org.openaltimeter.desktopapp.annotations.XYDotAnnotation.java Source code

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Here is the source code for org.openaltimeter.desktopapp.annotations.XYDotAnnotation.java

Source

/*
openaltimeter -- an open-source altimeter for RC aircraft
Copyright (C) 2010-2011  Jony Hudson
http://openaltimeter.org
    
This program 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 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 General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.openaltimeter.desktopapp.annotations;

import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;

import org.jfree.chart.annotations.AbstractXYAnnotation;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.ui.RectangleEdge;

public class XYDotAnnotation extends AbstractXYAnnotation {

    private double x;
    private double y;
    private double size;
    private Paint color;

    public XYDotAnnotation(double x, double y, double size, Paint color) {
        super();
        this.x = x;
        this.y = y;
        this.size = size;
        this.color = color;
    }

    /* Based on XYTextAnnotation draw method */
    @Override
    public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis,
            int rendererIndex, PlotRenderingInfo info) {
        PlotOrientation orientation = plot.getOrientation();
        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(plot.getDomainAxisLocation(), orientation);
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(plot.getRangeAxisLocation(), orientation);

        float anchorX = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
        float anchorY = (float) rangeAxis.valueToJava2D(y, dataArea, rangeEdge);

        if (orientation == PlotOrientation.HORIZONTAL) {
            float tempAnchor = anchorX;
            anchorX = anchorY;
            anchorY = tempAnchor;
        }

        // dot drawing
        g2.setPaint(color);
        g2.setStroke(new BasicStroke(1.0f));
        Ellipse2D e = new Ellipse2D.Double(anchorX - size / 2, anchorY - size / 2, size, size);
        g2.fill(e);
    }

}