src/dfb/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/dfb/dcclient.cpp
   3 // Purpose:     wxWindowDC, wxClientDC and wxPaintDC
   4 // Author:      Vaclav Slavik
   5 // Created:     2006-08-10
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 REA Elektronik GmbH
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ===========================================================================
  12 // declarations
  13 // ===========================================================================
  14
  15 // ---------------------------------------------------------------------------
  16 // headers
  17 // ---------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #include "wx/dcclient.h"
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/window.h"
  30 #endif
  31
  32 #include "wx/dfb/private.h"
  33
  34 // ===========================================================================
  35 // implementation
  36 // ===========================================================================
  37
  38 //-----------------------------------------------------------------------------
  39 // wxWindowDC
  40 //-----------------------------------------------------------------------------
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  43
  44 wxWindowDC::wxWindowDC(wxWindow *win)
  45     : wxDC(win ? win->GetDfbSurface() : NULL)
  46 {
  47     InitForWin(win);
  48 }
  49
  50 void wxWindowDC::InitForWin(wxWindow *win)
  51 {
  52     wxCHECK_RET( win, _T("invalid window") );
  53
  54     // FIXME: this should be made to work: we need to detect that the window
  55     //        is not visible and in that case, a) ignore any drawing actions
  56     //        and b) provide dummy surface that can still be used to get
  57     //        information (e.g. text extents):
  58     wxWindow *w = win;
  59     for ( wxWindow *w = win; w; w = w->GetParent() )
  60     {
  61         // painting on hidden TLW when non-TLW windows are shown is OK,
  62         // DirectFB manages that:
  63         if ( w->IsTopLevel() )
  64             break;
  65
  66         wxASSERT_MSG( w->IsShown(),
  67                       _T("painting on hidden window not implemented yet") );
  68     }
  69
  70
  71     SetFont(win->GetFont());
  72 }
  73
  74 //-----------------------------------------------------------------------------
  75 // base class for wxClientDC and wxPaintDC
  76 //-----------------------------------------------------------------------------
  77
  78 wxClientDCBase::wxClientDCBase(wxWindow *win)
  79 {
  80     wxCHECK_RET( win, _T("invalid window") );
  81
  82     wxRect rect = win->GetClientRect();
  83     DFBRectangle dfbrect = { rect.x, rect.y, rect.width, rect.height };
  84
  85     wxIDirectFBSurfacePtr subsurf(
  86             win->GetDfbSurface()->GetSubSurface(&dfbrect));
  87     if ( !subsurf )
  88         return;
  89
  90     Init(subsurf);
  91     InitForWin(win);
  92
  93     // offset coordinates to account for subsurface's origin coordinates:
  94     SetDeviceOrigin(rect.x, rect.y);
  95 }
  96
  97 //-----------------------------------------------------------------------------
  98 // wxClientDC
  99 //-----------------------------------------------------------------------------
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
 102
 103 wxClientDC::~wxClientDC()
 104 {
 105     // flip to surface so that the changes become visible
 106     wxIDirectFBSurfacePtr surface(GetDirectFBSurface());
 107
 108     // FIXME: do this only if the surface was modified (as opposed to e.g.
 109     //        used only to obtain text metrics)
 110     if ( surface )
 111         surface->Flip(NULL, DSFLIP_NONE);
 112 }
 113
 114 //-----------------------------------------------------------------------------
 115 // wxPaintDC
 116 //-----------------------------------------------------------------------------
 117
 118 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 119
 120 #warning "wxPaintDC ctor must respect m_updateRegion"
 121
 122 wxPaintDC::~wxPaintDC()
 123 {
 124     // NB: do *not* flip the surface: wxPaintDC is used with EVT_PAINT and the
 125     //     surface will be flipped for the entire TLW once all children are
 126     //     repainted
 127 }