src/gtk/nonownedwnd.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/nonownedwnd.cpp
   3 // Purpose:     wxGTK implementation of wxNonOwnedWindow.
   4 // Author:      Vadim Zeitlin
   5 // Created:     2011-10-12
   6 // RCS-ID:      $Id: wxhead.cpp,v 1.11 2010-04-22 12:44:51 zeitlin Exp $
   7 // Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
   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 #ifndef WX_PRECOMP
  27     #include "wx/frame.h"           // Just for wxFRAME_SHAPED.
  28     #include "wx/nonownedwnd.h"
  29     #include "wx/region.h"
  30 #endif // WX_PRECOMP
  31
  32 #include "wx/gtk/private.h"
  33
  34 #include <gdk/gdk.h>
  35
  36 namespace
  37 {
  38
  39 // helper
  40 bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
  41 {
  42     if (window)
  43     {
  44         if (region.IsEmpty())
  45         {
  46             gdk_window_shape_combine_mask(window, NULL, 0, 0);
  47         }
  48         else
  49         {
  50             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
  51             return true;
  52         }
  53     }
  54     return false;
  55 }
  56
  57 } // anonymous namespace
  58
  59
  60 // ============================================================================
  61 // wxNonOwnedWindow implementation
  62 // ============================================================================
  63
  64 void wxNonOwnedWindow::GTKHandleRealized()
  65 {
  66     wxNonOwnedWindowBase::GTKHandleRealized();
  67
  68     if (HasFlag(wxFRAME_SHAPED))
  69         SetShape(m_shape);
  70 }
  71
  72 bool wxNonOwnedWindow::SetShape(const wxRegion& region)
  73 {
  74     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
  75                  wxT("Shaped windows must be created with the wxFRAME_SHAPED style."));
  76
  77     if ( gtk_widget_get_realized(m_widget) )
  78     {
  79         if ( m_wxwindow )
  80             do_shape_combine_region(gtk_widget_get_window(m_wxwindow), region);
  81
  82         return do_shape_combine_region(gtk_widget_get_window(m_widget), region);
  83     }
  84     else // not realized yet
  85     {
  86         // store the shape to set, it will be really set once we're realized
  87         m_shape = region;
  88
  89         // we don't know if we're going to succeed or fail, be optimistic by
  90         // default
  91         return true;
  92     }
  93 }