use gtk_show_uri() in wxLaunchDefaultBrowser() implementation for GTK+

src/unix/utilsx11.cpp

@@ -36,10 +36,11 @@
 #endif
 
 #ifdef __WXGTK__
-#include <gdk/gdk.h>
+#include <gtk/gtk.h>
 #ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
 #endif
+GdkWindow* wxGetTopLevelGDK();
 #endif
 
 // Only X11 backend is supported for wxGTK here
@@ -2609,6 +2610,19 @@ bool wxDoLaunchDefaultBrowser(const wxString& url, int flags)
 {
     wxUnusedVar(flags);
 
+#ifdef __WXGTK__
+#if GTK_CHECK_VERSION(2,14,0)
+#ifndef __WXGTK3__
+    if (gtk_check_version(2,14,0) == NULL)
+#endif
+    {
+        GdkScreen* screen = gdk_window_get_screen(wxGetTopLevelGDK());
+        if (gtk_show_uri(screen, url.utf8_str(), GDK_CURRENT_TIME, NULL))
+            return true;
+    }
+#endif // GTK_CHECK_VERSION(2,14,0)
+#endif // __WXGTK__
+
     // Our best best is to use xdg-open from freedesktop.org cross-desktop
     // compatibility suite xdg-utils
     // (see http://portland.freedesktop.org/wiki/) -- this is installed on