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, 1:55 AM
035 */
036package com.kitfox.svg;
037
038import com.kitfox.svg.xml.StyleAttribute;
039import java.awt.Color;
040import java.awt.Paint;
041import java.awt.geom.AffineTransform;
042import java.awt.geom.Point2D;
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 RadialGradient extends Gradient
050{
051    public static final String TAG_NAME = "radialgradient";
052
053    float cx = 0.5f;
054    float cy = 0.5f;
055    float fx = 0.5f;
056    float fy = 0.5f;
057    float r = 0.5f;
058
059    /**
060     * Creates a new instance of RadialGradient
061     */
062    public RadialGradient()
063    {
064    }
065
066    public String getTagName()
067    {
068        return TAG_NAME;
069    }
070
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("fx")))
088        {
089            fx = sty.getFloatValueWithUnits();
090        }
091
092        if (getPres(sty.setName("fy")))
093        {
094            fy = sty.getFloatValueWithUnits();
095        }
096
097        if (getPres(sty.setName("r")))
098        {
099            r = sty.getFloatValueWithUnits();
100        }
101    }
102
103    public Paint getPaint(Rectangle2D bounds, AffineTransform xform)
104    {
105        com.kitfox.svg.batik.MultipleGradientPaint.CycleMethodEnum method;
106        switch (spreadMethod)
107        {
108            default:
109            case SM_PAD:
110                method = com.kitfox.svg.batik.MultipleGradientPaint.NO_CYCLE;
111                break;
112            case SM_REPEAT:
113                method = com.kitfox.svg.batik.MultipleGradientPaint.REPEAT;
114                break;
115            case SM_REFLECT:
116                method = com.kitfox.svg.batik.MultipleGradientPaint.REFLECT;
117                break;
118        }
119
120        Paint paint;
121        Point2D.Float pt1 = new Point2D.Float(cx, cy);
122        Point2D.Float pt2 = new Point2D.Float(fx, fy);
123        if (pt1.equals(pt2))
124        {
125            Color[] colors = getStopColors();
126            paint = colors.length > 0 ? colors[0] : Color.black;
127        } else if (gradientUnits == GU_USER_SPACE_ON_USE)
128        {
129            paint = new com.kitfox.svg.batik.RadialGradientPaint(
130                pt1,
131                r,
132                pt2,
133                getStopFractions(),
134                getStopColors(),
135                method,
136                com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
137                gradientTransform);
138        } else
139        {
140            AffineTransform viewXform = new AffineTransform();
141            viewXform.translate(bounds.getX(), bounds.getY());
142            viewXform.scale(bounds.getWidth(), bounds.getHeight());
143
144            viewXform.concatenate(gradientTransform);
145
146            paint = new com.kitfox.svg.batik.RadialGradientPaint(
147                pt1,
148                r,
149                pt2,
150                getStopFractions(),
151                getStopColors(),
152                method,
153                com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
154                viewXform);
155        }
156
157        return paint;
158    }
159
160    /**
161     * Updates all attributes in this diagram associated with a time event. Ie,
162     * all attributes with track information.
163     *
164     * @return - true if this node has changed state as a result of the time
165     * update
166     */
167    public boolean updateTime(double curTime) throws SVGException
168    {
169//        if (trackManager.getNumTracks() == 0) return false;
170        boolean changeState = super.updateTime(curTime);
171
172        //Get current values for parameters
173        StyleAttribute sty = new StyleAttribute();
174        boolean shapeChange = false;
175
176        if (getPres(sty.setName("cx")))
177        {
178            float newVal = sty.getFloatValueWithUnits();
179            if (newVal != cx)
180            {
181                cx = newVal;
182                shapeChange = true;
183            }
184        }
185
186        if (getPres(sty.setName("cy")))
187        {
188            float newVal = sty.getFloatValueWithUnits();
189            if (newVal != cy)
190            {
191                cy = newVal;
192                shapeChange = true;
193            }
194        }
195
196        if (getPres(sty.setName("fx")))
197        {
198            float newVal = sty.getFloatValueWithUnits();
199            if (newVal != fx)
200            {
201                fx = newVal;
202                shapeChange = true;
203            }
204        }
205
206        if (getPres(sty.setName("fy")))
207        {
208            float newVal = sty.getFloatValueWithUnits();
209            if (newVal != fy)
210            {
211                fy = newVal;
212                shapeChange = true;
213            }
214        }
215
216        if (getPres(sty.setName("r")))
217        {
218            float newVal = sty.getFloatValueWithUnits();
219            if (newVal != r)
220            {
221                r = newVal;
222                shapeChange = true;
223            }
224        }
225
226        return changeState;
227    }
228}