1 /*
   2  * Copyright (c) 2010, 2013, 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.control.ComboBox;
  29 import javafx.scene.control.SelectionModel;
  30 import java.util.ArrayList;
  31 import java.util.List;
  32 import static javafx.scene.input.KeyCode.DOWN;
  33 import static javafx.scene.input.KeyCode.UP;
  34 import static javafx.scene.input.KeyEvent.KEY_PRESSED;
  35 
  36 public class ComboBoxListViewBehavior<T> extends ComboBoxBaseBehavior<T> {
  37 
  38     /***************************************************************************
  39      *                                                                         *
  40      * Constructors                                                            *
  41      *                                                                         *
  42      **************************************************************************/
  43     
  44     /**
  45      * 
  46      */
  47     public ComboBoxListViewBehavior(final ComboBox<T> comboBox) {
  48         super(comboBox, COMBO_BOX_BINDINGS);
  49     }
  50 
  51     /***************************************************************************
  52      *                                                                         *
  53      * Key event handling                                                      *
  54      *                                                                         *
  55      **************************************************************************/
  56 
  57     protected static final List<KeyBinding> COMBO_BOX_BINDINGS = new ArrayList<KeyBinding>();
  58     static {
  59         COMBO_BOX_BINDINGS.add(new KeyBinding(UP, KEY_PRESSED, "selectPrevious"));
  60         COMBO_BOX_BINDINGS.add(new KeyBinding(DOWN, "selectNext"));
  61         COMBO_BOX_BINDINGS.addAll(COMBO_BOX_BASE_BINDINGS);
  62     }
  63 
  64     @Override protected void callAction(String name) {
  65         if ("selectPrevious".equals(name)) {
  66             selectPrevious();
  67         } else if ("selectNext".equals(name)) {
  68             selectNext();
  69         } else {
  70             super.callAction(name);
  71         }
  72     }
  73     
  74     private ComboBox<T> getComboBox() {
  75         return (ComboBox<T>) getControl();
  76     }
  77 
  78     private void selectPrevious() {
  79         SelectionModel<T> sm = getComboBox().getSelectionModel();
  80         if (sm == null) return;
  81         sm.selectPrevious();
  82     }
  83     
  84     private void selectNext() {
  85         SelectionModel<T> sm = getComboBox().getSelectionModel();
  86         if (sm == null) return;
  87         sm.selectNext();
  88     }
  89 }