com.rapidminer.gui.plotter.charts.RapidBarPainter.java Source code

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Here is the source code for com.rapidminer.gui.plotter.charts.RapidBarPainter.java

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/**
 * Copyright (C) 2001-2015 by RapidMiner and the contributors
 *
 * Complete list of developers available at our web site:
 *
 *      http://rapidminer.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 com.rapidminer.gui.tools.SwingTools;

import java.awt.Color;
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;

/**
 * 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 final double g1;

    /** The division point between the second and third gradient regions. */
    private final double g2;

    /** The division point between the third and fourth gradient regions. */
    private final double g3;

    /**
     * Creates a new instance.
     */
    public RapidBarPainter() {
        this(0.0, 0.3, 0.7);
    }

    /**
     * Creates a new instance.
     * 
     * @param g1
     * @param g2
     * @param g3
     */
    public RapidBarPainter(final double g1, final double g2, final 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.
     */
    @Override
    public void paintBar(final Graphics2D g2, final BarRenderer renderer, final int row, final int column,
            final RectangularShape bar, final RectangleEdge base) {
        Paint itemPaint = renderer.getItemPaint(row, column);

        Color c0 = null;

        if (itemPaint instanceof Color) {
            c0 = (Color) itemPaint;
        } else {
            c0 = SwingTools.DARK_BLUE;
        }

        // as a special case, if the bar color has alpha == 0, we draw
        // nothing.
        if (c0.getAlpha() == 0) {
            return;
        }

        g2.setPaint(c0);
        g2.fill(new Rectangle2D.Double(bar.getMinX(), bar.getMinY(), bar.getWidth(), bar.getHeight()));

        // draw the outline...
        if (renderer.isDrawBarOutline()) {
            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?
     */
    @Override
    public void paintBarShadow(final Graphics2D g2, final BarRenderer renderer, final int row, final int column,
            final RectangularShape bar, final RectangleEdge base, final boolean pegShadow) {
    }

    /**
     * Tests this instance for equality with an arbitrary object.
     * 
     * @param obj
     *            the obj (<code>null</code> permitted).
     * 
     * @return A boolean.
     */
    @Override
    public boolean equals(final 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;
    }
}