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.MultipleGradientPaint;
040import java.awt.Paint;
041import java.awt.RadialGradientPaint;
042import java.awt.geom.AffineTransform;
043import java.awt.geom.Point2D;
044import java.awt.geom.Rectangle2D;
045
046/**
047 * @author Mark McKay
048 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
049 */
050public class RadialGradient extends Gradient
051{
052    public static final String TAG_NAME = "radialgradient";
053
054    float cx = 0.5f;
055    float cy = 0.5f;
056    boolean hasFocus = false;
057    float fx = 0f;
058    float fy = 0f;
059    float r = 0.5f;
060
061    /**
062     * Creates a new instance of RadialGradient
063     */
064    public RadialGradient()
065    {
066    }
067
068    public String getTagName()
069    {
070        return TAG_NAME;
071    }
072
073    protected void build() throws SVGException
074    {
075        super.build();
076
077        StyleAttribute sty = new StyleAttribute();
078
079        if (getPres(sty.setName("cx")))
080        {
081            cx = sty.getFloatValueWithUnits();
082        }
083
084        if (getPres(sty.setName("cy")))
085        {
086            cy = sty.getFloatValueWithUnits();
087        }
088
089        hasFocus = false;
090        if (getPres(sty.setName("fx")))
091        {
092            fx = sty.getFloatValueWithUnits();
093            hasFocus = true;
094        }
095
096        if (getPres(sty.setName("fy")))
097        {
098            fy = sty.getFloatValueWithUnits();
099            hasFocus = true;
100        }
101
102        if (getPres(sty.setName("r")))
103        {
104            r = sty.getFloatValueWithUnits();
105        }
106    }
107
108    public Paint getPaint(Rectangle2D bounds, AffineTransform xform)
109    {
110        MultipleGradientPaint.CycleMethod method;
111        switch (spreadMethod)
112        {
113            default:
114            case SM_PAD:
115                method = MultipleGradientPaint.CycleMethod.NO_CYCLE;
116                break;
117            case SM_REPEAT:
118                method = MultipleGradientPaint.CycleMethod.REPEAT;
119                break;
120            case SM_REFLECT:
121                method = MultipleGradientPaint.CycleMethod.REFLECT;
122                break;
123        }
124
125        Paint paint;
126        Point2D.Float pt1 = new Point2D.Float(cx, cy);
127        Point2D.Float pt2 = hasFocus ? new Point2D.Float(fx, fy) : pt1;
128        if (gradientUnits == GU_USER_SPACE_ON_USE)
129        {
130            paint = new RadialGradientPaint(
131                pt1,
132                r,
133                pt2,
134                getStopFractions(),
135                getStopColors(),
136                method,
137                MultipleGradientPaint.ColorSpaceType.SRGB,
138                gradientTransform);
139        } else
140        {
141            AffineTransform viewXform = new AffineTransform();
142            viewXform.translate(bounds.getX(), bounds.getY());
143            viewXform.scale(bounds.getWidth(), bounds.getHeight());
144
145            viewXform.concatenate(gradientTransform);
146
147            paint = new RadialGradientPaint(
148                pt1,
149                r,
150                pt2,
151                getStopFractions(),
152                getStopColors(),
153                method,
154                MultipleGradientPaint.ColorSpaceType.SRGB,
155                viewXform);
156        }
157
158        return paint;
159    }
160
161    /**
162     * Updates all attributes in this diagram associated with a time event. Ie,
163     * all attributes with track information.
164     *
165     * @return - true if this node has changed state as a result of the time
166     * update
167     */
168    public boolean updateTime(double curTime) throws SVGException
169    {
170//        if (trackManager.getNumTracks() == 0) return false;
171        boolean changeState = super.updateTime(curTime);
172
173        //Get current values for parameters
174        StyleAttribute sty = new StyleAttribute();
175        boolean shapeChange = false;
176
177        if (getPres(sty.setName("cx")))
178        {
179            float newVal = sty.getFloatValueWithUnits();
180            if (newVal != cx)
181            {
182                cx = newVal;
183                shapeChange = true;
184            }
185        }
186
187        if (getPres(sty.setName("cy")))
188        {
189            float newVal = sty.getFloatValueWithUnits();
190            if (newVal != cy)
191            {
192                cy = newVal;
193                shapeChange = true;
194            }
195        }
196
197        if (getPres(sty.setName("fx")))
198        {
199            float newVal = sty.getFloatValueWithUnits();
200            if (newVal != fx)
201            {
202                fx = newVal;
203                shapeChange = true;
204            }
205        }
206
207        if (getPres(sty.setName("fy")))
208        {
209            float newVal = sty.getFloatValueWithUnits();
210            if (newVal != fy)
211            {
212                fy = newVal;
213                shapeChange = true;
214            }
215        }
216
217        if (getPres(sty.setName("r")))
218        {
219            float newVal = sty.getFloatValueWithUnits();
220            if (newVal != r)
221            {
222                r = newVal;
223                shapeChange = true;
224            }
225        }
226
227        return changeState;
228    }
229}