Delays initialization until Main.panel.statusArea.quickSettings._system is available

Author: lobothiago

extension.js

@@ -363,59 +363,66 @@ export default class MyExtension extends Extension {
     }
 
     enable() {
-        this._setting = this.getSettings()
-        this._checkRequirements();
-        this._loginManager = LoginManager.getLoginManager();
-        this.systemMenu = Main.panel.statusArea.quickSettings._system;
-
-        this._hibernateMenuItem = new PopupMenu.PopupMenuItem(__('Hibernate'));
-        this._hibernateMenuItemId = this._hibernateMenuItem.connect(
-            'activate',
-            () => this._onHibernateClicked()
-        );
-
-        this._hybridSleepMenuItem = new PopupMenu.PopupMenuItem(
-            __('Hybrid Sleep')
-        );
-        this._hybridSleepMenuItemId = this._hybridSleepMenuItem.connect(
-            'activate',
-            () => this._onHybridSleepClicked()
-        );
-
-        this._suspendThenHibernateMenuItem = new PopupMenu.PopupMenuItem(
-            __('Suspend then Hibernate')
-        );
-        this._suspendThenHibernateMenuItemId = this._suspendThenHibernateMenuItem.connect(
-            'activate',
-            () => this._onSuspendThenHibernateClicked()
-        );
-
-        let afterSuspendPosition =
-            this.systemMenu._systemItem.menu.numMenuItems - 5;
-
-        this.systemMenu._systemItem.menu.addMenuItem(
-            this._hybridSleepMenuItem,
-            afterSuspendPosition
-        );
-        this.systemMenu._systemItem.menu.addMenuItem(
-            this._hibernateMenuItem,
-            afterSuspendPosition
-        );
-        this.systemMenu._systemItem.menu.addMenuItem(
-            this._suspendThenHibernateMenuItem,
-            afterSuspendPosition
-        );
-
-        this._menuOpenStateChangedId = this.systemMenu._systemItem.menu.connect(
-            'open-state-changed',
-            (menu, open) => {
-                if (!open) return;
-                this._updateDefaults();
-                this._updateHaveHibernate();
-                this._updateHaveHybridSleep();
-                this._updateHaveSuspendThenHibernate();
+        var self = this;
+        
+        let poller = setInterval(() => {
+            if (Main.panel.statusArea.quickSettings._system) {
+                self._setting = self.getSettings()
+                self._checkRequirements();
+                self._loginManager = LoginManager.getLoginManager();
+                self.systemMenu = Main.panel.statusArea.quickSettings._system;
+                self._hibernateMenuItem = new PopupMenu.PopupMenuItem(__('Hibernate'));
+                self._hibernateMenuItemId = self._hibernateMenuItem.connect(
+                    'activate',
+                    () => self._onHibernateClicked()
+                );
+        
+                self._hybridSleepMenuItem = new PopupMenu.PopupMenuItem(
+                    __('Hybrid Sleep')
+                );
+                self._hybridSleepMenuItemId = self._hybridSleepMenuItem.connect(
+                    'activate',
+                    () => self._onHybridSleepClicked()
+                );
+        
+                self._suspendThenHibernateMenuItem = new PopupMenu.PopupMenuItem(
+                    __('Suspend then Hibernate')
+                );
+                self._suspendThenHibernateMenuItemId = self._suspendThenHibernateMenuItem.connect(
+                    'activate',
+                    () => self._onSuspendThenHibernateClicked()
+                );
+        
+                let afterSuspendPosition =
+                    self.systemMenu._systemItem.menu.numMenuItems - 5;
+        
+                self.systemMenu._systemItem.menu.addMenuItem(
+                    self._hybridSleepMenuItem,
+                    afterSuspendPosition
+                );
+                self.systemMenu._systemItem.menu.addMenuItem(
+                    self._hibernateMenuItem,
+                    afterSuspendPosition
+                );
+                self.systemMenu._systemItem.menu.addMenuItem(
+                    self._suspendThenHibernateMenuItem,
+                    afterSuspendPosition
+                );
+        
+                self._menuOpenStateChangedId = self.systemMenu._systemItem.menu.connect(
+                    'open-state-changed',
+                    (menu, open) => {
+                        if (!open) return;
+                        self._updateDefaults();
+                        self._updateHaveHibernate();
+                        self._updateHaveHybridSleep();
+                        self._updateHaveSuspendThenHibernate();
+                    }
+                );
+                
+                clearInterval(poller);
             }
-        );
+        }, 50);
     }
 
     disable() {