[gnome-shell/gbsneto/new-lock-screen-part2: 8/34] screenShield: Move background to Unlock Dialog

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 47cf5aee0453521c1f2483bab1ff057e8774b8e9
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Nov 28 19:16:55 2019 -0300

    screenShield: Move background to Unlock Dialog
    
    In addition to that, remove the ClutterBoxLayout that is set as
    the layout manager of the Unlock Dialog, and apply the primary
    monitor constraint to the child St.BoxLayout instead.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/872

 js/ui/screenShield.js | 39 -------------------------------------
 js/ui/unlockDialog.js | 54 +++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 52 insertions(+), 41 deletions(-)
---
diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index 98433d01cd..933fa1986e 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -4,7 +4,6 @@ const { AccountsService, Clutter, Gio,
         GLib, Graphene, Meta, Shell, St } = imports.gi;
 const Signals = imports.signals;
 
-const Background = imports.ui.background;
 const GnomeSession = imports.misc.gnomeSession;
 const Layout = imports.ui.layout;
 const OVirt = imports.gdm.oVirt;
@@ -76,15 +75,6 @@ var ScreenShield = class {
 
         this._lockScreenGroup.add_actor(this._lockScreenContents);
 
-        this._backgroundGroup = new Clutter.Actor();
-
-        this._lockScreenGroup.add_actor(this._backgroundGroup);
-        this._lockScreenGroup.set_child_below_sibling(this._backgroundGroup, null);
-        this._bgManagers = [];
-
-        this._updateBackgrounds();
-        Main.layoutManager.connect('monitors-changed', this._updateBackgrounds.bind(this));
-
         this._dragAction = new Clutter.GestureAction();
         this._dragAction.connect('gesture-begin', this._onDragBegin.bind(this));
         this._dragAction.connect('gesture-progress', this._onDragMotion.bind(this));
@@ -190,35 +180,6 @@ var ScreenShield = class {
         this._syncInhibitor();
     }
 
-    _createBackground(monitorIndex) {
-        let monitor = Main.layoutManager.monitors[monitorIndex];
-        let widget = new St.Widget({ style_class: 'screen-shield-background',
-                                     x: monitor.x,
-                                     y: monitor.y,
-                                     width: monitor.width,
-                                     height: monitor.height });
-
-        let bgManager = new Background.BackgroundManager({ container: widget,
-                                                           monitorIndex,
-                                                           controlPosition: false,
-                                                           settingsSchema: SCREENSAVER_SCHEMA });
-
-        this._bgManagers.push(bgManager);
-
-        this._backgroundGroup.add_child(widget);
-    }
-
-    _updateBackgrounds() {
-        for (let i = 0; i < this._bgManagers.length; i++)
-            this._bgManagers[i].destroy();
-
-        this._bgManagers = [];
-        this._backgroundGroup.destroy_all_children();
-
-        for (let i = 0; i < Main.layoutManager.monitors.length; i++)
-            this._createBackground(i);
-    }
-
     _liftShield(velocity) {
         if (this._isLocked) {
             if (this._ensureUnlockDialog(true /* allowCancel */))
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index cda612f88f..affc9b365c 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -4,6 +4,7 @@
 const { AccountsService, Atk, Clutter, Gdm, Gio,
         GnomeDesktop, GLib, GObject, Meta, Shell, St } = imports.gi;
 
+const Background = imports.ui.background;
 const Layout = imports.ui.layout;
 const Main = imports.ui.main;
 const MessageTray = imports.ui.messageTray;
@@ -13,6 +14,8 @@ const AuthPrompt = imports.gdm.authPrompt;
 // The timeout before going back automatically to the lock screen (in seconds)
 const IDLE_TIMEOUT = 2 * 60;
 
+const SCREENSAVER_SCHEMA = 'org.gnome.desktop.screensaver';
+
 const SUMMARY_ICON_SIZE = 48;
 
 var NotificationsBox = GObject.registerClass({
@@ -333,13 +336,21 @@ var UnlockDialog = GObject.registerClass({
         super._init({
             accessible_role: Atk.Role.WINDOW,
             style_class: 'login-dialog',
-            layout_manager: new Clutter.BoxLayout(),
             visible: false,
         });
 
-        this.add_constraint(new Layout.MonitorConstraint({ primary: true }));
         parentActor.add_child(this);
 
+        // Background
+        this._backgroundGroup = new Clutter.Actor();
+        this.add_child(this._backgroundGroup);
+
+        this._bgManagers = [];
+
+        this._updateBackgrounds();
+        this._monitorsChangedId =
+            Main.layoutManager.connect('monitors-changed', this._updateBackgrounds.bind(this));
+
         this._userManager = AccountsService.UserManager.get_default();
         this._userName = GLib.get_user_name();
         this._user = this._userManager.get_user(this._userName);
@@ -350,6 +361,7 @@ var UnlockDialog = GObject.registerClass({
                                              x_expand: true,
                                              y_expand: true });
         this.add_child(this._promptBox);
+        this._promptBox.add_constraint(new Layout.MonitorConstraint({ primary: true }));
 
         this._clock = new Clock();
         this._promptBox.add_child(this._clock);
@@ -394,6 +406,39 @@ var UnlockDialog = GObject.registerClass({
         this.connect('destroy', this._onDestroy.bind(this));
     }
 
+    _createBackground(monitorIndex) {
+        let monitor = Main.layoutManager.monitors[monitorIndex];
+        let widget = new St.Widget({
+            style_class: 'screen-shield-background',
+            x: monitor.x,
+            y: monitor.y,
+            width: monitor.width,
+            height: monitor.height,
+        });
+
+        let bgManager = new Background.BackgroundManager({
+            container: widget,
+            monitorIndex,
+            controlPosition: false,
+            settingsSchema: SCREENSAVER_SCHEMA,
+        });
+
+        this._bgManagers.push(bgManager);
+
+        this._backgroundGroup.add_child(widget);
+    }
+
+    _updateBackgrounds() {
+        for (let i = 0; i < this._bgManagers.length; i++)
+            this._bgManagers[i].destroy();
+
+        this._bgManagers = [];
+        this._backgroundGroup.destroy_all_children();
+
+        for (let i = 0; i < Main.layoutManager.monitors.length; i++)
+            this._createBackground(i);
+    }
+
     _updateSensitivity(sensitive) {
         this._authPrompt.updateSensitivity(sensitive);
 
@@ -437,6 +482,11 @@ var UnlockDialog = GObject.registerClass({
             this._idleMonitor.remove_watch(this._idleWatchId);
             this._idleWatchId = 0;
         }
+
+        if (this._monitorsChangedId) {
+            Main.layoutManager.disconnect(this._monitorsChangedId);
+            delete this._monitorsChangedId;
+        }
     }
 
     cancel() {