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 #if !USE_SHARED_LIBRARY
  34 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
  35 #endif
  36
  37 // Create a DC representing the whole screen
  38 wxScreenDC::wxScreenDC(void)
  39 {
  40   m_hDC = (WXHDC) ::GetDC((HWND) NULL);
  41   m_hDCCount ++;
  42
  43   // the background mode is only used for text background
  44   // and is set in DrawText() to OPAQUE as required, other-
  45   // wise always TRANSPARENT, RR
  46   ::SetBkMode( GetHdc(), TRANSPARENT );
  47 }
  48
  49 wxScreenDC::~wxScreenDC(void)
  50 {
  51   SelectOldObjects(m_hDC);
  52   ::ReleaseDC((HWND) NULL, (HDC) m_hDC);
  53   m_hDC = 0;
  54   m_hDCCount --;
  55 }
  56