src/mgl/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifndef WX_PRECOMP
  18     #include "wx/dcclient.h"
  19     #include "wx/window.h"
  20 #endif
  21
  22 #include <mgraph.hpp>
  23
  24 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  25 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
  26 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxClientDC)
  27
  28 wxWindowDC::wxWindowDC(wxWindow *win) : m_wnd(win)
  29 {
  30     MGLDevCtx *dc = win->GetPaintMGLDC();
  31
  32     if ( dc )
  33     {
  34         m_inPaintHandler = TRUE;
  35
  36         m_globalClippingRegion = win->GetUpdateRegion();
  37         SetMGLDC(dc, FALSE);
  38     }
  39     else
  40     {
  41         m_inPaintHandler = FALSE;
  42
  43         dc = new MGLDevCtx(MGL_wmBeginPaint(win->GetHandle()));
  44
  45         MGLRegion clip;
  46         dc->getClipRegion(clip);
  47         m_globalClippingRegion = wxRegion(clip);
  48         SetMGLDC(dc, TRUE);
  49         // TRUE means that dtor will delete MGLDevCtx object
  50         // but it won't destroy MGLDC returned by MGL_wmBeginPaint because
  51         // ~MGLDevCtx() doesn't call destroy()
  52     }
  53 }
  54
  55 wxWindowDC::~wxWindowDC()
  56 {
  57     if ( !m_inPaintHandler )
  58     {
  59         GetMGLDC()->setDC(NULL);
  60         MGL_wmEndPaint(m_wnd->GetHandle());
  61     }
  62 }
  63
  64 wxClientDC::wxClientDC(wxWindow *win) : wxWindowDC(win)
  65 {
  66     wxRect r = m_wnd->GetClientRect();
  67     m_globalClippingRegion.Intersect(r);
  68     SetClippingRegion(m_globalClippingRegion);
  69     SetDeviceOrigin(r.x, r.y);
  70 }