/*
* RapidMiner
*
* Copyright (C) 2001-2011 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.plotter.charts;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RectangularShape;
import org.jfree.chart.HashUtilities;
import org.jfree.chart.renderer.category.BarPainter;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.ui.RectangleEdge;
import com.rapidminer.gui.tools.SwingTools;
/**
* The painter for the bar charts.
*
* @author Ingo Mierswa
*/
public class RapidBarPainter implements BarPainter {
/** The division point between the first and second gradient regions. */
private double g1;
/** The division point between the second and third gradient regions. */
private double g2;
/** The division point between the third and fourth gradient regions. */
private double g3;
/**
* Creates a new instance.
*/
public RapidBarPainter() {
//this(0.10, 0.20, 0.80);
this(0.0, 0.3, 0.7);
}
/**
* Creates a new instance.
*
* @param g1
* @param g2
* @param g3
*/
public RapidBarPainter(double g1, double g2, double g3) {
this.g1 = g1;
this.g2 = g2;
this.g3 = g3;
}
/**
* Paints a single bar instance.
*
* @param g2 the graphics target.
* @param renderer the renderer.
* @param row the row index.
* @param column the column index.
* @param bar the bar
* @param base indicates which side of the rectangle is the base of the
* bar.
*/
public void paintBar(Graphics2D g2, BarRenderer renderer, int row, int column, RectangularShape bar, RectangleEdge base) {
Paint itemPaint = renderer.getItemPaint(row, column);
Color c0, c1;
if (itemPaint instanceof Color) {
c0 = ((Color) itemPaint).darker();
c1 = c0;
} else if (itemPaint instanceof GradientPaint) {
GradientPaint gp = (GradientPaint) itemPaint;
c0 = gp.getColor1();
c1 = gp.getColor2();
} else {
c0 = SwingTools.DARK_BLUE;
c1 = c0.brighter();
}
// as a special case, if the bar color has alpha == 0, we draw
// nothing.
if (c0.getAlpha() == 0) {
return;
}
if (base == RectangleEdge.TOP || base == RectangleEdge.BOTTOM) {
Rectangle2D[] regions = splitVerticalBar(bar, this.g1, this.g2, this.g3);
GradientPaint gp = new GradientPaint((float) regions[0].getMinX(), 0.0f, c0, (float) regions[0].getMaxX(), 0.0f, c1);
g2.setPaint(gp);
g2.fill(regions[0]);
gp = new GradientPaint((float) regions[1].getMinX(), 0.0f, c1, (float) regions[1].getMaxX(), 0.0f, Color.WHITE);
g2.setPaint(gp);
g2.fill(regions[1]);
gp = new GradientPaint((float) regions[2].getMinX(), 0.0f, Color.WHITE, (float) regions[2].getMaxX(), 0.0f, c1);
g2.setPaint(gp);
g2.fill(regions[2]);
gp = new GradientPaint((float) regions[3].getMinX(), 0.0f, c1, (float) regions[3].getMaxX(), 0.0f, c0.darker());
g2.setPaint(gp);
g2.fill(regions[3]);
}
else if (base == RectangleEdge.LEFT || base == RectangleEdge.RIGHT) {
Rectangle2D[] regions = splitHorizontalBar(bar, this.g1, this.g2, this.g3);
GradientPaint gp = new GradientPaint(0.0f, (float) regions[0].getMinY(), c0, 0.0f, (float) regions[0].getMaxX(), c1);
g2.setPaint(gp);
g2.fill(regions[0]);
gp = new GradientPaint(0.0f, (float) regions[1].getMinY(), c1, 0.0f, (float) regions[1].getMaxY(), Color.WHITE);
g2.setPaint(gp);
g2.fill(regions[1]);
gp = new GradientPaint(0.0f, (float) regions[2].getMinY(), Color.WHITE, 0.0f, (float) regions[2].getMaxY(), c1);
g2.setPaint(gp);
g2.fill(regions[2]);
gp = new GradientPaint(0.0f, (float) regions[3].getMinY(), c1, 0.0f, (float) regions[3].getMaxY(), c0.darker());
g2.setPaint(gp);
g2.fill(regions[3]);
}
// draw the outline...
if (renderer.isDrawBarOutline()
/*&& state.getBarWidth() > renderer.BAR_OUTLINE_WIDTH_THRESHOLD*/) {
Stroke stroke = renderer.getItemOutlineStroke(row, column);
Paint paint = renderer.getItemOutlinePaint(row, column);
if (stroke != null && paint != null) {
g2.setStroke(stroke);
g2.setPaint(paint);
g2.draw(bar);
}
}
}
/**
* Paints a single bar instance.
*
* @param g2 the graphics target.
* @param renderer the renderer.
* @param row the row index.
* @param column the column index.
* @param bar the bar
* @param base indicates which side of the rectangle is the base of the
* bar.
* @param pegShadow peg the shadow to the base of the bar?
*/
public void paintBarShadow(Graphics2D g2, BarRenderer renderer, int row,
int column, RectangularShape bar, RectangleEdge base,
boolean pegShadow) {
}
/**
* Splits a bar into subregions (elsewhere, these subregions will have
* different gradients applied to them).
*
* @param bar the bar shape.
* @param a the first division.
* @param b the second division.
* @param c the third division.
*
* @return An array containing four subregions.
*/
private Rectangle2D[] splitVerticalBar(RectangularShape bar, double a, double b, double c) {
Rectangle2D[] result = new Rectangle2D[4];
double x0 = bar.getMinX();
double x1 = Math.rint(x0 + (bar.getWidth() * a));
double x2 = Math.rint(x0 + (bar.getWidth() * b));
double x3 = Math.rint(x0 + (bar.getWidth() * c));
result[0] = new Rectangle2D.Double(bar.getMinX(), bar.getMinY(),
x1 - x0, bar.getHeight());
result[1] = new Rectangle2D.Double(x1, bar.getMinY(), x2 - x1,
bar.getHeight());
result[2] = new Rectangle2D.Double(x2, bar.getMinY(), x3 - x2,
bar.getHeight());
result[3] = new Rectangle2D.Double(x3, bar.getMinY(),
bar.getMaxX() - x3, bar.getHeight());
return result;
}
/**
* Splits a bar into subregions (elsewhere, these subregions will have
* different gradients applied to them).
*
* @param bar the bar shape.
* @param a the first division.
* @param b the second division.
* @param c the third division.
*
* @return An array containing four subregions.
*/
private Rectangle2D[] splitHorizontalBar(RectangularShape bar, double a,
double b, double c) {
Rectangle2D[] result = new Rectangle2D[4];
double y0 = bar.getMinY();
double y1 = Math.rint(y0 + (bar.getHeight() * a));
double y2 = Math.rint(y0 + (bar.getHeight() * b));
double y3 = Math.rint(y0 + (bar.getHeight() * c));
result[0] = new Rectangle2D.Double(bar.getMinX(), bar.getMinY(),
bar.getWidth(), y1 - y0);
result[1] = new Rectangle2D.Double(bar.getMinX(), y1, bar.getWidth(),
y2 - y1);
result[2] = new Rectangle2D.Double(bar.getMinX(), y2, bar.getWidth(),
y3 - y2);
result[3] = new Rectangle2D.Double(bar.getMinX(), y3, bar.getWidth(),
bar.getMaxY() - y3);
return result;
}
/**
* Tests this instance for equality with an arbitrary object.
*
* @param obj the obj (<code>null</code> permitted).
*
* @return A boolean.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof RapidBarPainter)) {
return false;
}
RapidBarPainter that = (RapidBarPainter) obj;
if (this.g1 != that.g1) {
return false;
}
if (this.g2 != that.g2) {
return false;
}
if (this.g3 != that.g3) {
return false;
}
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int hash = 37;
hash = HashUtilities.hashCode(hash, this.g1);
hash = HashUtilities.hashCode(hash, this.g2);
hash = HashUtilities.hashCode(hash, this.g3);
return hash;
}
}