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fix for GTK assertion from gtk_widget_set_colormap, bug 1882040

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51481 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett 2008-02-01 04:44:57 +00:00
parent f8b3f03601
commit 3780e2523c
1 changed files with 33 additions and 16 deletions
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49
src/gtk/glcanvas.cpp
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@ -100,6 +100,34 @@ gtk_glcanvas_size_callback(GtkWidget *WXUNUSED(widget),
}
}
//-----------------------------------------------------------------------------
// emission hook for "parent-set"
//-----------------------------------------------------------------------------
extern "C" {
static gboolean
parent_set_hook(GSignalInvocationHint*, guint, const GValue* param_values, void* data)
{
wxGLCanvas* win = (wxGLCanvas*)data;
if (g_value_peek_pointer(&param_values[0]) == win->m_wxwindow)
{
const XVisualInfo* xvi = win->GetXVisualInfo();
GdkVisual* visual = gtk_widget_get_visual(win->m_wxwindow);
if (GDK_VISUAL_XVISUAL(visual)->visualid != xvi->visualid)
{
GdkScreen* screen = gtk_widget_get_screen(win->m_wxwindow);
visual = gdk_x11_screen_lookup_visual(screen, xvi->visualid);
GdkColormap* colormap = gdk_colormap_new(visual, false);
gtk_widget_set_colormap(win->m_wxwindow, colormap);
g_object_unref(colormap);
}
// remove hook
return false;
}
return true;
}
}
//---------------------------------------------------------------------------
// wxGlCanvas
//---------------------------------------------------------------------------
@ -186,27 +214,16 @@ bool wxGLCanvas::Create(wxWindow *parent,
if ( !InitVisual(attribList) )
return false;
XVisualInfo * const xvi = GetXVisualInfo();
GdkVisual *visual;
GdkColormap *colormap;
// watch for the "parent-set" signal on m_wxwindow so we can set colormap
// before m_wxwindow is realized (which will occur before
// wxWindow::Create() returns if parent is already visible)
unsigned sig_id = g_signal_lookup("parent-set", GTK_TYPE_WIDGET);
g_signal_add_emission_hook(sig_id, 0, parent_set_hook, this, NULL);
wxWindow::Create( parent, id, pos, size, style, name );
m_glWidget = m_wxwindow;
GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
colormap = gdk_screen_get_default_colormap(screen);
visual = gdk_colormap_get_visual(colormap);
if (GDK_VISUAL_XVISUAL(visual)->visualid != xvi->visualid)
{
visual = gdk_x11_screen_lookup_visual( screen, xvi->visualid );
colormap = gdk_colormap_new(visual, FALSE);
}
gtk_widget_set_colormap( m_glWidget, colormap );
gtk_widget_set_double_buffered( m_glWidget, FALSE );
#if WXWIN_COMPATIBILITY_2_8