include/wx/msw/dcmemory.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/dcmemory.h
   3 // Purpose:     wxMemoryDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DCMEMORY_H_
  13 #define _WX_DCMEMORY_H_
  14
  15 #include "wx/dcclient.h"
  16
  17 class WXDLLEXPORT wxMemoryDC : public wxDC, public wxMemoryDCBase
  18 {
  19 public:
  20     wxMemoryDC() { CreateCompatible(NULL); Init(); }
  21     wxMemoryDC(wxBitmap& bitmap) { CreateCompatible(NULL); Init(); SelectObject(bitmap); }
  22     wxMemoryDC(wxDC *dc); // Create compatible DC
  23
  24
  25 protected:
  26     // override some base class virtuals
  27     virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  28     virtual void DoGetSize(int* width, int* height) const;
  29     virtual void DoSelect(const wxBitmap& bitmap);
  30
  31     virtual wxBitmap DoGetAsBitmap(const wxRect* subrect) const
  32     { return subrect == NULL ? GetSelectedBitmap() : GetSelectedBitmap().GetSubBitmapOfHDC(*subrect, GetHDC() );}
  33
  34     // create DC compatible with the given one or screen if dc == NULL
  35     bool CreateCompatible(wxDC *dc);
  36
  37     // initialize the newly created DC
  38     void Init();
  39
  40 private:
  41     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMemoryDC)
  42 };
  43
  44 #endif
  45     // _WX_DCMEMORY_H_