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 java.awt.Graphics2D;
040import java.awt.Shape;
041import java.awt.geom.Ellipse2D;
042import java.awt.geom.Rectangle2D;
043
044/**
045 * @author Mark McKay
046 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
047 */
048public class Circle extends ShapeElement
049{
050
051    public static final String TAG_NAME = "circle";
052    float cx = 0f;
053    float cy = 0f;
054    float r = 0f;
055    Ellipse2D.Float circle = new Ellipse2D.Float();
056
057    /**
058     * Creates a new instance of Rect
059     */
060    public Circle()
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("cx")))
076        {
077            cx = sty.getFloatValueWithUnits();
078        }
079
080        if (getPres(sty.setName("cy")))
081        {
082            cy = sty.getFloatValueWithUnits();
083        }
084
085        if (getPres(sty.setName("r")))
086        {
087            r = sty.getFloatValueWithUnits();
088        }
089
090        circle.setFrame(cx - r, cy - r, r * 2f, r * 2f);
091    }
092
093    public void render(Graphics2D g) throws SVGException
094    {
095        beginLayer(g);
096        renderShape(g, circle);
097        finishLayer(g);
098    }
099
100    public Shape getShape()
101    {
102        return shapeToParent(circle);
103    }
104
105    public Rectangle2D getBoundingBox() throws SVGException
106    {
107        return boundsToParent(includeStrokeInBounds(circle.getBounds2D()));
108    }
109
110    /**
111     * Updates all attributes in this diagram associated with a time event. Ie,
112     * all attributes with track information.
113     *
114     * @return - true if this node has changed state as a result of the time
115     * update
116     */
117    public boolean updateTime(double curTime) throws SVGException
118    {
119//        if (trackManager.getNumTracks() == 0) return false;
120        boolean changeState = super.updateTime(curTime);
121
122        //Get current values for parameters
123        StyleAttribute sty = new StyleAttribute();
124        boolean shapeChange = false;
125
126        if (getPres(sty.setName("cx")))
127        {
128            float newVal = sty.getFloatValueWithUnits();
129            if (newVal != cx)
130            {
131                cx = newVal;
132                shapeChange = true;
133            }
134        }
135
136        if (getPres(sty.setName("cy")))
137        {
138            float newVal = sty.getFloatValueWithUnits();
139            if (newVal != cy)
140            {
141                cy = newVal;
142                shapeChange = true;
143            }
144        }
145
146        if (getPres(sty.setName("r")))
147        {
148            float newVal = sty.getFloatValueWithUnits();
149            if (newVal != r)
150            {
151                r = newVal;
152                shapeChange = true;
153            }
154        }
155
156        if (shapeChange)
157        {
158            build();
159//            circle.setFrame(cx - r, cy - r, r * 2f, r * 2f);
160//            return true;
161        }
162
163        return changeState || shapeChange;
164    }
165}