added a ruler for measuring

added support for meta-data editing
improved element selection
changed zooming
fixed some issues with layer events
fixed issue with 3D outline
fixed loading issue for old maps
some interface changes

MainController.h

@@ -4,19 +4,44 @@
 #include <QObject>
 #include <QModelIndex>
 #include "MainWindow.h"
+#include "mapview/model/MapModelListener.h"
 
 class MapTreeModel;
 class MapModelElement;
 class MapModel;
 
-class MainController : public QObject {
+class ToolMoveMap;
+class ToolRuler;
+class ToolMapZoom;
+class ToolMapGrid;
+class ToolSelector;
+
+class MainController : public QObject, public MapModelListener {
+
 	Q_OBJECT
 
+	ToolMoveMap* moveMap;
+	ToolRuler* ruler;
+	ToolMapZoom* mapZoom;
+	ToolMapGrid* mapGrid;
+	ToolSelector* mapSelector;
+
+
 public:
 	explicit MainController();
 
 	void show() {mw->show();}
 
+public:
+
+	void onLayerChanged(MapLayer* layer) override;
+
+	void onLayerElementAdded(MapLayer* layer, MapModelElement* elem) override;
+
+	void onLayerElementRemoved(MapLayer* layer, const MapModelElement* elem) override;
+
+	void onLayerVisibilityChanged(MapLayer *layer, const bool visible) override;
+
 signals:
 
 public slots:
@@ -37,6 +62,7 @@ public slots:
 
 	void onMapModelAboutToReset();
 	void onMapModelReset();
+	void onMapModelNeedsRepaint();
 
 private slots: