package org.jfree.ui;
import java.awt.GradientPaint;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import org.jfree.util.PublicCloneable;
/**
* Transforms a <code>GradientPaint</code> to range over the width of a target
* shape.
* @author David Gilbert
*/
public class StandardGradientPaintTransformer
implements GradientPaintTransformer, Cloneable, PublicCloneable,
Serializable {
/** For serialization. */
private static final long serialVersionUID = -8155025776964678320L;
/** The transform type. */
private GradientPaintTransformType type;
/**
* Creates a new transformer.
*/
public StandardGradientPaintTransformer() {
this(GradientPaintTransformType.VERTICAL);
}
/**
* Creates a new transformer.
*
* @param type the transform type.
*/
public StandardGradientPaintTransformer(
final GradientPaintTransformType type) {
this.type = type;
}
/**
* Transforms a <code>GradientPaint</code> instance.
*
* @param paint the original paint.
* @param target the target shape.
*
* @return The transformed paint.
*/
public GradientPaint transform(final GradientPaint paint,
final Shape target) {
GradientPaint result = paint;
final Rectangle2D bounds = target.getBounds2D();
if (this.type.equals(GradientPaintTransformType.VERTICAL)) {
result = new GradientPaint(
(float) bounds.getCenterX(), (float) bounds.getMinY(),
paint.getColor1(), (float) bounds.getCenterX(),
(float) bounds.getMaxY(), paint.getColor2()
);
}
else if (this.type.equals(GradientPaintTransformType.HORIZONTAL)) {
result = new GradientPaint(
(float) bounds.getMinX(), (float) bounds.getCenterY(),
paint.getColor1(), (float) bounds.getMaxX(),
(float) bounds.getCenterY(), paint.getColor2()
);
}
else if (this.type.equals(GradientPaintTransformType.CENTER_HORIZONTAL))
{
result = new GradientPaint(
(float) bounds.getCenterX(), (float) bounds.getCenterY(),
paint.getColor1(), (float) bounds.getMaxX(),
(float) bounds.getCenterY(), paint.getColor2(), true
);
}
else if (this.type.equals(GradientPaintTransformType.CENTER_VERTICAL)) {
result = new GradientPaint(
(float) bounds.getCenterX(), (float) bounds.getMinY(),
paint.getColor1(), (float) bounds.getCenterX(),
(float) bounds.getCenterY(), paint.getColor2(), true
);
}
return result;
}
/**
* Tests this instance for equality with an arbitrary object.
*
* @param obj the object to test against (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(final Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof StandardGradientPaintTransformer)) {
return false;
}
final StandardGradientPaintTransformer that
= (StandardGradientPaintTransformer) obj;
if (this.type != that.type) {
return false;
}
return true;
}
/**
* Returns a clone of the transformer.
*
* @return A clone.
*
* @throws CloneNotSupportedException not thrown by this class, but
* subclasses (if any) might.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Returns a hash code for this object.
*
* @return A hash code.
*/
public int hashCode() {
return (this.type != null ? this.type.hashCode() : 0);
}
}