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

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Here is the source code for com.rapidminer.gui.plotter.charts.ColorizedShapeItemRenderer.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.plotter.ColorProvider;

import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;

import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRendererState;
import org.jfree.chart.renderer.xy.XYShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYZDataset;
import org.jfree.util.ShapeUtilities;

/**
 * This renderer provides colorized renderering not based on the series but on a numerical value.
 * 
 * @author Ingo Mierswa
 */
public class ColorizedShapeItemRenderer extends XYShapeRenderer {

    private static final long serialVersionUID = 1110895790394519633L;

    private double minColor;

    private double maxColor;

    private ColorProvider colorProvider = new ColorProvider(true);

    public ColorizedShapeItemRenderer(double minColor, double maxColor) {
        super();
        this.minColor = minColor;
        this.maxColor = maxColor;
    }

    /**
     * Draws the block representing the specified item.
     * 
     * @param g2
     *            the graphics device.
     * @param state
     *            the state.
     * @param dataArea
     *            the data area.
     * @param info
     *            the plot rendering info.
     * @param plot
     *            the plot.
     * @param domainAxis
     *            the x-axis.
     * @param rangeAxis
     *            the y-axis.
     * @param dataset
     *            the dataset.
     * @param series
     *            the series index.
     * @param item
     *            the item index.
     * @param crosshairState
     *            the crosshair state.
     * @param pass
     *            the pass index.
     */
    @Override
    public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info,
            XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item,
            CrosshairState crosshairState, int pass) {

        Shape hotspot = null;
        EntityCollection entities = null;
        if (info != null) {
            entities = info.getOwner().getEntityCollection();
        }

        double x = dataset.getXValue(series, item);
        double y = dataset.getYValue(series, item);
        double colorValue = ((XYZDataset) dataset).getZValue(series, item);
        double normalized = (colorValue - minColor) / (maxColor - minColor);

        if (Double.isNaN(x) || Double.isNaN(y)) {
            // can't draw anything
            return;
        }

        double transX = domainAxis.valueToJava2D(x, dataArea, plot.getDomainAxisEdge());
        double transY = rangeAxis.valueToJava2D(y, dataArea, plot.getRangeAxisEdge());

        PlotOrientation orientation = plot.getOrientation();

        Shape shape = getItemShape(series, item);
        if (orientation == PlotOrientation.HORIZONTAL) {
            shape = ShapeUtilities.createTranslatedShape(shape, transY, transX);
        } else if (orientation == PlotOrientation.VERTICAL) {
            shape = ShapeUtilities.createTranslatedShape(shape, transX, transY);
        }
        hotspot = shape;
        if (shape.intersects(dataArea)) {
            g2.setPaint(colorProvider.getPointColor(normalized));
            g2.fill(shape);
            if (getDrawOutlines()) {
                if (getUseOutlinePaint()) {
                    g2.setPaint(getItemOutlinePaint(series, item));
                } else {
                    g2.setPaint(getItemPaint(series, item));
                }
                g2.setStroke(getItemOutlineStroke(series, item));
                g2.draw(shape);
            }
        }

        // add an entity for the item...
        if (entities != null) {
            addEntity(entities, hotspot, dataset, series, item, transX, transY);
        }
    }
}