refactor: derive from EventEmitter

Instead of using the legacy import and adding signal methods, just
derive from EventEmitter.

appIcons.js

@@ -38,6 +38,7 @@ import * as Main from 'resource:///org/gnome/shell/ui/main.js';
 import * as PopupMenu from 'resource:///org/gnome/shell/ui/popupMenu.js';
 import * as Util from 'resource:///org/gnome/shell/misc/util.js';
 import * as BoxPointer from 'resource:///org/gnome/shell/ui/boxpointer.js';
+import {EventEmitter} from 'resource:///org/gnome/shell/misc/signals.js';
 
 import * as Utils from './utils.js';
 import * as PanelSettings from './panelSettings.js';
@@ -47,7 +48,6 @@ import {DTP_EXTENSION, SETTINGS, DESKTOPSETTINGS, EXTENSION_PATH} from './extens
 import {gettext as _} from 'resource:///org/gnome/shell/extensions/extension.js';
 
 const Mainloop = imports.mainloop;
-const {signals: Signals} = imports;
 
 //timeout names
 const T2 = 'mouseScrollTimeout';
@@ -1581,9 +1581,11 @@ export function ItemShowLabel() {
  * use of this class in place of the original showAppsButton.
  *
  */
-export const ShowAppsIconWrapper = class {
+export const ShowAppsIconWrapper = class extends EventEmitter {
 
     constructor(dtpPanel) {
+        super();
+
         this.realShowAppsIcon = new Dash.ShowAppsIcon();
 
         /* the variable equivalent to toggleButton has a different name in the appIcon class
@@ -1725,7 +1727,6 @@ export const ShowAppsIconWrapper = class {
         this.realShowAppsIcon.destroy();
     }
 };
-Signals.addSignalMethods(ShowAppsIconWrapper.prototype);
 
 /**
  * A menu for the showAppsIcon

extension.js

@@ -18,16 +18,16 @@
  */
 
 
-import * as Main from 'resource:///org/gnome/shell/ui/main.js';
 import Gio from 'gi://Gio';
 
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import {EventEmitter} from 'resource:///org/gnome/shell/misc/signals.js';
+import {Extension, gettext as _} from 'resource:///org/gnome/shell/extensions/extension.js';
+
 import * as  PanelManager from './panelManager.js';
 import * as Utils from './utils.js';
 import * as AppIcons from './appIcons.js';
 
-import {Extension, gettext as _} from 'resource:///org/gnome/shell/extensions/extension.js';
-
-const {signals: Signals} = imports;
 
 const UBUNTU_DOCK_UUID = 'ubuntu-dock@ubuntu.com';
 
@@ -67,8 +67,7 @@ export default class DashToPanelExtension extends Extension {
         });
 
         //create a global object that can emit signals and conveniently expose functionalities to other extensions 
-        global.dashToPanel = {};
-        Signals.addSignalMethods(global.dashToPanel);
+        global.dashToPanel = new EventEmitter();
         
         _enable(this);
     }

progress.js

@@ -27,12 +27,14 @@ import St from 'gi://St';
 import * as Utils from './utils.js';
 import {SETTINGS} from './extension.js';
 
-const {signals: Signals} = imports;
+import {EventEmitter} from 'resource:///org/gnome/shell/misc/signals.js';
 
 
-export const ProgressManager = class {
+export const ProgressManager = class extends EventEmitter {
 
     constructor() {
+        super();
+
         this._entriesByDBusName = {};
 
         this._launcher_entry_dbus_signal_id =
@@ -163,11 +165,12 @@ export const ProgressManager = class {
         }
     }
 };
-Signals.addSignalMethods(ProgressManager.prototype);
 
-export class AppProgress {
+export class AppProgress extends EventEmitter {
 
     constructor(dbusName, appId, properties) {
+        super();
+
         this._dbusName = dbusName;
         this._appId = appId;
         this._count = 0;
@@ -278,7 +281,6 @@ export class AppProgress {
         }
     }
 };
-Signals.addSignalMethods(AppProgress.prototype);
 
 
 export const ProgressIndicator = class {

taskbar.js

@@ -34,6 +34,7 @@ import * as AppFavorites from 'resource:///org/gnome/shell/ui/appFavorites.js';
 import * as Dash from 'resource:///org/gnome/shell/ui/dash.js';
 import * as DND from 'resource:///org/gnome/shell/ui/dnd.js';
 import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import {EventEmitter} from 'resource:///org/gnome/shell/misc/signals.js';
 
 import * as AppIcons from './appIcons.js';
 import * as PanelManager from './panelManager.js';
@@ -44,7 +45,6 @@ import * as WindowPreview from './windowPreview.js';
 import {SETTINGS} from './extension.js';
 
 const Mainloop = imports.mainloop;
-const {signals: Signals} = imports;
 const SearchController = Main.overview.searchController;
 
 export const DASH_ANIMATION_TIME = Dash.DASH_ANIMATION_TIME / (Dash.DASH_ANIMATION_TIME > 1 ? 1000 : 1);
@@ -194,9 +194,11 @@ export const TaskbarActor = GObject.registerClass({
  * - Sync minimization application target position.
  */
 
-export const Taskbar = class {
+export const Taskbar = class extends EventEmitter {
 
     constructor(panel) {
+        super();
+
         this.dtpPanel = panel;
         
         // start at smallest size due to running indicator drawing area expanding but not shrinking
@@ -1321,8 +1323,6 @@ export const Taskbar = class {
     }
 };
 
-Signals.addSignalMethods(Taskbar.prototype);
-
 const CloneContainerConstraint = GObject.registerClass({
 }, class CloneContainerConstraint extends Clutter.BindConstraint {