source: josm/trunk/src/com/kitfox/svg/TransformableElement.java@ 14082

Last change on this file since 14082 was 14082, checked in by Don-vip, 6 years ago

fix #16551 - NPE

  • Property svn:eol-style set to native
File size: 4.1 KB
Line 
1/*
2 * SVG Salamander
3 * Copyright (c) 2004, Mark McKay
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or
7 * without modification, are permitted provided that the following
8 * conditions are met:
9 *
10 * - Redistributions of source code must retain the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer.
13 * - Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
32 * projects can be found at http://www.kitfox.com
33 *
34 * Created on January 26, 2004, 9:00 AM
35 */
36package com.kitfox.svg;
37
38import com.kitfox.svg.xml.StyleAttribute;
39import java.awt.Shape;
40import java.awt.geom.AffineTransform;
41import java.awt.geom.Rectangle2D;
42
43/**
44 * Maintains bounding box for this element
45 *
46 * @author Mark McKay
47 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
48 */
49abstract public class TransformableElement extends SVGElement
50{
51 AffineTransform xform = null;
52
53 /**
54 * Creates a new instance of BoundedElement
55 */
56 public TransformableElement()
57 {
58 }
59
60 public TransformableElement(String id, SVGElement parent)
61 {
62 super(id, parent);
63 }
64
65 /**
66 * Fetches a copy of the cached AffineTransform. Note that this value will
67 * only be valid after the node has been updated.
68 *
69 * @return
70 */
71 public AffineTransform getXForm()
72 {
73 return xform == null ? null : new AffineTransform(xform);
74 }
75 /*
76 public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
77 {
78 //Load style string
79 super.loaderStartElement(helper, attrs, parent);
80
81 String transform = attrs.getValue("transform");
82 if (transform != null)
83 {
84 xform = parseTransform(transform);
85 }
86 }
87 */
88
89 @Override
90 protected void build() throws SVGException
91 {
92 super.build();
93
94 StyleAttribute sty = new StyleAttribute();
95
96 if (getPres(sty.setName("transform")))
97 {
98 xform = parseTransform(sty.getStringValue());
99 }
100 }
101
102 protected Shape shapeToParent(Shape shape)
103 {
104 if (xform == null)
105 {
106 return shape;
107 }
108 return xform.createTransformedShape(shape);
109 }
110
111 protected Rectangle2D boundsToParent(Rectangle2D rect)
112 {
113 if (xform == null || rect == null)
114 {
115 return rect;
116 }
117 return xform.createTransformedShape(rect).getBounds2D();
118 }
119
120 /**
121 * Updates all attributes in this diagram associated with a time event. Ie,
122 * all attributes with track information.
123 *
124 * @return - true if this node has changed state as a result of the time
125 * update
126 */
127 @Override
128 public boolean updateTime(double curTime) throws SVGException
129 {
130 StyleAttribute sty = new StyleAttribute();
131
132 if (getPres(sty.setName("transform")))
133 {
134 AffineTransform newXform = parseTransform(sty.getStringValue());
135 if (!newXform.equals(xform))
136 {
137 xform = newXform;
138 return true;
139 }
140 }
141
142 return false;
143 }
144}
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