/*
* LinearGradient.java
*
*
* The Salamander Project - 2D and 3D graphics libraries in Java
* Copyright (C) 2004 Mark McKay
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* 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 com.kitfox.svg.xml.StyleAttribute;
import java.awt.geom.*;
import java.awt.*;
import com.kitfox.svg.xml.*;
import org.xml.sax.*;
//import org.apache.batik.ext.awt.*;
import com.kitfox.svg.batik.*;
/**
* @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;
}
com.kitfox.svg.batik.LinearGradientPaint paint;
if (gradientUnits == GU_USER_SPACE_ON_USE)
{
// paint = new LinearGradientPaint(x1, y1, x2, y2, getStopFractions(), getStopColors(), method);
paint = new com.kitfox.svg.batik.LinearGradientPaint(
new Point2D.Float(x1, y1),
new Point2D.Float(x2, y2),
getStopFractions(),
getStopColors(),
method,
com.kitfox.svg.batik.MultipleGradientPaint.SRGB,
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 = bounds.getWidth();
double height = bounds.getHeight();
if (width == 0) width = 1;
if (height == 0) height = 1;
viewXform.scale(width, height);
viewXform.concatenate(gradientTransform);
paint = new com.kitfox.svg.batik.LinearGradientPaint(
new Point2D.Float(x1, y1),
new Point2D.Float(x2, y2),
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;
}
}