Use GtkShortcutsWindow to display keyboard shortcuts.

src/roster_window.py

@@ -56,6 +56,7 @@ import tooltips
 import message_control
 import adhoc_commands
 import features_window
+import shortcuts_window
 import plugins
 import plugins.gui
 
@@ -3852,8 +3853,7 @@ class RosterWindow:
             'http://trac.gajim.org/wiki/GajimFaq')
 
     def on_keyboard_shortcuts_menuitem_activate(self, widget):
-        helpers.launch_browser_mailer('url',
-            'http://trac.gajim.org/wiki/KeyboardShortcuts')
+        shortcuts_window.show(self.window)
 
     def on_features_menuitem_activate(self, widget):
         features_window.FeaturesWindow()

src/shortcuts_window.py

+# -*- coding:utf-8 -*-
+## src/shortcuts_window.py
+##
+## This file is part of Gajim.
+##
+## Gajim is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published
+## by the Free Software Foundation; version 3 only.
+##
+## Gajim is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+##
+
+import gtkgui_helpers
+
+
+class ShortcutsWindow:
+    def __init__(self):
+        self.window = None
+
+    def show(self, parent=None):
+        if self.window is None:
+            builder = gtkgui_helpers.get_gtk_builder('shortcuts_window.ui')
+            self.window = builder.get_object('shortcuts_window')
+            self.window.connect('destroy', self._on_window_destroy)
+        self.window.set_transient_for(parent)
+        self.window.show_all()
+        self.window.present()
+
+    def _on_window_destroy(self, widget):
+        self.window = None
+
+show = ShortcutsWindow().show