implemented freedesktop.org spec support for GTK version of wxTaskBarIcon

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27544 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/taskbar.cpp

@@ -0,0 +1,65 @@
+/////////////////////////////////////////////////////////////////////////
+// File:        taskbar.cpp
+// Purpose:     wxTaskBarIcon (src/unix/taskbarx11.cpp) helper for GTK2
+// Author:      Vaclav Slavik
+// Modified by:
+// Created:     2004/05/29
+// RCS-ID:      $Id$
+// Copyright:   (c) Vaclav Slavik, 2004
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////
+
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+#pragma implementation "taskbarpriv.h"
+#endif
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#include "wx/log.h"
+#include "wx/frame.h"
+
+#ifdef __WXGTK20__
+
+#include "wx/gtk/taskbarpriv.h"
+#include "eggtrayicon.h"
+
+wxTaskBarIconAreaBase::wxTaskBarIconAreaBase()
+{
+    if (IsProtocolSupported())
+    {
+        m_widget = GTK_WIDGET(egg_tray_icon_new("systray icon"));
+        gtk_window_set_resizable(GTK_WINDOW(m_widget), false);
+        
+        wxLogTrace(_T("systray"), _T("using freedesktop.org systray spec"));
+    }
+    
+    wxTopLevelWindow::Create(
+            NULL, wxID_ANY, _T("systray icon"),
+            wxDefaultPosition, wxDefaultSize,
+            wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR | wxSIMPLE_BORDER |
+            wxFRAME_SHAPED,
+            wxEmptyString /*eggtray doesn't like setting wmclass*/);
+}
+
+bool wxTaskBarIconAreaBase::IsProtocolSupported()
+{
+    static int s_supported = -1;
+    if (s_supported == -1)
+    {
+        Display *display = GDK_DISPLAY();
+        Screen *screen = DefaultScreenOfDisplay(display);
+    
+        wxString name;
+        name.Printf(_T("_NET_SYSTEM_TRAY_S%d"), XScreenNumberOfScreen(screen));
+        Atom atom = XInternAtom(display, name.ToAscii(), False);
+        
+        Window manager = XGetSelectionOwner(display, atom);
+        
+        s_supported = (manager != None);
+    }
+    
+    return (bool)s_supported;
+}
+
+#endif // __WXGTK20__