action to jump back to the top

src/main.py

@@ -62,6 +62,10 @@ class Application(Gtk.Application):
         self.add_action(action)
         self.set_accels_for_action('app.newpost',["<Ctrl>n"])
 
+        action = Gio.SimpleAction.new('top', None)
+        action.connect('activate', self.on_top)
+        self.add_action(action)
+
         action = Gio.SimpleAction.new('refresh', None)
         action.connect('activate', self.on_refresh)
         self.add_action(action)
@@ -196,6 +200,10 @@ class Application(Gtk.Application):
         timeline = self.stack.get_visible_child()
         timeline.emit('refresh')
 
+    def on_top(self, action, param):
+        timeline = self.stack.get_visible_child()
+        timeline.emit('top')
+
     def on_preferences(self, action, param):
         pass
 

src/menu.ui

@@ -2,6 +2,10 @@
 <interface>
 	<menu id="app-menu">
 		<section>
+			<item>
+				<attribute name="action">app.top</attribute>
+				<attribute name="label" translatable="yes">To Top</attribute>
+			</item>
 			<item>
 				<attribute name="action">app.refresh</attribute>
 				<attribute name="label" translatable="yes">Refresh</attribute>

src/widgets.py

@@ -187,6 +187,7 @@ class Timeline(Gtk.Box):
 
     __gsignals__ = {
         'refresh': (GObject.SIGNAL_RUN_FIRST, None, ()),
+        'top': (GObject.SIGNAL_RUN_FIRST, None, ()),
         'reply': (GObject.SIGNAL_RUN_FIRST, None, (int,str,))
     }
 
@@ -197,21 +198,21 @@ class Timeline(Gtk.Box):
         self.max_id = 0
         self.min_id = 0
 
-        scroller = Gtk.ScrolledWindow(
+        self.scroller = Gtk.ScrolledWindow(
             halign='fill',
             kinetic_scrolling=True
         )
         self.view = Gtk.ListBox(
             selection_mode=Gtk.SelectionMode.NONE
         )
-        scroller.add(self.view)
+        self.scroller.add(self.view)
-        self.pack_start(scroller, True, True, 0)
+        self.pack_start(self.scroller, True, True, 0)
 
         self.stream = stream
         self.load_timeline()
 
         self.view.connect('button-press-event', self.on_button_pressed)
-        scroller.connect('edge-reached', self.on_edge_reached)
+        self.scroller.connect('edge-reached', self.on_edge_reached)
 
         action_group = Gio.SimpleActionGroup()
 
@@ -274,12 +275,17 @@ class Timeline(Gtk.Box):
         self.show_all()
 
     def do_refresh(self):
+        self.do_top()
         rows = self.view.get_children()
         for item in rows:
             self.view.remove(item)
         self.load_timeline()
         self.show_all()
 
+    def do_top(self):
+        vadjustment = self.scroller.get_vadjustment()
+        vadjustment.set_value(0)
+
     def on_edge_reached(self, widget, pos):
         if pos == Gtk.PositionType.BOTTOM:
             self.load_timeline(True)