start of the refactoring to widget system

src/public/javascripts/services/app_context.js

@@ -0,0 +1,33 @@
+import GlobalButtonsWidget from "../widgets/global_buttons.js";
+import SearchBoxWidget from "../widgets/search_box.js";
+import SearchResultsWidget from "../widgets/search_results.js";
+import NoteTreeWidget from "../widgets/note_tree.js";
+
+export default class AppContext {
+    constructor() {
+        this.widgets = [];
+    }
+
+    trigger(name, data) {
+        for (const widget of this.widgets) {
+            widget.eventReceived(name, data);
+        }
+    }
+
+    showWidgets() {
+        const $leftPane = $("#left-pane");
+
+        this.widgets = [
+            new GlobalButtonsWidget(this),
+            new SearchBoxWidget(this),
+            new SearchResultsWidget(this),
+            new NoteTreeWidget(this)
+        ];
+
+        for (const widget of this.widgets) {
+            const $widget = widget.render();
+
+            $leftPane.append($widget);
+        }
+    }
+}