maptool：

报错，没实现；

HPPA/ImageViewer.h

@@ -6,6 +6,8 @@
 #include <QVector>
 #include "RasterLayer.h"
 
+class MapTool;
+
 class Mapcavas : public QGraphicsView
 {
 	Q_OBJECT
@@ -49,6 +51,11 @@ public:
 
 	RasterLayer* rasterLayer() const;
 
+	// MapTool management
+	void setMapTool(MapTool* tool);
+	void unsetMapTool(MapTool* tool);
+	MapTool* mapTool() const;
+
 protected:
 	QGraphicsScene *m_qtGraphicsScene;
 private:
@@ -56,6 +63,7 @@ private:
 	QLabel *m_framNumberLabel;//<2F><>ʾʵʱ<CAB5>ɼ<EFBFBD><C9BC><EFBFBD><EFBFBD><EFBFBD>֡<EFBFBD><D6A1>
 
 	RasterLayer* m_rasterLayer = nullptr; // associated raster layer
+	MapTool* m_mapTool = nullptr;         // current active map tool
 
 	qreal m_translateSpeed;  // ƽ<><C6BD><EFBFBD>ٶ<EFBFBD>
 	qreal m_zoomDelta;  // <20><><EFBFBD>ŵ<EFBFBD><C5B5><EFBFBD><EFBFBD><EFBFBD>