+public:
+ wxMemoryDCImpl( wxMemoryDC *owner );
+ wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap );
+ wxMemoryDCImpl( wxMemoryDC *owner, wxDC *dc ); // Create compatible DC
+
+ // override some base class virtuals
+ virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
+ virtual void DoGetSize(int* width, int* height) const;
+ virtual void DoSelect(const wxBitmap& bitmap);
+
+ virtual wxBitmap DoGetAsBitmap(const wxRect* subrect) const
+ { return subrect == NULL ? GetSelectedBitmap() : GetSelectedBitmap().GetSubBitmapOfHDC(*subrect, GetHDC() );}
+
+protected:
+ // create DC compatible with the given one or screen if dc == NULL
+ bool CreateCompatible(wxDC *dc);