src/msw/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:     wxClientDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dcclient.h"
  14 #endif
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #pragma implementation "dcclient.h"
  19 #endif
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25 #pragma hdrstop
  26 #endif
  27
  28 #ifndef WX_PRECOMP
  29 #endif
  30
  31 #include "wx/dcclient.h"
  32
  33 #include <windows.h>
  34
  35 #if !USE_SHARED_LIBRARY
  36 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxDC)
  37 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  38 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxDC)
  39 #endif
  40
  41 wxClientDC::wxClientDC(void)
  42 {
  43   m_canvas = NULL;
  44 }
  45
  46 wxClientDC::wxClientDC(wxWindow *the_canvas)
  47 {
  48   m_canvas = the_canvas;
  49 //  BeginDrawing();
  50   m_hDC = (WXHDC) ::GetDC((HWND) the_canvas->GetHWND());
  51 }
  52
  53 wxClientDC::~wxClientDC(void)
  54 {
  55 //  EndDrawing();
  56
  57   if (m_canvas && (HDC) m_hDC)
  58   {
  59     SelectOldObjects(m_hDC);
  60
  61     ::ReleaseDC((HWND) m_canvas->GetHWND(), (HDC) m_hDC);
  62         m_hDC = 0;
  63   }
  64 }
  65
  66 wxWindowDC::wxWindowDC(void)
  67 {
  68   m_canvas = NULL;
  69 }
  70
  71 wxWindowDC::wxWindowDC(wxWindow *the_canvas)
  72 {
  73   m_canvas = the_canvas;
  74 //  m_hDC = (WXHDC) ::GetDCEx((HWND) the_canvas->GetHWND(), NULL, DCX_WINDOW);
  75   m_hDC = (WXHDC) ::GetWindowDC((HWND) the_canvas->GetHWND() );
  76   m_hDCCount ++;
  77 }
  78
  79 wxWindowDC::~wxWindowDC(void)
  80 {
  81   if (m_canvas && m_hDC)
  82   {
  83     SelectOldObjects(m_hDC);
  84
  85     ::ReleaseDC((HWND) m_canvas->GetHWND(), (HDC) m_hDC);
  86         m_hDC = 0;
  87   }
  88   m_hDCCount --;
  89 }
  90
  91 wxPaintDC::wxPaintDC(void)
  92 {
  93   m_canvas = NULL;
  94 }
  95
  96 static PAINTSTRUCT g_paintStruct;
  97
  98 // Don't call Begin/EndPaint if it's already been called:
  99 // for example, if calling a base class OnPaint.
 100
 101 WXHDC wxPaintDC::m_staticPaintHDC = 0;
 102 int wxPaintDC::m_staticPaintCount = 0;
 103
 104 wxPaintDC::wxPaintDC(wxWindow *the_canvas)
 105 {
 106         if ( the_canvas && (m_staticPaintCount == 0))
 107         {
 108                 m_hDC = (WXHDC) ::BeginPaint((HWND) the_canvas->GetHWND(), &g_paintStruct);
 109                 m_hDCCount ++;
 110                 m_staticPaintCount ++ ;
 111                 m_staticPaintHDC = m_hDC ;
 112         }
 113         else
 114     {
 115         wxDebugMsg("wxPaintDC: Using existing HDC\n");
 116                 m_hDC = m_staticPaintHDC ;
 117     }
 118
 119   m_canvas = the_canvas;
 120   RECT updateRect1 = g_paintStruct.rcPaint;
 121   m_canvas->m_updateRect.x = updateRect1.left;
 122   m_canvas->m_updateRect.y = updateRect1.top;
 123   m_canvas->m_updateRect.width = updateRect1.right - updateRect1.left;
 124   m_canvas->m_updateRect.height = updateRect1.bottom - updateRect1.top;
 125 //  m_canvas->m_paintHDC = m_staticPaintHDC ;
 126 }
 127
 128 wxPaintDC::~wxPaintDC(void)
 129 {
 130         m_staticPaintCount -- ;
 131
 132         if (m_staticPaintCount == 0)
 133         {
 134 //              m_canvas->m_paintHDC = 0;
 135
 136                 if ( m_hDC && m_canvas)
 137                 {
 138                         ::EndPaint((HWND) m_canvas->GetHWND(), &g_paintStruct);
 139                         m_hDCCount --;
 140                         m_hDC = 0;
 141                 }
 142         else
 143             wxDebugMsg("~wxPaintDC: Did not release HDC\n");
 144
 145                 m_staticPaintHDC = 0 ;
 146         }
 147     else
 148     {
 149         wxDebugMsg("~wxPaintDC: Did not release HDC\n");
 150     }
 151 }