#include <OS.h>#include <View.h>#include <Region.h>class Layer;class MyView: public BView{public:MyView(BRect frame, const char *name, uint32 resizingMode, uint32 flags);virtual ~MyView();virtual void Draw(BRect area);virtual void MouseDown(BPoint where);virtual void MouseUp(BPoint where);virtual void MouseMoved(BPoint where, uint32 code, const BMessage *a_message);virtual void MessageReceived(BMessage*);void CopyRegion(BRegion *region, int32 xOffset, int32 yOffset);void RequestRedraw();Layer* FindLayer(Layer *lay, BPoint &where) const;Layer *topLayer;BRegion fRedrawReg;private:void DrawSubTree(Layer* lay);bool fTracking;BPoint fLastPos;Layer *fMovingLayer;bool fIsResize;bool fIs2ndButton;};