it.alus.GPSreceiver.instruments.Compass.java Source code

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Here is the source code for it.alus.GPSreceiver.instruments.Compass.java

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//============================================================================
// This file is part of GPSreceiver: a Java demo program that parses NMEA
// sentences from a serial GPS receiver and displays live the received data.
// Author         : Alberto Realis-Luc <alberto.realisluc@gmail.com>
// Since          : July 2010
// Web            : http://www.alus.it/airnavigator/gpsreceiver/
// Git Repository : https://github.com/alus-it/GPSreceiver.git
// Version        : 0.1
// Copyright      :  2010 Alberto Realis-Luc
// License        : GPL
// Last change    : 2 March 2011
//============================================================================

package it.alus.GPSreceiver.instruments;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
//import java.awt.Image;
//import java.awt.Toolkit;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.dial.DialBackground;
import org.jfree.chart.plot.dial.DialCap;
import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.DialTextAnnotation;
import org.jfree.chart.plot.dial.DialValueIndicator;
import org.jfree.chart.plot.dial.StandardDialFrame;
import org.jfree.chart.plot.dial.StandardDialScale;
import org.jfree.chart.plot.dial.DialPointer.Pointer;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.ui.TextAnchor;

public class Compass extends ChartPanel {
    private static final long serialVersionUID = 6212084781783666549L;
    private JFreeChart jChart;
    private DefaultValueDataset dataset;
    private StandardDialScale realScale;
    private StandardDialScale dispScale;
    private DialTextAnnotation N, S, W, E;
    private boolean isTrueTrack;

    public Compass(boolean trueTrack) {
        super(null);
        isTrueTrack = trueTrack;
        dataset = new DefaultValueDataset(0.0);
        DialPlot plot = new DialPlot();
        //Image background=Toolkit.getDefaultToolkit().getImage(getClass().getResource("heading.png"));
        //plot.setBackgroundImage(background);
        plot.setView(0.0, 0.0, 1.0, 1.0);
        plot.setDataset(0, dataset);
        StandardDialFrame dialFrame = new StandardDialFrame();
        dialFrame.setBackgroundPaint(Color.lightGray);
        dialFrame.setForegroundPaint(Color.gray);
        N = new DialTextAnnotation("N");
        N.setFont(new Font("Arial", 1, 32));
        N.setPaint(Color.white);
        N.setAnchor(TextAnchor.CENTER);
        plot.addLayer(N);
        S = new DialTextAnnotation("S");
        S.setFont(new Font("Arial", 1, 32));
        S.setPaint(Color.white);
        S.setAnchor(TextAnchor.CENTER);
        plot.addLayer(S);
        W = new DialTextAnnotation("W");
        W.setFont(new Font("Arial", 1, 32));
        W.setPaint(Color.white);
        W.setAnchor(TextAnchor.CENTER);
        plot.addLayer(W);
        E = new DialTextAnnotation("E");
        E.setFont(new Font("Arial", 1, 32));
        E.setPaint(Color.white);
        E.setAnchor(TextAnchor.CENTER);
        plot.addLayer(E);
        repositionDirectionsLabels(90);
        DialValueIndicator valueindicator = new DialValueIndicator(0);
        plot.addLayer(valueindicator);
        plot.setDialFrame(dialFrame);
        realScale = new StandardDialScale(0, 360, 90, -360, 30, 6);
        realScale.setVisible(false);
        realScale.setFirstTickLabelVisible(false);
        plot.addScale(0, realScale);
        dispScale = new StandardDialScale(0, 36, 90, -360, 3, 15);
        dispScale.setFirstTickLabelVisible(false);
        dispScale.setMajorTickPaint(Color.white);
        dispScale.setMinorTickPaint(Color.lightGray);
        dispScale.setFirstTickLabelVisible(true);
        dispScale.setTickRadius(0.88);
        dispScale.setTickLabelOffset(0.15);
        NumberFormat formatter = new DecimalFormat("#");
        dispScale.setTickLabelFormatter(formatter);
        dispScale.setTickLabelFont(new Font("Arial", Font.BOLD, 22));
        dispScale.setTickLabelPaint(Color.white);
        plot.addScale(1, dispScale);
        plot.setBackground(new DialBackground(Color.black));
        Pointer needle = new Pointer(0);
        needle.setFillPaint(Color.red);
        needle.setRadius(0.8);
        plot.addLayer(needle);
        plot.mapDatasetToScale(1, 1);
        DialCap cap = new DialCap();
        cap.setRadius(0.05);
        cap.setFillPaint(Color.gray);
        plot.setCap(cap);
        jChart = new JFreeChart(plot);
        //jChart.setBackgroundImage(background);
        super.setChart(jChart);
        super.setPreferredSize(new Dimension(400, 400));
    }

    public void updateDirection(float trueTrack, float magneticTrack) {
        float newDirection;
        if (isTrueTrack)
            newDirection = trueTrack;
        else
            newDirection = magneticTrack;
        if (newDirection >= 0 && newDirection <= 360) {
            float northAngle = newDirection + 90;
            realScale.setStartAngle(northAngle);
            dispScale.setStartAngle(northAngle);
            dispScale.setFirstTickLabelVisible(false);
            repositionDirectionsLabels(northAngle);
            dataset.setValue(newDirection);
        }
    }

    private void repositionDirectionsLabels(float angle) {
        float base = 0.56F;
        N.setAngle(angle);
        N.setRadius(base);
        angle = angle + 90;
        W.setAngle(angle);
        W.setRadius(base);
        angle = angle + 90;
        S.setAngle(angle);
        S.setRadius(base);
        angle = angle + 90;
        E.setAngle(angle);
        E.setRadius(base);
    }

    public void setTrueTrack(boolean isTrueTrack) {
        this.isTrueTrack = isTrueTrack;
    }

    public boolean isTrueTrack() {
        return isTrueTrack;
    }

}