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annotate Clock.java @ 4:5080b65e6963

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Close MIDI sequencer and synthesizer properly and allow user to pass MIDI file directory as a command line argument Ignore-this: dbf86cc9008fba00379b67dd541adb38
author Marcus Pearce <m.pearce@gold.ac.uk>
date Thu, 18 Nov 2010 11:47:32 +0000
parents 4031cbb02f08
children 9fc8683b8fed
rev   line source
m@0 1 import java.awt.*;
m@0 2 import java.awt.geom.*;
m@0 3 import javax.swing.*;
m@0 4
m@0 5 /** Clocks displayed in a panel. */
m@0 6 public class Clock extends JPanel implements Runnable {
m@0 7
m@0 8 /* The default colours */
m@0 9 static final Color BACKGROUND = Color.black;
m@0 10 static final Color FOREGROUND = Color.white;
m@0 11
m@0 12 /* Panel width, height and border. */
m@0 13 public static final int WIDTH = 450;
m@0 14 public static final int BORDER = 50;
m@0 15
m@0 16 /* Minutes in a day. */
m@0 17 public static final int ONE_DAY = 24 * 60;
m@0 18
m@0 19 /* Show the clock? */
m@0 20 public Boolean showClock = false;
m@0 21 public Boolean showFullClock = false;
m@0 22
m@0 23 /* minutes since midnight, range 0 to (ONE_DAY - 1) inclusive */
m@0 24 private int minutes = 0;
m@0 25
m@0 26 /* Milliseconds per tick of the minute hand */
m@0 27 private long millisecondsPerTick = 1000;
m@0 28 public void setMillisecondsPerTick(long n) { millisecondsPerTick = n; }
m@0 29
m@0 30 /* Create a new Clock at time midnight. */
m@0 31 public Clock() {
m@0 32 this.setBackground(BACKGROUND);
m@0 33 this.setPreferredSize (new Dimension (WIDTH, WIDTH));
m@0 34 }
m@0 35
m@0 36 public void run() {
m@0 37 reset();
m@0 38 if (showClock == false) {
m@0 39 showClock = true;
m@0 40 repaint();
m@0 41 }
m@0 42 for (int i = 0; i < 60; i++) {
m@0 43 try { Thread.sleep (millisecondsPerTick); }
m@0 44 catch (InterruptedException e) {}
m@0 45 tick(1);
m@0 46 repaint();
m@0 47 }
m@4 48 showClock = false;
m@4 49 showFullClock = false;
m@4 50 reset();
m@4 51 repaint();
m@4 52 }
m@0 53
m@0 54 /* Move time on by 1 second. */
m@0 55 public void tick(int n) {
m@0 56 minutes = (minutes + n) % ONE_DAY;
m@0 57 }
m@0 58
m@0 59 /* Reset the clock to 00:00. */
m@0 60 public void reset() {
m@0 61 minutes = 0;
m@0 62 }
m@0 63
m@0 64 /* Draw the clock or fixation point. */
m@0 65 public void paintComponent (Graphics g) {
m@0 66 super.paintComponent (g);
m@0 67
m@0 68 if (showClock == true) {
m@0 69 paintClock(g);
m@0 70 } else {
m@0 71 paintFixationPoint(g);
m@0 72 }
m@0 73 }
m@0 74
m@0 75 private void paintFixationPoint(Graphics g) {
m@4 76 //System.out.println("paintFixationPoint");
m@0 77 int left_edge = BORDER;
m@0 78 int top = BORDER;
m@0 79 int diameter = WIDTH - (BORDER * 2);
m@0 80 int centrex = left_edge + (diameter / 2);
m@0 81 int centrey = top + (diameter / 2);
m@0 82
m@0 83 int linelength = diameter / 20;
m@0 84
m@0 85 g.setColor(FOREGROUND);
m@0 86 g.drawLine(centrey, centrex - linelength, centrey, centrex + linelength);
m@0 87 g.drawLine(centrey - linelength, centrex, centrey + linelength, centrex);
m@0 88 }
m@0 89
m@0 90 private void paintClock (Graphics g) {
m@4 91 //System.out.println("paintClock");
m@0 92 int minutes_angle = 90 - ((minutes % 60) * 6);
m@0 93 int hours_angle = 90 - ((minutes / 60) * 30);
m@0 94 int left_edge = BORDER;
m@0 95 int top = BORDER;
m@0 96 int diameter = WIDTH - (BORDER * 2);
m@0 97 int radius = diameter / 2;
m@0 98 int centrex = left_edge + radius;
m@0 99 int centrey = top + radius;
m@0 100
m@0 101 g.setColor(FOREGROUND);
m@0 102
m@0 103 // draw the clock as a black circle:
m@0 104 g.drawOval(left_edge, top, diameter, diameter);
m@0 105
m@0 106 // draw the hour numbers
m@0 107 int offset = 0;
m@0 108 for(int i = 1; i <= 12; i++) {
m@0 109 int hours_pos = 90 - (i * 30);
m@0 110 int x = (centrex - offset) +
m@0 111 (int)((radius - 5) * Math.cos(hours_pos * Math.PI / 180));
m@0 112 int y = (centrey + offset) -
m@0 113 (int)((radius - 5) * Math.sin(hours_pos * Math.PI / 180));
m@0 114 //g.drawString(String.valueOf(i), x, y);
m@0 115 g.drawOval(x, y, diameter / 200, diameter / 200);
m@0 116 }
m@0 117
m@0 118 // get the coordinate of the line_ends
m@0 119 int minutesx = (int)((radius - 5) *
m@0 120 Math.cos(minutes_angle * Math.PI / 180));
m@0 121 int minutesy = (int)((radius - 5) *
m@0 122 Math.sin(minutes_angle * Math.PI /180));
m@0 123
m@0 124 // draw the minutes' hand
m@0 125 g.drawLine(centrex, centrey, centrex + minutesx, centrey - minutesy);
m@0 126
m@0 127 int arc_angle = minutes_angle - 90;
m@0 128 Graphics2D g2 = (Graphics2D)g;
m@0 129 g2.setPaint(FOREGROUND);
m@0 130
m@0 131 //System.out.println("minutes_angle = " + minutes_angle +
m@0 132 // "; arc_angle = " + arc_angle);
m@0 133
m@0 134 if (arc_angle == 0 & showFullClock == true) {
m@0 135 g2.fillOval(left_edge, top, diameter, diameter);
m@0 136 showFullClock = false;
m@0 137 } else {
m@0 138 showFullClock = true;
m@0 139 if (arc_angle >= -180) {
m@0 140 Arc2D pie = new Arc2D.Float(centrex - radius, centrey - radius,
m@0 141 2 * radius, 2 * radius,
m@0 142 90, arc_angle,
m@0 143 Arc2D.PIE);
m@0 144 g2.fill(pie);
m@0 145 } else {
m@0 146 Arc2D pie1 = new Arc2D.Float(centrex - radius, centrey - radius,
m@0 147 2 * radius, 2 * radius,
m@0 148 90, -180, Arc2D.PIE);
m@0 149 Arc2D pie2 = new Arc2D.Float(centrex - radius, centrey - radius,
m@0 150 2 * radius, 2 * radius,
m@0 151 270, arc_angle + 180,
m@0 152 Arc2D.PIE);
m@0 153 g2.fill(pie1);
m@0 154 g2.fill(pie2);
m@0 155 }
m@0 156 }
m@0 157 }
m@0 158 }