						  "graph error is too large after optimization (%f m for edge %d->%d, %f deg for edge %d->%d). "
						  "\"%s\" is %f m.",
						  newLink.from(),
						  newLink.to(),
						  maxLinearError,
						  maxLinearLink->from(),
						  maxLinearLink->to(),
						  maxAngularError*180.0f/M_PI,
						  maxAngularLink?maxAngularLink->from():0,
						  maxAngularLink?maxAngularLink->to():0,
						  Parameters::kRGBDOptimizeMaxError().c_str(),
						  maxOptimizationError);
			}
		}
		else
		{
			msg = uFormat("Rejecting edge %d->%d because graph optimization has failed!",
					  newLink.from(),
					  newLink.to());
		}
		if(!msg.empty())
		{
			UWARN("%s", msg.c_str());
			if(!silent)
			{
				QMessageBox::warning(this,
						tr("Add link"),
						tr("%1").arg(msg.c_str()));
			}

			updateConstraints = false;
		}
	}

	if(updateConstraints)
	{
		if(containsLink(linksRemoved_, from, to))
		{
			//simply remove from linksRemoved
			linksRemoved_.erase(rtabmap::graph::findLink(linksRemoved_, from, to));
		}
		else
		{
			linksAdded_.insert(std::make_pair(newLink.from(), newLink));
		}
		if(!silent)
		{
			updateLoopClosuresSlider(from, to);
			this->updateGraphView();
		}
	}

	return updateConstraints;
}

void DatabaseViewer::resetConstraint()
{
	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	if(from < to)
	{
		int tmp = to;
		to = from;
		from = tmp;
	}

	if(from == to)
	{
		UWARN("Cannot reset link to same node");
		return;
	}


	std::multimap<int, Link>::iterator iter = rtabmap::graph::findLink(linksRefined_, from, to);
	if(iter != linksRefined_.end())
	{
		linksRefined_.erase(iter);
		this->updateGraphView();
	}

	iter = rtabmap::graph::findLink(links_, from, to);
	if(iter != links_.end())
	{
		this->updateConstraintView(iter->second);
	}
	iter = rtabmap::graph::findLink(linksAdded_, from, to);
	if(iter != linksAdded_.end())
	{
		this->updateConstraintView(iter->second);
	}
}

void DatabaseViewer::rejectConstraint()
{
	int from = ids_.at(ui_->horizontalSlider_A->value());
	int to = ids_.at(ui_->horizontalSlider_B->value());
	if(from < to)
	{
		int tmp = to;
		to = from;
		from = tmp;
	}

	if(from == to)
	{
		UWARN("Cannot reject link to same node");
		return;
	}

	bool removed = false;

	// find the original one
	std::multimap<int, Link>::iterator iter;
	iter = rtabmap::graph::findLink(links_, from, to);
	if(iter != links_.end())
	{
		if(iter->second.type() == Link::kNeighbor || iter->second.type() == Link::kNeighborMerged)
		{
			UWARN("Cannot reject neighbor links (%d->%d)", from, to);
			return;
		}
		linksRemoved_.insert(*iter);
		removed = true;
	}

	// remove from refined and added
	iter = rtabmap::graph::findLink(linksRefined_, from, to);
	if(iter != linksRefined_.end())
	{
		linksRefined_.erase(iter);
		removed = true;
	}
	iter = rtabmap::graph::findLink(linksAdded_, from, to);
	if(iter != linksAdded_.end())
	{
		linksAdded_.erase(iter);
		removed = true;
	}
	if(removed)
	{
		this->updateGraphView();
	}
	updateLoopClosuresSlider();
}

std::multimap<int, rtabmap::Link> DatabaseViewer::updateLinksWithModifications(
		const std::multimap<int, rtabmap::Link> & edgeConstraints)
{
	std::multimap<int, rtabmap::Link> links;
	for(std::multimap<int, rtabmap::Link>::const_iterator iter=edgeConstraints.begin();
		iter!=edgeConstraints.end();
		++iter)
	{
		std::multimap<int, rtabmap::Link>::iterator findIter;

		findIter = rtabmap::graph::findLink(linksRemoved_, iter->second.from(), iter->second.to());
		if(findIter != linksRemoved_.end())
		{
			if(!(iter->second.from() == findIter->second.from() &&
			   iter->second.to() == findIter->second.to() &&
			   iter->second.type() == findIter->second.type()))
			{
				UWARN("Links (%d->%d,%d) and (%d->%d,%d) are not equal!?",
						iter->second.from(), iter->second.to(), iter->second.type(),
						findIter->second.from(), findIter->second.to(), findIter->second.type());
			}
			else
			{
				//UINFO("Removed link (%d->%d, %d)", iter->second.from(), iter->second.to(), iter->second.type());
				continue; // don't add this link
			}
		}

		findIter = rtabmap::graph::findLink(linksRefined_, iter->second.from(), iter->second.to());
		if(findIter!=linksRefined_.end())
		{
			if(iter->second.from() == findIter->second.from() &&
			   iter->second.to() == findIter->second.to() &&
			   iter->second.type() == findIter->second.type())
			{
				links.insert(*findIter); // add the refined link
				//UINFO("Updated link (%d->%d, %d)", iter->second.from(), iter->second.to(), iter->second.type());
				continue;
			}
			else
			{
				UWARN("Links (%d->%d,%d) and (%d->%d,%d) are not equal!?",
						iter->second.from(), iter->second.to(), iter->second.type(),
						findIter->second.from(), findIter->second.to(), findIter->second.type());
			}
		}

		links.insert(*iter); // add original link
	}

	//look for added links
	for(std::multimap<int, rtabmap::Link>::const_iterator iter=linksAdded_.begin();
		iter!=linksAdded_.end();
		++iter)
	{
		//UINFO("Added link (%d->%d, %d)", iter->second.from(), iter->second.to(), iter->second.type());
		links.insert(*iter);
	}

	return links;
}

void DatabaseViewer::updateLoopClosuresSlider(int from, int to)
{
	int size = loopLinks_.size();
	loopLinks_.clear();
	std::multimap<int, Link> links = updateLinksWithModifications(links_);
	int position = ui_->horizontalSlider_loops->value();
	for(std::multimap<int, rtabmap::Link>::iterator iter = links.begin(); iter!=links.end(); ++iter)
	{
		if(!iter->second.transform().isNull())
		{
			if(iter->second.type() != rtabmap::Link::kNeighbor &&
			   iter->second.type() != rtabmap::Link::kNeighborMerged)
			{
				if((iter->second.from() == from && iter->second.to() == to) ||
				   (iter->second.to() == from && iter->second.from() == to))
				{
					position = loopLinks_.size();
				}
				loopLinks_.append(iter->second);
			}
		}
		else
		{
			UERROR("Transform null for link from %d to %d", iter->first, iter->second.to());
		}
	}

	if(loopLinks_.size())
	{
		if(loopLinks_.size() == 1)
		{
			// just to be able to move the cursor of the loop slider
			loopLinks_.push_back(loopLinks_.front());
		}
		ui_->horizontalSlider_loops->setMinimum(0);
		ui_->horizontalSlider_loops->setMaximum(loopLinks_.size()-1);
		ui_->horizontalSlider_loops->setEnabled(true);
		if(position != ui_->horizontalSlider_loops->value())
		{
			ui_->horizontalSlider_loops->setValue(position);
		}
		else if(size != loopLinks_.size())
		{
			this->updateConstraintView(loopLinks_.at(position));
		}
	}
	else
	{
		ui_->horizontalSlider_loops->setEnabled(false);
		constraintsViewer_->removeAllClouds();
		constraintsViewer_->update();
		updateConstraintButtons();
	}
}

void DatabaseViewer::notifyParametersChanged(const QStringList & parametersChanged)
{
	bool updateStereo = false;
	bool updateGraphView = false;
	for(QStringList::const_iterator iter=parametersChanged.constBegin();
	   iter!=parametersChanged.constEnd() && (!updateStereo || !updateGraphView);
	   ++iter)
	{
		QString group = iter->split('/').first();
		if(!updateStereo && group == "Stereo")
		{
			updateStereo = true;
			continue;
		}
		if(!updateGraphView && group == "Optimize")
		{
			updateGraphView = true;
			continue;
		}
	}

	if(updateStereo)
	{
		this->updateStereo();
	}
	if(updateGraphView)
	{
		this->updateGraphView();
	}
	this->configModified();
}

} // namespace rtabmap