Last change
on this file since 297 was 2, checked in by Rick van der Zwet, 15 years ago |
Initial import of data of old repository ('data') worth keeping (e.g. tracking
means of URL access statistics)
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File size:
1.2 KB
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[2] | 1 | /*
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| 2 | * To change this template, choose Tools | Templates
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| 3 | * and open the template in the editor.
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| 4 | */
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| 5 |
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| 6 | package routegui;
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| 7 |
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| 8 | import java.awt.Graphics;
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| 9 | import javax.swing.JPanel;
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| 10 |
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| 11 | /**
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| 12 | *
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| 13 | * @author rick
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| 14 | */
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| 15 | public class Compass extends JPanel {
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| 16 | private int angle = 0;
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| 17 | private int margin = 10;
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| 18 |
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| 19 | @Override public void paintComponent(Graphics g) {
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| 20 | super.paintComponent(g); // paints background
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| 21 | int height = this.getHeight();
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| 22 | int width = this.getWidth();
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| 23 | g.drawOval(margin, margin,
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| 24 | height - (2 * margin), width - (2 * margin));
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| 25 | /* Make 0 degrees act like north */
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| 26 | double angle_rad = (angle - 90) * 2.0 * Math.PI/360.0;
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| 27 | int len = (height / 2) - 2 * margin;
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| 28 | int xMiddle = width / 2;
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| 29 | int yMiddle = height / 2;
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| 30 |
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| 31 | g.drawLine(xMiddle, yMiddle,
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| 32 | xMiddle + (int)(Math.cos(angle_rad) * len) ,
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| 33 | yMiddle + (int)(Math.sin(angle_rad) * len));
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| 34 | }
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| 35 | public void setAngle(int angleNew) {
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| 36 | angle = angleNew;
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| 37 | this.repaint();
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| 38 | }
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| 39 |
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| 40 | public void setMargin(int marginNew) {
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| 41 | margin = marginNew;
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| 42 | this.repaint();
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| 43 | }
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| 44 | }
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