Update the task list on add/remove rather than

rebuilding every time. Note that this is _not_
the real UI. It's just some stuff I put there
because we need the functionality while we
finalize the real design and we figure out
how to implement it.

shell/HomeWindow.py

@@ -42,27 +42,34 @@ class ActivityGrid(gtk.VBox):
 		gtk.VBox.__init__(self)
 		
 		self._home = home
-		self.update()
+		self._buttons = {}
 
-	def _add_all(self):		
 		screen = wnck.screen_get_default()
 		for window in screen.get_windows():
 			if not window.is_skip_tasklist():
-				self.add(window)
+				self._add(window)
+		screen.connect('window_opened', self.__window_opened_cb)
+		screen.connect('window_closed', self.__window_closed_cb)
 
-	def _remove_all(self):
+	def __window_opened_cb(self, screen, window):
-		for child in self.get_children():
+		if not window.is_skip_tasklist():
-			self.remove(child)
+			self._add(window)
 
-	def add(self, window):
+	def __window_closed_cb(self, screen, window):
+		if not window.is_skip_tasklist():
+			self._remove(window)
+	
+	def _remove(self, window):
+		button = self._buttons[window.get_xid()]
+		self.remove(button)
+
+	def _add(self, window):
 		button = gtk.Button(window.get_name())
 		button.connect('clicked', self.__button_clicked_cb, window)
 		self.pack_start(button, False)
 		button.show()
 
-	def update(self):
+		self._buttons[window.get_xid()] = button
-		self._remove_all()
-		self._add_all()
 	
 	def __button_clicked_cb(self, button, window):
 		self._home.activate(window)
@@ -73,16 +80,29 @@ class HomeWindow(gtk.Window):
 		
 		self._shell = shell
 
-		vbox = gtk.VBox()
+		self.set_skip_taskbar_hint(True)
+				
+		vbox = gtk.VBox(False, 6)
+		vbox.set_border_width(24)
 
 		toolbar = Toolbar(self)
 		vbox.pack_start(toolbar, False)
 		toolbar.show()
 
+		label = gtk.Label('Open activities:')
+		label.set_alignment(0.0, 0.5)
+		vbox.pack_start(label, False)
+		label.show()
+		
 		self._grid = ActivityGrid(self)
 		vbox.pack_start(self._grid)
 		self._grid.show()
 
+		label = gtk.Label('Shared activities:')
+		label.set_alignment(0.0, 0.5)
+		vbox.pack_start(label, False)
+		label.show()
+
 		self.add(vbox)
 		vbox.show()
 
@@ -96,7 +116,3 @@ class HomeWindow(gtk.Window):
 	def activate(self, activity_window):
 		activity_window.activate(gtk.get_current_event_time())
 		self.hide()
-
-	def show(self):
-		self._grid.update()
-		gtk.Window.show(self)