/*
* SVG Salamander
* Copyright (c) 2004, Mark McKay
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Mark McKay can be contacted at mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on January 26, 2004, 1:54 AM
*/
package com.kitfox.svg;
import java.awt.geom.*;
import java.awt.*;
import com.kitfox.svg.xml.*;
//import org.apache.batik.ext.awt.*;
/**
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
public class LinearGradient extends Gradient {
float x1 = 0f;
float y1 = 0f;
float x2 = 1f;
float y2 = 0f;
/** Creates a new instance of LinearGradient */
public LinearGradient() {
}
/*
public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
{
//Load style string
super.loaderStartElement(helper, attrs, parent);
String x1 = attrs.getValue("x1");
String x2 = attrs.getValue("x2");
String y1 = attrs.getValue("y1");
String y2 = attrs.getValue("y2");
if (x1 != null) this.x1 = (float)XMLParseUtil.parseRatio(x1);
if (y1 != null) this.y1 = (float)XMLParseUtil.parseRatio(y1);
if (x2 != null) this.x2 = (float)XMLParseUtil.parseRatio(x2);
if (y2 != null) this.y2 = (float)XMLParseUtil.parseRatio(y2);
}
*/
/*
public void loaderEndElement(SVGLoaderHelper helper)
{
super.loaderEndElement(helper);
build();
}
*/
protected void build() throws SVGException
{
super.build();
StyleAttribute sty = new StyleAttribute();
if (getPres(sty.setName("x1"))) x1 = sty.getFloatValueWithUnits();
if (getPres(sty.setName("y1"))) y1 = sty.getFloatValueWithUnits();
if (getPres(sty.setName("x2"))) x2 = sty.getFloatValueWithUnits();
if (getPres(sty.setName("y2"))) y2 = sty.getFloatValueWithUnits();
}
public Paint getPaint(Rectangle2D bounds, AffineTransform xform)
{
com.kitfox.svg.batik.MultipleGradientPaint.CycleMethodEnum method;
switch (spreadMethod)
{
default:
case SM_PAD:
method = com.kitfox.svg.batik.MultipleGradientPaint.NO_CYCLE;
break;
case SM_REPEAT:
method = com.kitfox.svg.batik.MultipleGradientPaint.REPEAT;
break;
case SM_REFLECT:
method = com.kitfox.svg.batik.MultipleGradientPaint.REFLECT;
break;
}
Paint paint;
Point2D.Float pt1 = new Point2D.Float(x1, y1);
Point2D.Float pt2 = new Point2D.Float(x2, y2);
if (pt1.equals(pt2))
{
Color[] colors = getStopColors();
paint = colors.length > 0 ? colors[0] : Color.black;
}
else if (gradientUnits == GU_USER_SPACE_ON_USE)
{
paint = new com.kitfox.svg.batik.LinearGradientPaint(
pt1,
pt2,
getStopFractions(),
getStopColors(),
method,
com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
gradientTransform == null
? new AffineTransform()
: gradientTransform);
}
else
{
AffineTransform viewXform = new AffineTransform();
viewXform.translate(bounds.getX(), bounds.getY());
//This is a hack to get around shapes that have a width or height of 0. Should be close enough to the true answer.
double width = Math.max(1, bounds.getWidth());
double height = Math.max(1, bounds.getHeight());
viewXform.scale(width, height);
if (gradientTransform != null)
{
viewXform.concatenate(gradientTransform);
}
paint = new com.kitfox.svg.batik.LinearGradientPaint(
pt1,
pt2,
getStopFractions(),
getStopColors(),
method,
com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
viewXform);
}
return paint;
}
/**
* Updates all attributes in this diagram associated with a time event.
* Ie, all attributes with track information.
* @return - true if this node has changed state as a result of the time
* update
*/
public boolean updateTime(double curTime) throws SVGException
{
// if (trackManager.getNumTracks() == 0) return stopChange;
boolean changeState = super.updateTime(curTime);
//Get current values for parameters
StyleAttribute sty = new StyleAttribute();
boolean shapeChange = false;
if (getPres(sty.setName("x1")))
{
float newVal = sty.getFloatValueWithUnits();
if (newVal != x1)
{
x1 = newVal;
shapeChange = true;
}
}
if (getPres(sty.setName("y1")))
{
float newVal = sty.getFloatValueWithUnits();
if (newVal != y1)
{
y1 = newVal;
shapeChange = true;
}
}
if (getPres(sty.setName("x2")))
{
float newVal = sty.getFloatValueWithUnits();
if (newVal != x2)
{
x2 = newVal;
shapeChange = true;
}
}
if (getPres(sty.setName("y2")))
{
float newVal = sty.getFloatValueWithUnits();
if (newVal != y2)
{
y2 = newVal;
shapeChange = true;
}
}
return changeState || shapeChange;
}
}
