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     // check if the rectangle covers full window and so is not needed:
  54     if ( rect && *rect == wxRect(win->GetSize()) )
  55         rect = NULL;
  56
  57     // obtain the surface used for painting:
  58     wxIDirectFBSurfacePtr surface;
  59
  60     if ( !win->IsVisible() )
  61     {
  62         // we're painting on invisible window: the changes won't have any
  63         // effect, as the window will be repainted anyhow when it is shown, but
  64         // we still need a valid DC so that e.g. text extents can be measured,
  65         // so let's create a dummy surface that has the same format as the real
  66         // one would have and let the code paint on it:
  67         wxSize size(rect ? rect->GetSize() : win->GetSize());
  68         surface = wxDfbCreateCompatibleSurface(win->GetDfbSurface(), size);
  69     }
  70     else if ( !rect )
  71     {
  72         wxCHECK_RET( win->GetSize().x > 0 && win->GetSize().y > 0,
  73                      _T("window has invalid size") );
  74
  75         surface = win->GetDfbSurface();
  76     }
  77     else
  78     {
  79         wxCHECK_RET( !rect || !rect->IsEmpty(), _T("invalid rectangle") );
  80
  81         DFBRectangle dfbrect = { rect->x, rect->y, rect->width, rect->height };
  82         surface = win->GetDfbSurface()->GetSubSurface(&dfbrect);
  83     }
  84
  85     if ( !surface )
  86         return;
  87
  88     Init(surface);
  89     SetFont(win->GetFont());
  90
  91     // offset coordinates to account for subsurface's origin coordinates:
  92     if ( rect )
  93         SetDeviceOrigin(rect->x, rect->y);
  94 }
  95
  96 //-----------------------------------------------------------------------------
  97 // base class for wxClientDC and wxPaintDC
  98 //-----------------------------------------------------------------------------
  99
 100 wxClientDCBase::wxClientDCBase(wxWindow *win)
 101 {
 102     wxCHECK_RET( win, _T("invalid window") );
 103
 104     wxRect rect = win->GetClientRect();
 105     InitForWin(win, &rect);
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // wxClientDC
 110 //-----------------------------------------------------------------------------
 111
 112 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
 113
 114 wxClientDC::~wxClientDC()
 115 {
 116     // flip to surface so that the changes become visible
 117     wxIDirectFBSurfacePtr surface(GetDirectFBSurface());
 118
 119     // FIXME: do this only if the surface was modified (as opposed to e.g.
 120     //        used only to obtain text metrics)
 121     if ( surface )
 122         surface->Flip(NULL, DSFLIP_NONE);
 123 }
 124
 125 //-----------------------------------------------------------------------------
 126 // wxPaintDC
 127 //-----------------------------------------------------------------------------
 128
 129 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
 130
 131 #warning "wxPaintDC ctor must respect m_updateRegion"
 132
 133 wxPaintDC::~wxPaintDC()
 134 {
 135     // NB: do *not* flip the surface: wxPaintDC is used with EVT_PAINT and the
 136     //     surface will be flipped for the entire TLW once all children are
 137     //     repainted
 138 }