/*
* $Id: GradientTrackRenderer.java 3475 2009-08-28 08:30:47Z kleopatra $
*
* Copyright 2004 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.jdesktop.swingx.color;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.LinearGradientPaint;
import java.awt.MultipleGradientPaint;
import java.awt.Paint;
import java.awt.Rectangle;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.List;
import javax.swing.JComponent;
import org.jdesktop.swingx.JXMultiThumbSlider;
import org.jdesktop.swingx.multislider.Thumb;
import org.jdesktop.swingx.multislider.TrackRenderer;
/**
* <p><b>Dependency</b>: Because this class relies on LinearGradientPaint and
* RadialGradientPaint, it requires the optional MultipleGradientPaint.jar</p>
*/
public class GradientTrackRenderer extends JComponent implements TrackRenderer {
private Paint checker_paint;
public GradientTrackRenderer() {
checker_paint = ColorUtil.getCheckerPaint();
}
private JXMultiThumbSlider slider;
@Override
public void paint(Graphics g) {
super.paint(g);
paintComponent(g);
}
@Override
protected void paintComponent(Graphics gfx) {
Graphics2D g = (Graphics2D)gfx;
// get the list of colors
List<Thumb<Color>> stops = slider.getModel().getSortedThumbs();
int len = stops.size();
// set up the data for the gradient
float[] fractions = new float[len];
Color[] colors = new Color[len];
int i = 0;
for(Thumb<Color> thumb : stops) {
colors[i] = (Color)thumb.getObject();
fractions[i] = thumb.getPosition();
i++;
}
// calculate the track area
int thumb_width = 12;
int track_width = slider.getWidth() - thumb_width;
g.translate(thumb_width / 2, 12);
Rectangle2D rect = new Rectangle(0, 0, track_width, 20);
// fill in the checker
g.setPaint(checker_paint);
g.fill(rect);
// fill in the gradient
Point2D start = new Point2D.Float(0,0);
Point2D end = new Point2D.Float(track_width,0);
MultipleGradientPaint paint = new LinearGradientPaint(
(float)start.getX(),
(float)start.getY(),
(float)end.getX(),
(float)end.getY(),
fractions,colors);
g.setPaint(paint);
g.fill(rect);
// draw a border
g.setColor(Color.black);
g.draw(rect);
g.translate(-thumb_width / 2, -12);
}
public JComponent getRendererComponent(JXMultiThumbSlider slider) {
this.slider = slider;
return this;
}
}