[polari/popover: 2/4] userList: Stop using a stack

[Florian Müllner <fmuellner src gnome org>]

commit 6b7c8b0e77a4433ccd1b3c163fde8d41cad00ec0
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Jan 23 09:00:14 2014 -0500

    userList: Stop using a stack
    
    By using a modal popover, the user list has now become a lot more
    temporary. As a result, there is no longer a need for transitioning
    between different lists on room switches, so we can just add the
    correct list to the popover instead of keeping all lists around in
    a stack. As GtkStack does a rather poor job at not propagating state
    to non-visible children, this speeds up the UI significantly.

 src/userList.js |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)
---
diff --git a/src/userList.js b/src/userList.js
index 8bdb744..70bfb8b 100644
--- a/src/userList.js
+++ b/src/userList.js
@@ -69,10 +69,6 @@ const UserListPopover = new Lang.Class({
             }));
         frame.add(this._entry);
 
-        this._stack = new Gtk.Stack({ hexpand: true, vexpand: true });
-        this._stack.transition_type = Gtk.StackTransitionType.CROSSFADE;
-        this._box.add(this._stack);
-
         this._box.show_all();
     },
 
@@ -83,8 +79,6 @@ const UserListPopover = new Lang.Class({
         let userList = new UserList(room);
         this._rooms[room.id] = userList;
 
-        this._stack.add_named(userList.widget, room.id);
-
         userList.widget.vadjustment.connect('changed',
                                             Lang.bind(this, this._updateEntryVisibility));
     },
@@ -100,12 +94,16 @@ const UserListPopover = new Lang.Class({
         this._entry.text = '';
         this._updateFilter();
 
+        let currentList = this._room ? this._rooms[this._room.id] : null;
+        if (currentList)
+            this._box.remove(currentList.widget);
+
         this._room = room;
 
         if (!room || !this._rooms[room.id])
             return;
 
-        this._stack.set_visible_child_name(room.id);
+        this._box.add(this._rooms[room.id].widget);
         this._updateEntryVisibility();
     },
 
@@ -325,7 +323,7 @@ const UserList = new Lang.Class({
     Name: 'UserList',
 
     _init: function(room) {
-        this.widget = new Gtk.ScrolledWindow();
+        this.widget = new Gtk.ScrolledWindow({ hexpand: true, vexpand: true });
         this.widget.hscrollbar_policy = Gtk.PolicyType.NEVER;
 
         this._list = new Gtk.ListBox();