net.sf.mzmine.modules.visualization.scatterplot.scatterplotchart.ScatterPlotRenderer.java Source code

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Here is the source code for net.sf.mzmine.modules.visualization.scatterplot.scatterplotchart.ScatterPlotRenderer.java

Source

/*
 * Copyright 2006-2014 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 * 
 * MZmine 2 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * MZmine 2; if not, write to the Free Software Foundation, Inc., 51 Franklin St,
 * Fifth Floor, Boston, MA 02110-1301 USA
 */

package net.sf.mzmine.modules.visualization.scatterplot.scatterplotchart;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;

import javax.swing.SwingUtilities;

import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.XYItemLabelGenerator;
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.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;

public class ScatterPlotRenderer extends XYLineAndShapeRenderer {

    private static final Shape dataPointsShape = new Ellipse2D.Float(-2.5f, -2.5f, 5, 5);

    public static final Color pointColor = Color.blue;
    public static final Color searchColor = Color.orange;

    public static final AlphaComposite pointAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);

    public static final AlphaComposite selectionAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.9f);

    public ScatterPlotRenderer() {

        super(false, true);

        ScatterPlotToolTipGenerator toolTipGenerator = new ScatterPlotToolTipGenerator();
        setBaseToolTipGenerator(toolTipGenerator);

        XYItemLabelGenerator ItemlabelGenerator = new ScatterPlotItemLabelGenerator();
        setBaseItemLabelGenerator(ItemlabelGenerator);
        setBaseItemLabelFont(new Font("SansSerif", Font.BOLD, 11));
        setBaseItemLabelPaint(Color.black);
        setBaseItemLabelsVisible(false);

        setSeriesItemLabelsVisible(0, false);
        setSeriesPaint(0, pointColor);
        setSeriesShape(0, dataPointsShape);

        setSeriesItemLabelsVisible(1, false);
        setSeriesPaint(1, searchColor);
        setSeriesShape(1, dataPointsShape);

    }

    public void drawItem(java.awt.Graphics2D g2, XYItemRendererState state, java.awt.geom.Rectangle2D dataArea,
            PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,
            int series, int item, CrosshairState crosshairState, int pass) {

        if (series == 0)
            g2.setComposite(pointAlpha);
        else
            g2.setComposite(selectionAlpha);

        super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item,
                crosshairState, pass);
    }

    /**
     * Draws an item label.
     * 
     * @param g2
     *            the graphics device.
     * @param orientation
     *            the orientation.
     * @param dataset
     *            the dataset.
     * @param series
     *            the series index (zero-based).
     * @param item
     *            the item index (zero-based).
     * @param x
     *            the x coordinate (in Java2D space).
     * @param y
     *            the y coordinate (in Java2D space).
     * @param negative
     *            indicates a negative value (which affects the item label
     *            position).
     */
    protected void drawItemLabel(Graphics2D g2, PlotOrientation orientation, XYDataset dataset, int series,
            int item, double x, double y, boolean negative) {

        XYItemLabelGenerator generator = getItemLabelGenerator(series, item);
        Font labelFont = getItemLabelFont(series, item);
        g2.setFont(labelFont);
        String label = generator.generateLabel(dataset, series, item);

        if ((label == null) || (label.length() == 0))
            return;

        // get the label position..
        ItemLabelPosition position = null;
        if (!negative) {
            position = getPositiveItemLabelPosition(series, item);
        } else {
            position = getNegativeItemLabelPosition(series, item);
        }

        // work out the label anchor point...
        Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), x, y, orientation);

        FontMetrics metrics = g2.getFontMetrics(labelFont);
        int width = SwingUtilities.computeStringWidth(metrics, label) + 2;
        int height = metrics.getHeight();

        int X = (int) (anchorPoint.getX() - (width / 2));
        int Y = (int) (anchorPoint.getY() - (height));

        g2.setPaint(searchColor);
        g2.fillRect(X, Y, width, height);

        super.drawItemLabel(g2, orientation, dataset, series, item, x, y, negative);

    }

}