Add a Help entry in the menu (to point to the wiki)

tuhigui/application.py

@@ -35,7 +35,9 @@ class Application(Gtk.Application):
         window.present()
 
     def _build_app_menu(self):
-        actions = [('about', self._about), ('quit', self._quit)]
+        actions = [('about', self._about),
+                   ('quit', self._quit),
+                   ('help', self._help)]
         for (name, callback) in actions:
             action = Gio.SimpleAction.new(name, None)
             action.connect('activate', callback)
@@ -52,3 +54,7 @@ class Application(Gtk.Application):
         windows = self.get_windows()
         for window in windows:
             window.destroy()
+
+    def _help(self, action, param):
+        import time
+        Gtk.show_uri(None, 'https://github.com/tuhiproject/tuhi/wiki', time.time())

tuhigui/window.py

@@ -29,10 +29,18 @@ MENU_XML = """
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <menu id="primary-menu">
+  <section>
+      <item>
+        <attribute name="label">Help</attribute>
+        <attribute name="action">app.help</attribute>
+      </item>
+    </section>
+    <section>
       <item>
         <attribute name="label">About</attribute>
         <attribute name="action">app.about</attribute>
       </item>
+    </section>
   </menu>
 </interface>
 """