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 (gradientUnits == GU_USER_SPACE_ON_USE)
124        {
125            paint = new com.kitfox.svg.batik.RadialGradientPaint(
126                pt1,
127                r,
128                pt2,
129                getStopFractions(),
130                getStopColors(),
131                method,
132                com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
133                gradientTransform);
134        } else
135        {
136            AffineTransform viewXform = new AffineTransform();
137            viewXform.translate(bounds.getX(), bounds.getY());
138            viewXform.scale(bounds.getWidth(), bounds.getHeight());
139
140            viewXform.concatenate(gradientTransform);
141
142            paint = new com.kitfox.svg.batik.RadialGradientPaint(
143                pt1,
144                r,
145                pt2,
146                getStopFractions(),
147                getStopColors(),
148                method,
149                com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
150                viewXform);
151        }
152
153        return paint;
154    }
155
156    /**
157     * Updates all attributes in this diagram associated with a time event. Ie,
158     * all attributes with track information.
159     *
160     * @return - true if this node has changed state as a result of the time
161     * update
162     */
163    public boolean updateTime(double curTime) throws SVGException
164    {
165//        if (trackManager.getNumTracks() == 0) return false;
166        boolean changeState = super.updateTime(curTime);
167
168        //Get current values for parameters
169        StyleAttribute sty = new StyleAttribute();
170        boolean shapeChange = false;
171
172        if (getPres(sty.setName("cx")))
173        {
174            float newVal = sty.getFloatValueWithUnits();
175            if (newVal != cx)
176            {
177                cx = newVal;
178                shapeChange = true;
179            }
180        }
181
182        if (getPres(sty.setName("cy")))
183        {
184            float newVal = sty.getFloatValueWithUnits();
185            if (newVal != cy)
186            {
187                cy = newVal;
188                shapeChange = true;
189            }
190        }
191
192        if (getPres(sty.setName("fx")))
193        {
194            float newVal = sty.getFloatValueWithUnits();
195            if (newVal != fx)
196            {
197                fx = newVal;
198                shapeChange = true;
199            }
200        }
201
202        if (getPres(sty.setName("fy")))
203        {
204            float newVal = sty.getFloatValueWithUnits();
205            if (newVal != fy)
206            {
207                fy = newVal;
208                shapeChange = true;
209            }
210        }
211
212        if (getPres(sty.setName("r")))
213        {
214            float newVal = sty.getFloatValueWithUnits();
215            if (newVal != r)
216            {
217                r = newVal;
218                shapeChange = true;
219            }
220        }
221
222        return changeState;
223    }
224}