Cleanup gui

Fixed crash when a new location (B merged with previous location A through rehearsal) and then loop on a location already merged with the location A (which is not anymore in WM)
Updated rejected hypothesis tag

git-svn-id: http://rtabmap.googlecode.com/svn/trunk/rtabmap@299 f169173b-cf89-36c8-b27e-44dbe73f0c83

guilib/src/ImageView.h

@@ -23,6 +23,9 @@
 #include <QtGui/QGraphicsView>
 #include <QtCore/QRectF>
 
+class QAction;
+class QMenu;
+
 namespace rtabmap {
 
 class ImageView : public QGraphicsView {
@@ -35,6 +38,9 @@ public:
 
 	void resetZoom();
 
+	bool isImageShown();
+	bool isFeaturesShown();
+
 protected:
 	virtual void contextMenuEvent(QContextMenuEvent * e);
 	virtual void wheelEvent(QWheelEvent * e);
@@ -42,10 +48,18 @@ protected:
 private slots:
 	void updateZoom();
 
+private:
+	void updateItemsShown();
+
 private:
 	int _zoom;
 	int _minZoom;
 	QString _savedFileName;
+
+	QMenu * _menu;
+	QAction * _showImage;
+	QAction * _showFeatures;
+	QAction * _saveImage;
 };
 
 }