[gnome-shell] unlockDialog: Remove clutter constraints from the code

[Jasper St. Pierre <jstpierre src gnome org>]

commit 1f50f4658d71995bbc3db873a47b4ba09b34d0e8
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Aug 26 15:43:27 2013 -0400

    unlockDialog: Remove clutter constraints from the code
    
    These cause annoying allocation cycle warnings, and it's simpler to
    just express our desired layout in terms of nested containers.
    Adapt the theme to match as well.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706843

 data/theme/gnome-shell.css |    8 --------
 js/ui/unlockDialog.js      |   10 ++++++----
 2 files changed, 6 insertions(+), 12 deletions(-)
---
diff --git a/data/theme/gnome-shell.css b/data/theme/gnome-shell.css
index 822401d..683e303 100644
--- a/data/theme/gnome-shell.css
+++ b/data/theme/gnome-shell.css
@@ -2258,14 +2258,6 @@ StScrollBar StButton#vhandle:active {
     /* Reset border and background */
     border: none;
     background-color: transparent;
-
-    padding-bottom: 80px;
-    padding-top: 80px;
-
-    border-radius: 16px;
-    min-height: 150px;
-    max-height: 700px;
-    min-width: 350px;
 }
 
 .login-dialog-button-box {
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index b0d342b..d43df83 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -34,6 +34,7 @@ const UnlockDialog = new Lang.Class({
     _init: function(parentActor) {
         this.actor = new St.Widget({ accessible_role: Atk.Role.WINDOW,
                                      style_class: 'login-dialog',
+                                     layout_manager: new Clutter.BoxLayout(),
                                      visible: false });
 
         this.actor.add_constraint(new Layout.MonitorConstraint({ primary: true }));
@@ -43,11 +44,12 @@ const UnlockDialog = new Lang.Class({
         this._userName = GLib.get_user_name();
         this._user = this._userManager.get_user(this._userName);
 
-        this._promptBox = new St.BoxLayout({ vertical: true });
+        this._promptBox = new St.BoxLayout({ vertical: true,
+                                             x_align: Clutter.ActorAlign.CENTER,
+                                             y_align: Clutter.ActorAlign.CENTER,
+                                             x_expand: true,
+                                             y_expand: true });
         this.actor.add_child(this._promptBox);
-        this._promptBox.add_constraint(new Clutter.AlignConstraint({ source: this.actor,
-                                                                     align_axis: Clutter.AlignAxis.BOTH,
-                                                                     factor: 0.5 }));
 
         this._authPrompt = new AuthPrompt.AuthPrompt(new Gdm.Client(), 
AuthPrompt.AuthPromptMode.UNLOCK_ONLY);
         this._authPrompt.connect('failed', Lang.bind(this, this._fail));