src/msw/dcscreen.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcscreen.cpp
   3 // Purpose:     wxScreenDC 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 "dcscreen.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24    #include "wx/string.h"
  25    #include "wx/window.h"
  26 #endif
  27
  28 #include "wx/msw/private.h"
  29
  30 #include "wx/dcscreen.h"
  31
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
  34
  35 // Create a DC representing the whole screen
  36 wxScreenDC::wxScreenDC(void)
  37 {
  38   m_hDC = (WXHDC) ::GetDC((HWND) NULL);
  39   m_hDCCount ++;
  40
  41   // the background mode is only used for text background
  42   // and is set in DrawText() to OPAQUE as required, other-
  43   // wise always TRANSPARENT, RR
  44   ::SetBkMode( GetHdc(), TRANSPARENT );
  45 }
  46
  47 wxScreenDC::~wxScreenDC(void)
  48 {
  49   SelectOldObjects(m_hDC);
  50   ::ReleaseDC((HWND) NULL, (HDC) m_hDC);
  51   m_hDC = 0;
  52   m_hDCCount --;
  53 }
  54