Prevent replacing the main area widget

5 years ago · 1cd6be4474
parent a3dffc430c
commit 1cd6be4474
1 changed files with 4 additions and 3 deletions
--- a/packages/application/src/shell.ts
+++ b/packages/application/src/shell.ts
@ -101,9 +101,10 @@ export class ClassicShell extends Widget implements JupyterFrontEnd.IShell {
    if (area === 'menu') {
      return this._menuHandler.addWidget(widget, rank);
    }
-    this._main.widgets.forEach(w => {
-      w.close();
-    });
+    if (this._main.widgets.length > 0) {
+      // do not add the widget if there is already one
+      return;
+    }
    this._main.addWidget(widget);
    this._main.update();
    this._currentChanged.emit(void 0);