src/mgl/dcclient.cpp

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