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