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 wxMemoryImplDCBase
  26 {
  27 public:
  28     wxMemoryImplDCBase() { }
  29
  30     virtual void DoSelect(const wxBitmap& bmp) = 0;
  31
  32     virtual const wxBitmap& DoGetSelectedBitmap() const = 0;
  33     virtual wxBitmap& DoGetSelectedBitmap() = 0;
  34 };
  35
  36
  37 class WXDLLIMPEXP_CORE wxMemoryDC: public wxDC
  38 {
  39 public:
  40     wxMemoryDC();
  41     wxMemoryDC( wxBitmap& bitmap );
  42     wxMemoryDC( wxDC *dc );
  43
  44     // select the given bitmap to draw on it
  45     void SelectObject(wxBitmap& bmp);
  46
  47     // select the given bitmap for read-only
  48     void SelectObjectAsSource(const wxBitmap& bmp);
  49
  50     // get selected bitmap
  51     const wxBitmap& GetSelectedBitmap() const;
  52     wxBitmap& GetSelectedBitmap();
  53
  54 private:
  55     DECLARE_DYNAMIC_CLASS(wxMemoryDC)
  56 };
  57
  58
  59
  60 #else
  61
  62 // NOTE: different native implementations of wxMemoryDC will derive from
  63 //       different wxDC classes (wxPaintDC, wxWindowDC, etc), so that
  64 //       we cannot derive wxMemoryDCBase from wxDC and then use it as the
  65 //       only base class for native impl of wxMemoryDC...
  66 class WXDLLEXPORT wxMemoryDCBase
  67 {
  68 public:
  69     wxMemoryDCBase() { }
  70
  71     // avoid warnings about having virtual functions but non virtual dtor
  72     virtual ~wxMemoryDCBase() { }
  73
  74     // select the given bitmap to draw on it
  75     void SelectObject(wxBitmap& bmp)
  76     {
  77         // make sure that the given wxBitmap is not sharing its data with other
  78         // wxBitmap instances as its contents will be modified by any drawing
  79         // operation done on this DC
  80         if (bmp.IsOk())
  81             bmp.UnShare();
  82
  83         DoSelect(bmp);
  84     }
  85
  86     // select the given bitmap for read-only
  87     virtual void SelectObjectAsSource(const wxBitmap& bmp)
  88     {
  89         DoSelect(bmp);
  90     }
  91
  92 protected:
  93     virtual void DoSelect(const wxBitmap& bmp) = 0;
  94 };
  95
  96
  97 #endif
  98
  99
 100 #if defined(__WXPALMOS__)
 101 #include "wx/palmos/dcmemory.h"
 102 #elif defined(__WXMSW__)
 103 #include "wx/msw/dcmemory.h"
 104 #elif defined(__WXMOTIF__)
 105 #include "wx/motif/dcmemory.h"
 106 #elif defined(__WXGTK20__)
 107 #include "wx/gtk/dcmemory.h"
 108 #elif defined(__WXGTK__)
 109 #include "wx/gtk1/dcmemory.h"
 110 #elif defined(__WXX11__)
 111 #include "wx/x11/dcmemory.h"
 112 #elif defined(__WXMGL__)
 113 #include "wx/mgl/dcmemory.h"
 114 #elif defined(__WXDFB__)
 115 #include "wx/dfb/dcmemory.h"
 116 #elif defined(__WXMAC__)
 117 #include "wx/mac/dcmemory.h"
 118 #elif defined(__WXCOCOA__)
 119 #include "wx/cocoa/dcmemory.h"
 120 #elif defined(__WXPM__)
 121 #include "wx/os2/dcmemory.h"
 122 #endif
 123
 124 #endif
 125     // _WX_DCMEMORY_H_BASE_