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, 5:25 PM
035 */
036package com.kitfox.svg;
037
038import com.kitfox.svg.xml.StyleAttribute;
039import com.kitfox.svg.xml.XMLParseUtil;
040import java.awt.Graphics2D;
041import java.awt.Shape;
042import java.awt.geom.GeneralPath;
043import java.awt.geom.Rectangle2D;
044
045/**
046 * @author Mark McKay
047 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
048 */
049public class Polygon extends ShapeElement
050{
051    public static final String TAG_NAME = "polygon";
052
053    int fillRule = GeneralPath.WIND_NON_ZERO;
054    String pointsStrn = "";
055    GeneralPath path;
056
057    /**
058     * Creates a new instance of Rect
059     */
060    public Polygon()
061    {
062    }
063
064    public String getTagName()
065    {
066        return TAG_NAME;
067    }
068
069    protected void build() throws SVGException
070    {
071        super.build();
072
073        StyleAttribute sty = new StyleAttribute();
074
075        if (getPres(sty.setName("points")))
076        {
077            pointsStrn = sty.getStringValue();
078        }
079
080        String fillRuleStrn = getStyle(sty.setName("fill-rule")) ? sty.getStringValue() : "nonzero";
081        fillRule = fillRuleStrn.equals("evenodd") ? GeneralPath.WIND_EVEN_ODD : GeneralPath.WIND_NON_ZERO;
082
083        buildPath();
084    }
085
086    protected void buildPath()
087    {
088        float[] points = XMLParseUtil.parseFloatList(pointsStrn);
089        path = new GeneralPath(fillRule, points.length / 2);
090
091        path.moveTo(points[0], points[1]);
092        for (int i = 2; i < points.length; i += 2)
093        {
094            path.lineTo(points[i], points[i + 1]);
095        }
096        path.closePath();
097    }
098
099    public void render(Graphics2D g) throws SVGException
100    {
101        beginLayer(g);
102        renderShape(g, path);
103        finishLayer(g);
104    }
105
106    public Shape getShape()
107    {
108        return shapeToParent(path);
109    }
110
111    public Rectangle2D getBoundingBox() throws SVGException
112    {
113        return boundsToParent(includeStrokeInBounds(path.getBounds2D()));
114    }
115
116    /**
117     * Updates all attributes in this diagram associated with a time event. Ie,
118     * all attributes with track information.
119     *
120     * @return - true if this node has changed state as a result of the time
121     * update
122     */
123    public boolean updateTime(double curTime) throws SVGException
124    {
125//        if (trackManager.getNumTracks() == 0) return false;
126        boolean changeState = super.updateTime(curTime);
127
128        //Get current values for parameters
129        StyleAttribute sty = new StyleAttribute();
130        boolean shapeChange = false;
131
132        if (getStyle(sty.setName("fill-rule")))
133        {
134            int newVal = sty.getStringValue().equals("evenodd")
135                ? GeneralPath.WIND_EVEN_ODD
136                : GeneralPath.WIND_NON_ZERO;
137            if (newVal != fillRule)
138            {
139                fillRule = newVal;
140                shapeChange = true;
141            }
142        }
143
144        if (getPres(sty.setName("points")))
145        {
146            String newVal = sty.getStringValue();
147            if (!newVal.equals(pointsStrn))
148            {
149                pointsStrn = newVal;
150                shapeChange = true;
151            }
152        }
153
154
155        if (shapeChange)
156        {
157            build();
158//            buildPath();
159//            return true;
160        }
161
162        return changeState || shapeChange;
163    }
164}