1 /*
   2  * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.scene.control.behavior;
  27 
  28 import javafx.scene.Node;
  29 import javafx.scene.control.FocusModel;
  30 import javafx.scene.control.MultipleSelectionModel;
  31 import javafx.scene.control.TreeCell;
  32 import javafx.scene.control.TreeItem;
  33 import javafx.scene.control.TreeView;
  34 import javafx.scene.input.MouseButton;
  35 
  36 import java.util.Collections;
  37 
  38 public class TreeCellBehavior<T> extends CellBehaviorBase<TreeCell<T>> {
  39 
  40     /***************************************************************************
  41      *                                                                         *
  42      * Constructors                                                            *
  43      *                                                                         *
  44      **************************************************************************/
  45 
  46     public TreeCellBehavior(final TreeCell<T> control) {
  47         super(control, Collections.emptyList());
  48     }
  49 
  50 
  51 
  52     /***************************************************************************
  53      *                                                                         *
  54      * Private implementation                                                  *
  55      *                                                                         *
  56      **************************************************************************/
  57 
  58     @Override
  59     protected MultipleSelectionModel<TreeItem<T>> getSelectionModel() {
  60         return getCellContainer().getSelectionModel();
  61     }
  62 
  63     @Override
  64     protected FocusModel<TreeItem<T>> getFocusModel() {
  65         return getCellContainer().getFocusModel();
  66     }
  67 
  68     @Override
  69     protected TreeView<T> getCellContainer() {
  70         return getControl().getTreeView();
  71     }
  72 
  73     @Override
  74     protected void edit(TreeCell<T> cell) {
  75         TreeItem<T> treeItem = cell == null ? null : cell.getTreeItem();
  76         getCellContainer().edit(treeItem);
  77     }
  78 
  79     @Override
  80     protected void handleClicks(MouseButton button, int clickCount, boolean isAlreadySelected) {
  81         // handle editing, which only occurs with the primary mouse button
  82         TreeItem<T> treeItem = getControl().getTreeItem();
  83         if (button == MouseButton.PRIMARY) {
  84             if (clickCount == 1 && isAlreadySelected) {
  85                 edit(getControl());
  86             } else if (clickCount == 1) {
  87                 // cancel editing
  88                 edit(null);
  89             } else if (clickCount == 2 && treeItem.isLeaf()) {
  90                 // attempt to edit
  91                 edit(getControl());
  92             } else if (clickCount % 2 == 0) {
  93                 // try to expand/collapse branch tree item
  94                 treeItem.setExpanded(! treeItem.isExpanded());
  95             }
  96         }
  97     }
  98 
  99     @Override protected boolean handleDisclosureNode(double x, double y) {
 100         TreeCell<T> treeCell = getControl();
 101         Node disclosureNode = treeCell.getDisclosureNode();
 102         if (disclosureNode != null) {
 103             if (disclosureNode.getBoundsInParent().contains(x, y)) {
 104                 if (treeCell.getTreeItem() != null) {
 105                     treeCell.getTreeItem().setExpanded(! treeCell.getTreeItem().isExpanded());
 106                 }
 107                 return true;
 108             }
 109         }
 110         return false;
 111     }
 112 }