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 {
  46     InitForWin(win, NULL);
  47 }
  48
  49 void wxWindowDC::InitForWin(wxWindow *win, const wxRect *rect)
  50 {
  51     wxCHECK_RET( win, _T("invalid window") );
  52
  53     // FIXME: this should be made to work: we need to detect that the window
  54     //        is not visible and in that case, a) ignore any drawing actions
  55     //        and b) provide dummy surface that can still be used to get
  56     //        information (e.g. text extents):
  57     for ( wxWindow *w = win; w; w = w->GetParent() )
  58     {
  59         // painting on hidden TLW when non-TLW windows are shown is OK,
  60         // DirectFB manages that:
  61         if ( w->IsTopLevel() )
  62             break;
  63
  64         wxASSERT_MSG( w->IsShown(),
  65                       _T("painting on hidden window not implemented yet") );
  66     }
  67
  68     // check if the rectangle covers full window and so is not needed:
  69     if ( rect && *rect == wxRect(win->GetSize()) )
  70         rect = NULL;
  71
  72     // obtain the surface used for painting:
  73     wxIDirectFBSurfacePtr surface;
  74     if ( !rect )
  75     {
  76         wxCHECK_RET( win->GetSize().x > 0 && win->GetSize().y > 0,
  77                      _T("window has invalid size") );
  78
  79         surface = win->GetDfbSurface();
  80     }
  81     else
  82     {
  83         wxCHECK_RET( !rect || !rect->IsEmpty(), _T("invalid rectangle") );
  84
  85         DFBRectangle dfbrect = { rect->x, rect->y, rect->width, rect->height };
  86         surface = win->GetDfbSurface()->GetSubSurface(&dfbrect);
  87     }
  88
  89     if ( !surface )
  90         return;
  91
  92     Init(surface);
  93     SetFont(win->GetFont());
  94
  95     // offset coordinates to account for subsurface's origin coordinates:
  96     if ( rect )
  97         SetDeviceOrigin(rect->x, rect->y);
  98 }
  99
 100 //-----------------------------------------------------------------------------
 101 // base class for wxClientDC and wxPaintDC
 102 //-----------------------------------------------------------------------------
 103
 104 wxClientDCBase::wxClientDCBase(wxWindow *win)
 105 {
 106     wxCHECK_RET( win, _T("invalid window") );
 107
 108     wxRect rect = win->GetClientRect();
 109     InitForWin(win, &rect);
 110 }
 111
 112 //-----------------------------------------------------------------------------
 113 // wxClientDC
 114 //-----------------------------------------------------------------------------
 115
 116 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
 117
 118 wxClientDC::~wxClientDC()
 119 {
 120     // flip to surface so that the changes become visible
 121     wxIDirectFBSurfacePtr surface(GetDirectFBSurface());
 122
 123     // FIXME: do this only if the surface was modified (as opposed to e.g.
 124     //        used only to obtain text metrics)
 125     if ( surface )
 126         surface->Flip(NULL, DSFLIP_NONE);
 127 }
 128
 129 //-----------------------------------------------------------------------------
 130 // wxPaintDC
 131 //-----------------------------------------------------------------------------
 132
 133 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 134
 135 #warning "wxPaintDC ctor must respect m_updateRegion"
 136
 137 wxPaintDC::~wxPaintDC()
 138 {
 139     // NB: do *not* flip the surface: wxPaintDC is used with EVT_PAINT and the
 140     //     surface will be flipped for the entire TLW once all children are
 141     //     repainted
 142 }