1 /* 2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. 3 * All rights reserved. Use is subject to license terms. 4 * 5 * This file is available and licensed under the following license: 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * - Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the distribution. 16 * - Neither the name of Oracle Corporation nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 package com.oracle.javafx.scenebuilder.kit.editor.panel.content.gesture.mouse; 33 34 import com.oracle.javafx.scenebuilder.kit.editor.panel.content.ContentPanelController; 35 import com.oracle.javafx.scenebuilder.kit.editor.panel.content.gesture.AbstractGesture; 36 37 import javafx.scene.Node; 38 import javafx.scene.input.InputEvent; 39 import javafx.scene.input.MouseEvent; 40 41 /** 42 * 43 * 44 */ 45 public abstract class AbstractMouseDragGesture extends AbstractGesture { 46 47 48 private Observer observer; 49 private Node eventTarget; 50 51 public AbstractMouseDragGesture(ContentPanelController contentPanelController) { 52 super(contentPanelController); 53 } 54 55 56 protected abstract void mousePressed(MouseEvent e); 57 protected abstract void mouseDragDetected(MouseEvent e); 58 protected abstract void mouseReleased(MouseEvent e); 59 protected abstract void mouseExited(MouseEvent e); 60 61 /* 62 * AbstractGesture 63 */ 64 65 @Override 66 public void start(InputEvent e, Observer observer) { 67 assert e != null; 68 assert e instanceof MouseEvent; 69 assert e.getEventType() == MouseEvent.MOUSE_PRESSED; 70 assert e.getTarget() instanceof Node; 71 assert observer != null; 72 73 this.observer = observer; 74 this.eventTarget = (Node) e.getTarget(); 75 76 assert eventTarget.getOnDragDetected() == null; 77 assert eventTarget.getOnMouseReleased() == null; 78 assert eventTarget.getOnMouseExited() == null; 79 80 eventTarget.setOnDragDetected(e1 -> { 81 try { 82 mouseDragDetected(e1); 83 } finally { 84 performTermination(); 85 } 86 }); 87 eventTarget.setOnMouseReleased(e1 -> { 88 try { 89 mouseReleased(e1); 90 } finally { 91 performTermination(); 92 } 93 }); 94 eventTarget.setOnMouseExited(e1 -> { 95 try { 96 mouseExited(e1); 97 } finally { 98 performTermination(); 99 } 100 }); 101 102 try { 103 mousePressed((MouseEvent) e); 104 } catch(RuntimeException x) { 105 performTermination(); 106 throw x; 107 } 108 } 109 110 111 /* 112 * Private 113 */ 114 115 private void performTermination() { 116 eventTarget.setOnDragDetected(null); 117 eventTarget.setOnMouseReleased(null); 118 eventTarget.setOnMouseExited(null); 119 120 try { 121 observer.gestureDidTerminate(this); 122 } finally { 123 observer = null; 124 eventTarget = null; 125 } 126 } 127 128 }