Merge pull request #465 from danielballan/dragable-output-cleanup

Cleanup dragable output area

src/notebook/cells/model.ts

@@ -409,7 +409,6 @@ class CodeCellModel extends CellModel implements ICodeCellModel {
     if (this.isDisposed) {
       return;
     }
-    this._outputs.clear(false);
     this._outputs.dispose();
     this._outputs = null;
     super.dispose();

src/notebook/output-area/widget.ts

@@ -147,7 +147,7 @@ class OutputAreaWidget extends Widget {
     this.layout = new PanelLayout();
   }
 
-  get mirror(): OutputAreaWidget {
+  mirror(): OutputAreaWidget {
     let rendermime = this._rendermime;
     let renderer = this._renderer;
     let widget = new OutputAreaWidget({ rendermime, renderer });
@@ -591,14 +591,15 @@ class OutputGutter extends Widget {
 
     this._drag.mimeData.setData(FACTORY_MIME, () => {
       let output_area = this.parent.parent as OutputAreaWidget;
-      return output_area.mirror;
+      return output_area.mirror();
     });
 
-    // Start the drag and remove the mousemove listener.
+    // Remove mousemove and mouseup listeners and start the drag.
+    document.removeEventListener('mousemove', this, true);
+    document.removeEventListener('mouseup', this, true);
     this._drag.start(clientX, clientY).then(action => {
       this._drag = null;
     });
-    document.removeEventListener('mousemove', this, true);
   }
 
   /**
@@ -851,25 +852,6 @@ class OutputWidget extends Widget {
 }
 
 
-/**
- * A namespace for OutputGutter statics.
- */
-export
-namespace OutputGutter {
-  /**
-   * The options to pass to an `OutputGutter`.
-   */
-  export
-  interface IOptions {
-    /**
-     * The rendermime instance used by the widget.
-     */
-    rendermime: RenderMime<Widget>;
-  }
-}
-
-
-
 /**
  * A namespace for OutputArea statics.
  */