PortCreateEdgeMode.java |
1 /**************************************************************************** 2 * This demo file is part of yFiles for Java 2.14. 3 * Copyright (c) 2000-2017 by yWorks GmbH, Vor dem Kreuzberg 28, 4 * 72070 Tuebingen, Germany. All rights reserved. 5 * 6 * yFiles demo files exhibit yFiles for Java functionalities. Any redistribution 7 * of demo files in source code or binary form, with or without 8 * modification, is not permitted. 9 * 10 * Owners of a valid software license for a yFiles for Java version that this 11 * demo is shipped with are allowed to use the demo source code as basis 12 * for their own yFiles for Java powered applications. Use of such programs is 13 * governed by the rights and conditions as set out in the yFiles for Java 14 * license agreement. 15 * 16 * THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 19 * NO EVENT SHALL yWorks BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 23 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 24 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 ***************************************************************************/ 28 package demo.view.advanced.ports; 29 30 import y.base.Node; 31 import y.view.CreateEdgeMode; 32 33 /** 34 * Custom <code>CreateEdgeMode</code> implementation that restricts edge 35 * creation to nodes with node ports. 36 * 37 */ 38 class PortCreateEdgeMode extends CreateEdgeMode { 39 /** 40 * Overwritten to accept only nodes with node ports. 41 * @param source the node to check. 42 * @param x the x-coordinate of the mouse event that triggered edge creation 43 * for the specified node. 44 * @param y the y-coordinate of the mouse event that triggered edge creation 45 * for the specified node. 46 * @return <code>true<code> if the specified node has node ports; 47 * <code>false</code> otherwise. 48 */ 49 protected boolean acceptSourceNode( final Node source, final double x, final double y ) { 50 return hasPorts(source); 51 } 52 53 /** 54 * Overwritten to accept only nodes with node ports. 55 * @param target the node to check. 56 * @param x the x-coordinate of the mouse event that triggered edge creation 57 * for the specified node. 58 * @param y the y-coordinate of the mouse event that triggered edge creation 59 * for the specified node. 60 * @return <code>true<code> if the specified node has node ports; 61 * <code>false</code> otherwise. 62 */ 63 protected boolean acceptTargetNode( final Node target, final double x, final double y ) { 64 return hasPorts(target); 65 } 66 67 private boolean hasPorts( final Node node ) { 68 return view.getGraph2D().getRealizer(node).portCount() > 0; 69 } 70 } 71