src/mgl/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mgl/dcclient.cpp
   3 // Purpose:
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #ifdef __BORLANDC__
  14     #pragma hdrstop
  15 #endif
  16
  17 #include "wx/dcclient.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/window.h"
  21 #endif
  22
  23 #include <mgraph.hpp>
  24
  25 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  26 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
  27 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxClientDC)
  28
  29 wxWindowDC::wxWindowDC(wxWindow *win) : m_wnd(win)
  30 {
  31     MGLDevCtx *dc = win->GetPaintMGLDC();
  32
  33     if ( dc )
  34     {
  35         m_inPaintHandler = TRUE;
  36
  37         m_globalClippingRegion = win->GetUpdateRegion();
  38         SetMGLDC(dc, FALSE);
  39     }
  40     else
  41     {
  42         m_inPaintHandler = FALSE;
  43
  44         dc = new MGLDevCtx(MGL_wmBeginPaint(win->GetHandle()));
  45
  46         MGLRegion clip;
  47         dc->getClipRegion(clip);
  48         m_globalClippingRegion = wxRegion(clip);
  49         SetMGLDC(dc, TRUE);
  50         // TRUE means that dtor will delete MGLDevCtx object
  51         // but it won't destroy MGLDC returned by MGL_wmBeginPaint because
  52         // ~MGLDevCtx() doesn't call destroy()
  53     }
  54 }
  55
  56 wxWindowDC::~wxWindowDC()
  57 {
  58     if ( !m_inPaintHandler )
  59     {
  60         GetMGLDC()->setDC(NULL);
  61         MGL_wmEndPaint(m_wnd->GetHandle());
  62     }
  63 }
  64
  65 wxClientDC::wxClientDC(wxWindow *win) : wxWindowDC(win)
  66 {
  67     wxRect r = m_wnd->GetClientRect();
  68     m_globalClippingRegion.Intersect(r);
  69     SetClippingRegion(m_globalClippingRegion);
  70     SetDeviceOrigin(r.x, r.y);
  71 }