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    @Override
065    public String getTagName()
066    {
067        return TAG_NAME;
068    }
069
070    @Override
071    protected void build() throws SVGException
072    {
073        super.build();
074
075        StyleAttribute sty = new StyleAttribute();
076
077        if (getPres(sty.setName("cx")))
078        {
079            cx = sty.getFloatValueWithUnits();
080        }
081
082        if (getPres(sty.setName("cy")))
083        {
084            cy = sty.getFloatValueWithUnits();
085        }
086
087        if (getPres(sty.setName("r")))
088        {
089            r = sty.getFloatValueWithUnits();
090        }
091
092        circle.setFrame(cx - r, cy - r, r * 2f, r * 2f);
093    }
094
095    @Override
096    public void render(Graphics2D g) throws SVGException
097    {
098        beginLayer(g);
099        renderShape(g, circle);
100        finishLayer(g);
101    }
102
103    @Override
104    public Shape getShape()
105    {
106        return shapeToParent(circle);
107    }
108
109    @Override
110    public Rectangle2D getBoundingBox() throws SVGException
111    {
112        return boundsToParent(includeStrokeInBounds(circle.getBounds2D()));
113    }
114
115    /**
116     * Updates all attributes in this diagram associated with a time event. Ie,
117     * all attributes with track information.
118     *
119     * @return - true if this node has changed state as a result of the time
120     * update
121     */
122    @Override
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 (getPres(sty.setName("cx")))
133        {
134            float newVal = sty.getFloatValueWithUnits();
135            if (newVal != cx)
136            {
137                cx = newVal;
138                shapeChange = true;
139            }
140        }
141
142        if (getPres(sty.setName("cy")))
143        {
144            float newVal = sty.getFloatValueWithUnits();
145            if (newVal != cy)
146            {
147                cy = newVal;
148                shapeChange = true;
149            }
150        }
151
152        if (getPres(sty.setName("r")))
153        {
154            float newVal = sty.getFloatValueWithUnits();
155            if (newVal != r)
156            {
157                r = newVal;
158                shapeChange = true;
159            }
160        }
161
162        if (shapeChange)
163        {
164            build();
165//            circle.setFrame(cx - r, cy - r, r * 2f, r * 2f);
166//            return true;
167        }
168
169        return changeState || shapeChange;
170    }
171}