1 /* 2 * Copyright (c) 2010, 2015, 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.ComboBoxBase; 30 import javafx.scene.control.SelectionModel; 31 import com.sun.javafx.scene.control.inputmap.InputMap; 32 33 import static javafx.scene.input.KeyCode.DOWN; 34 import static javafx.scene.input.KeyCode.UP; 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); 49 50 // Add these bindings as a child input map, so they take precedence 51 InputMap<ComboBoxBase<T>> comboBoxListViewInputMap = new InputMap<>(comboBox); 52 comboBoxListViewInputMap.getMappings().addAll( 53 new InputMap.KeyMapping(UP, e -> selectPrevious()), 54 new InputMap.KeyMapping(DOWN, e -> selectNext()) 55 ); 56 addDefaultChildMap(getInputMap(), comboBoxListViewInputMap); 57 } 58 59 /*************************************************************************** 60 * * 61 * Key event handling * 62 * * 63 **************************************************************************/ 64 65 private ComboBox<T> getComboBox() { 66 return (ComboBox<T>) getNode(); 67 } 68 69 private void selectPrevious() { 70 SelectionModel<T> sm = getComboBox().getSelectionModel(); 71 if (sm == null) return; 72 sm.selectPrevious(); 73 } 74 75 private void selectNext() { 76 SelectionModel<T> sm = getComboBox().getSelectionModel(); 77 if (sm == null) return; 78 sm.selectNext(); 79 } 80 }