FlowchartLoopLimitPainter.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.flowchart.painters; 29 30 import y.view.NodeRealizer; 31 32 import java.awt.Shape; 33 import java.awt.geom.GeneralPath; 34 35 /** 36 * Draws the loop limit symbol of flowchart diagrams. 37 */ 38 public class FlowchartLoopLimitPainter extends AbstractFlowchartPainter { 39 40 /** 41 * Determines if this painter will paint a flowchart loop start symbol 42 * or a flowchart loop end symbol. 43 */ 44 private final boolean isLoopStart; 45 46 /** 47 * Initializes a new <code>FlowchartLoopLimitPainter</code> instance 48 * for loop start visualization. 49 */ 50 public FlowchartLoopLimitPainter() { 51 this(true); 52 } 53 54 /** 55 * Initializes a new <code>FlowchartLoopLimitPainter</code> instance 56 * for loop start or loop end visualization. 57 * @param isStart if <code>true</code>, this painter will paint the flowchart 58 * loop start symbol; otherwise it will paint the flowchart loop end symbol. 59 */ 60 public FlowchartLoopLimitPainter(boolean isStart) { 61 this.isLoopStart = isStart; 62 } 63 64 protected Shape newShape( NodeRealizer context ) { 65 double height = context.getHeight(); 66 double width = context.getWidth(); 67 double x = context.getX(); 68 double y = context.getY(); 69 double borderDistance = Math.min(Math.min(10, width/2), height/2); 70 71 GeneralPath shape = new GeneralPath(); 72 if (isLoopStart) { 73 shape.moveTo((float)(x + borderDistance), (float)y); 74 shape.lineTo((float)(x + width - borderDistance), (float)y); 75 shape.lineTo((float)(x+ width), (float)(y + borderDistance)); 76 shape.lineTo((float)(x + width), (float)(y + height)); 77 shape.lineTo((float)x, (float)(y + height)); 78 shape.lineTo((float)x, (float)(y + borderDistance)); 79 shape.closePath(); 80 } else { //is loop end 81 shape.moveTo((float) x, (float) y); 82 shape.lineTo((float)(x + width), (float) y); 83 shape.lineTo((float)(x + width), (float)(y + height - borderDistance)); 84 shape.lineTo((float)(x + width - borderDistance), (float)(y + height)); 85 shape.lineTo((float)(x + borderDistance), (float)(y + height)); 86 shape.lineTo((float) x, (float)(y + height -borderDistance)); 87 shape.closePath(); 88 } 89 return shape; 90 } 91 } 92