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
  36     if ( dc )
  37     {
  38         m_inPaintHandler = TRUE;
  39
  40         m_globalClippingRegion = win->GetUpdateRegion();
  41         SetMGLDC(dc, FALSE);
  42     }
  43     else
  44     {
  45         m_inPaintHandler = FALSE;
  46
  47         // VS: we have to update here so that screen's content is up-to-date
  48         //     and blitting from wxWindowDC works as expected
  49         win->Update();
  50
  51         dc = new MGLDevCtx(MGL_wmBeginPaint(win->GetHandle()));
  52
  53         MGLRegion clip;
  54         dc->getClipRegion(clip);
  55         m_globalClippingRegion = wxRegion(clip);
  56         SetMGLDC(dc, TRUE);
  57         // TRUE means that dtor will delete MGLDevCtx object
  58         // but it won't destroy MGLDC returned by MGL_wmBeginPaint because
  59         // ~MGLDevCtx() doesn't call destroy()
  60     }
  61 }
  62
  63 wxWindowDC::~wxWindowDC()
  64 {
  65     if ( !m_inPaintHandler )
  66     {
  67         GetMGLDC()->setDC(NULL);
  68         MGL_wmEndPaint(m_wnd->GetHandle());
  69     }
  70 }
  71
  72 wxClientDC::wxClientDC(wxWindow *win) : wxWindowDC(win)
  73 {
  74     wxRect r = m_wnd->GetClientRect();
  75     m_globalClippingRegion.Intersect(r);
  76     SetDeviceOrigin(r.x, r.y);
  77 }