feat: ESC key selects parent of selected node (gluonhq#389)

* Implementation for gluonhq#388
* CHG setOnKeyPressed() instead of addEventListener() to handle ESC key
* Update ContentPanelController.java
* Update HierarchyTreeViewController.java

kit/src/main/java/com/oracle/javafx/scenebuilder/kit/editor/panel/content/ContentPanelController.java

@@ -65,6 +65,7 @@
 import javafx.scene.control.TreeTableView;
 import javafx.scene.image.Image;
 import javafx.scene.input.InputEvent;
+import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
 import javafx.scene.layout.Background;
 import javafx.scene.layout.BackgroundImage;
@@ -911,6 +912,20 @@ protected void controllerDidLoadFxml() {
                 = getEditorController().getContextMenuController();
         scrollPane.setContextMenu(contextMenuController.getContextMenu());
 
+        scrollPane.setOnKeyPressed(e -> {
+
+            if (e.getCode() == KeyCode.ESCAPE) {
+                // on ESC we select the parent of current selected item
+                Selection selection = getEditorController().getSelection();
+                FXOMObject parent = selection.getAncestor();
+
+                if (parent != null) {
+                    selection.clear();
+                    selection.select(parent);
+                }
+            }
+        });
+
         // Setup default workspace background
         setWorkspaceBackground(ImageUtils.getImage(getDefaultWorkspaceBackgroundURL()));
     }

kit/src/main/java/com/oracle/javafx/scenebuilder/kit/editor/panel/hierarchy/treeview/HierarchyTreeViewController.java

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2016, 2022 Gluon and/or its affiliates.
  * Copyright (c) 2012, 2014, Oracle and/or its affiliates.
  * All rights reserved. Use is subject to license terms.
  *
@@ -46,11 +47,14 @@
 import javafx.scene.Node;
 import javafx.scene.control.Cell;
 import javafx.scene.control.Control;
+import javafx.scene.control.MultipleSelectionModel;
 import javafx.scene.control.ScrollBar;
 import javafx.scene.control.SelectionMode;
 import javafx.scene.control.TreeCell;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
+import javafx.scene.control.TableView.TableViewSelectionModel;
+import javafx.scene.input.KeyCode;
 
 /**
  * Hierarchy panel controller based on the TreeView control.
@@ -85,6 +89,22 @@ protected void initializePanel() {
         // We do not use the platform editing feature because 
         // editing is started on selection + simple click instead of double click
         treeView.setEditable(false);
+
+        treeView.setOnKeyPressed(event -> {
+
+            if (event.getCode() == KeyCode.ESCAPE) {
+            	// on ESC we select the parent of current selected item
+                MultipleSelectionModel<TreeItem<HierarchyItem>> selectionModel = treeView.getSelectionModel();
+                TreeItem<HierarchyItem> item = selectionModel.getSelectedItem();
+                if (item != null) {
+                    TreeItem<HierarchyItem> parent = item.getParent();
+                    if (parent != null) {
+                        selectionModel.clearSelection();
+                        selectionModel.select(parent);
+                    }
+                }
+            }
+        });
     }
 
     @Override