progress

src/public/javascripts/widgets/tab_aware_widget.js

@@ -1,13 +1,21 @@
 import BasicWidget from "./basic_widget.js";
 
 export default class TabAwareWidget extends BasicWidget {
-    constructor(appContext, tabContext = null) {
-        super(appContext);
-
+    setTabContext(tabContext) {
         /** @var {TabContext} */
         this.tabContext = tabContext;
+
+        this.eventReceived('tabNoteSwitched', {tabId: this.tabContext.tabId});
     }
 
+    tabNoteSwitchedListener({tabId}) {
+        if (this.tabContext && tabId === this.tabContext.tabId) {
+            this.noteSwitched();
+        }
+    }
+
+    noteSwitched() {}
+
     // to override
     activeTabChanged() {}