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GlossPainter.java
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GlossPainter.java
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/*
* $Id: GlossPainter.java 3288 2009-03-10 14:36:28Z kschaefe $
*
* Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.hdesktop.swingx.painter;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Rectangle;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
/**
* <p>A Painter implementation that simulates a gloss effect. The gloss can
* be positioned at the top or bottom of the drawing area. To fill the gloss,
* this painter uses a Paint instance which can be used to fill with a color
* (opaque or translucent), a texture, a gradient...</p>
* <p>The following example creates a white gloss at the top of the drawing
* area:</p>
* <pre>
* GlossPainter p = new GlossPainter();
* p.setPaint(new Color(1.0f, 1.0f, 1.0f, 0.2f);
* p.setPosition(GlossPainter.GlossPosition.TOP);
* panel.setBackgroundPainter(p);
* </pre>
* <p>The values shown in this examples are the values used by default if
* they are not specified.</p>
*
* @author Romain Guy <romain.guy@mac.com>
*/
public class GlossPainter extends AbstractPainter<Object> {
/**
* <p>Used to define the position of the gloss on the painted area.</p>
*/
public enum GlossPosition {
TOP, BOTTOM
}
private Paint paint;
private GlossPosition position;
/**
* <p>Creates a new gloss painter positioned at the top of the painted
* area with a 20% translucent white color.</p>
*/
public GlossPainter() {
this(new Color(1.0f, 1.0f, 1.0f, 0.2f), GlossPosition.TOP);
}
/**
* <p>Creates a new gloss painter positioned at the top of the painted
* area with the specified paint.</p>
*
* @param paint The paint to be used when filling the gloss
*/
public GlossPainter(Paint paint) {
this(paint, GlossPosition.TOP);
}
/**
* <p>Creates a new gloss painter positioned at the specified position
* and using a white, 20% translucent paint.</p>
*
* @param position The position of the gloss on the painted area
*/
public GlossPainter(GlossPosition position) {
this(new Color(1.0f, 1.0f, 1.0f, 0.2f), position);
}
/**
* <p>Creates a new gloss painter positioned at the specified position
* and painted with the specified paint.</p>
*
* @param paint The paint to be used when filling the gloss
* @param position The position of the gloss on the painted area
*/
public GlossPainter(Paint paint, GlossPosition position) {
this.setPaint(paint);
this.setPosition(position);
}
/**
* {@inheritDoc}
*/
@Override
protected void doPaint(Graphics2D g, Object component, int width, int height) {
if (getPaint() != null) {
Ellipse2D ellipse = new Ellipse2D.Double(-width / 2.0,
height / 2.7, width * 2.0,
height * 2.0);
Area gloss = new Area(ellipse);
if (getPosition() == GlossPosition.TOP) {
Area area = new Area(new Rectangle(0, 0,
width, height));
area.subtract(new Area(ellipse));
gloss = area;
}
/*
if(getClip() != null) {
gloss.intersect(new Area(getClip()));
}*/
g.setPaint(getPaint());
g.fill(gloss);
}
}
/**
* <p>Returns the paint currently used by the painter to fill the gloss.</p>
*
* @return the current Paint instance used by the painter
*/
public Paint getPaint() {
return paint;
}
/**
* <p>Changes the paint to be used to fill the gloss. When the specified
* paint is null, nothing is painted. A paint can be an instance of
* Color.</p>
*
* @param paint The Paint instance to be used to fill the gloss
*/
public void setPaint(Paint paint) {
Paint old = this.paint;
this.paint = paint;
setDirty(true);
firePropertyChange("paint", old, getPaint());
}
/**
* <p>Returns the position at which the gloss is painted.</p>
*
* @return the position of the gloss in the painted area
*/
public GlossPosition getPosition() {
return position;
}
/**
* <p>Changes the position of the gloss in the painted area. Only the
* values defined in the GlossPosition enum are valid.</p>
*
* @param position The position at which the gloss is painted
*/
public void setPosition(GlossPosition position) {
GlossPosition old = this.position;
this.position = position;
setDirty(true);
firePropertyChange("position", old, getPosition());
}
}