001/* 002 * SVG Salamander 003 * Copyright (c) 2004, Mark McKay 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or 007 * without modification, are permitted provided that the following 008 * conditions are met: 009 * 010 * - Redistributions of source code must retain the above 011 * copyright notice, this list of conditions and the following 012 * disclaimer. 013 * - Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials 016 * provided with the distribution. 017 * 018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 029 * OF THE POSSIBILITY OF SUCH DAMAGE. 030 * 031 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other 032 * projects can be found at http://www.kitfox.com 033 * 034 * Created on January 26, 2004, 9:00 AM 035 */ 036package com.kitfox.svg; 037 038import com.kitfox.svg.xml.StyleAttribute; 039import java.awt.Shape; 040import java.awt.geom.AffineTransform; 041import java.awt.geom.Rectangle2D; 042 043/** 044 * Maintains bounding box for this element 045 * 046 * @author Mark McKay 047 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a> 048 */ 049abstract public class TransformableElement extends SVGElement 050{ 051 AffineTransform xform = null; 052 053 /** 054 * Creates a new instance of BoundedElement 055 */ 056 public TransformableElement() 057 { 058 } 059 060 public TransformableElement(String id, SVGElement parent) 061 { 062 super(id, parent); 063 } 064 065 /** 066 * Fetches a copy of the cached AffineTransform. Note that this value will 067 * only be valid after the node has been updated. 068 * 069 * @return 070 */ 071 public AffineTransform getXForm() 072 { 073 return xform == null ? null : new AffineTransform(xform); 074 } 075 /* 076 public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent) 077 { 078 //Load style string 079 super.loaderStartElement(helper, attrs, parent); 080 081 String transform = attrs.getValue("transform"); 082 if (transform != null) 083 { 084 xform = parseTransform(transform); 085 } 086 } 087 */ 088 089 protected void build() throws SVGException 090 { 091 super.build(); 092 093 StyleAttribute sty = new StyleAttribute(); 094 095 if (getPres(sty.setName("transform"))) 096 { 097 xform = parseTransform(sty.getStringValue()); 098 } 099 } 100 101 protected Shape shapeToParent(Shape shape) 102 { 103 if (xform == null) 104 { 105 return shape; 106 } 107 return xform.createTransformedShape(shape); 108 } 109 110 protected Rectangle2D boundsToParent(Rectangle2D rect) 111 { 112 if (xform == null) 113 { 114 return rect; 115 } 116 return xform.createTransformedShape(rect).getBounds2D(); 117 } 118 119 /** 120 * Updates all attributes in this diagram associated with a time event. Ie, 121 * all attributes with track information. 122 * 123 * @return - true if this node has changed state as a result of the time 124 * update 125 */ 126 public boolean updateTime(double curTime) throws SVGException 127 { 128 StyleAttribute sty = new StyleAttribute(); 129 130 if (getPres(sty.setName("transform"))) 131 { 132 AffineTransform newXform = parseTransform(sty.getStringValue()); 133 if (!newXform.equals(xform)) 134 { 135 xform = newXform; 136 return true; 137 } 138 } 139 140 return false; 141 } 142}