Only account for WM frame extents in tlw size if WM supports _NET_FRAME_EXTENTS. Extents cache no longer needed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50467 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/taskbar.cpp

@@ -14,9 +14,6 @@
 
 #if wxUSE_TASKBARICON
 
-#include <gtk/gtkversion.h>
-#if GTK_CHECK_VERSION(2, 1, 0)
-
 #include "wx/gtk/taskbarpriv.h"
 
 #ifndef WX_PRECOMP
@@ -47,6 +44,16 @@ wxTaskBarIconAreaBase::wxTaskBarIconAreaBase()
             wxFRAME_SHAPED,
             wxEmptyString /*eggtray doesn't like setting wmclass*/);
 
+    // WM frame extents are not useful for wxTaskBarIcon
+    m_deferShow = false;
+    gulong handler_id = g_signal_handler_find(
+        m_widget,
+        GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
+        g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
+        0, NULL, NULL, this);
+    if (handler_id != 0)
+        g_signal_handler_disconnect(m_widget, handler_id);
+
     m_invokingWindow = NULL;
 }
 
@@ -71,13 +78,6 @@ bool wxTaskBarIconAreaBase::IsProtocolSupported()
     return (bool)s_supported;
 }
 
-bool wxTaskBarIconAreaBase::IsDecorCacheable() const
-{
-    // Apparently, WM frame extents extend to full width of screen when window
-    // is in the tray. Don't cache, it's not useful for other windows.
-    return false;
-}
-
 //-----------------------------------------------------------------------------
 // Pop-up menu stuff
 //-----------------------------------------------------------------------------
@@ -150,5 +150,4 @@ bool wxTaskBarIconAreaBase::DoPopupMenu( wxMenu *menu, int x, int y )
 }
 
 #endif // wxUSE_MENUS_NATIVE
-#endif // GTK_CHECK_VERSION(2, 1, 0)
 #endif // wxUSE_TASKBARICON