From 07b1a1d6a08e2e8f9299c9bbed46271c614aae32 Mon Sep 17 00:00:00 2001
From: Paul Cornett <paulcor@bullseye.com>
Date: Tue, 15 Apr 2014 16:07:44 +0000
Subject: [PATCH] use gtk_window_set_opacity() in SetTransparent() when GTK >=
 2.12

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76349 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/gtk/toplevel.cpp | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/gtk/toplevel.cpp b/src/gtk/toplevel.cpp
index cd6f9e72e1..71ee5e8558 100644
--- a/src/gtk/toplevel.cpp
+++ b/src/gtk/toplevel.cpp
@@ -1519,17 +1519,26 @@ void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
 
 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
 {
-    GdkWindow* window = NULL;
-    if (m_widget)
-        window = gtk_widget_get_window(m_widget);
+    if (m_widget == NULL)
+        return false;
+#if GTK_CHECK_VERSION(2,12,0)
+#ifndef __WXGTK3__
+    if (gtk_check_version(2,12,0) == NULL)
+#endif
+    {
+        gtk_window_set_opacity(GTK_WINDOW(m_widget), alpha / 255.0);
+        return true;
+    }
+#endif // GTK_CHECK_VERSION(2,12,0)
+#ifndef __WXGTK3__
+#ifdef GDK_WINDOWING_X11
+    GdkWindow* window = gtk_widget_get_window(m_widget);
     if (window == NULL)
         return false;
 
-#ifdef GDK_WINDOWING_X11
     Display* dpy = GDK_WINDOW_XDISPLAY(window);
     Window win = GDK_WINDOW_XID(window);
 
-    // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
     if (alpha == 0xff)
         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
     else
@@ -1544,6 +1553,7 @@ bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
 #else // !GDK_WINDOWING_X11
     return false;
 #endif // GDK_WINDOWING_X11 / !GDK_WINDOWING_X11
+#endif // !__WXGTK3__
 }
 
 bool wxTopLevelWindowGTK::CanSetTransparent()