include/wx/dcmemory.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/dcmemory.h
   3 // Purpose:     wxMemoryDC base header
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Julian Smart
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows Licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DCMEMORY_H_BASE_
  13 #define _WX_DCMEMORY_H_BASE_
  14
  15 #include "wx/dc.h"
  16 #include "wx/bitmap.h"
  17
  18
  19 #if wxUSE_NEW_DC
  20
  21 //-----------------------------------------------------------------------------
  22 // wxMemoryDC
  23 //-----------------------------------------------------------------------------
  24
  25 class WXDLLIMPEXP_CORE wxMemoryDC: public wxDC
  26 {
  27 public:
  28     wxMemoryDC();
  29     wxMemoryDC( wxBitmap& bitmap );
  30     wxMemoryDC( wxDC *dc );
  31
  32     // select the given bitmap to draw on it
  33     void SelectObject(wxBitmap& bmp);
  34
  35     // select the given bitmap for read-only
  36     void SelectObjectAsSource(const wxBitmap& bmp);
  37
  38     // get selected bitmap
  39     const wxBitmap& GetSelectedBitmap() const;
  40     wxBitmap& GetSelectedBitmap();
  41
  42 private:
  43     DECLARE_DYNAMIC_CLASS(wxMemoryDC)
  44 };
  45
  46
  47
  48 #else
  49
  50 // NOTE: different native implementations of wxMemoryDC will derive from
  51 //       different wxDC classes (wxPaintDC, wxWindowDC, etc), so that
  52 //       we cannot derive wxMemoryDCBase from wxDC and then use it as the
  53 //       only base class for native impl of wxMemoryDC...
  54 class WXDLLEXPORT wxMemoryDCBase
  55 {
  56 public:
  57     wxMemoryDCBase() { }
  58
  59     // avoid warnings about having virtual functions but non virtual dtor
  60     virtual ~wxMemoryDCBase() { }
  61
  62     // select the given bitmap to draw on it
  63     void SelectObject(wxBitmap& bmp)
  64     {
  65         // make sure that the given wxBitmap is not sharing its data with other
  66         // wxBitmap instances as its contents will be modified by any drawing
  67         // operation done on this DC
  68         if (bmp.IsOk())
  69             bmp.UnShare();
  70
  71         DoSelect(bmp);
  72     }
  73
  74     // select the given bitmap for read-only
  75     virtual void SelectObjectAsSource(const wxBitmap& bmp)
  76     {
  77         DoSelect(bmp);
  78     }
  79
  80 protected:
  81     virtual void DoSelect(const wxBitmap& bmp) = 0;
  82 };
  83
  84
  85 #endif
  86
  87
  88 #if defined(__WXPALMOS__)
  89 #include "wx/palmos/dcmemory.h"
  90 #elif defined(__WXMSW__)
  91 #include "wx/msw/dcmemory.h"
  92 #elif defined(__WXMOTIF__)
  93 #include "wx/motif/dcmemory.h"
  94 #elif defined(__WXGTK20__)
  95 #include "wx/gtk/dcmemory.h"
  96 #elif defined(__WXGTK__)
  97 #include "wx/gtk1/dcmemory.h"
  98 #elif defined(__WXX11__)
  99 #include "wx/x11/dcmemory.h"
 100 #elif defined(__WXMGL__)
 101 #include "wx/mgl/dcmemory.h"
 102 #elif defined(__WXDFB__)
 103 #include "wx/dfb/dcmemory.h"
 104 #elif defined(__WXMAC__)
 105 #include "wx/mac/dcmemory.h"
 106 #elif defined(__WXCOCOA__)
 107 #include "wx/cocoa/dcmemory.h"
 108 #elif defined(__WXPM__)
 109 #include "wx/os2/dcmemory.h"
 110 #endif
 111
 112 #endif
 113     // _WX_DCMEMORY_H_BASE_