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1 package thinlet.drafts;
2
3 import java.awt.*;
4 import java.util.*;
5
6 public class ChartBean extends Component {
7
8 private static int[] colors = { 0x2f505f, 0x207f00, 0x9fa0bf, 0x203f4f,
9 0xaf6030, 0x8f3f6f, 0xa03f4f, 0x907f40, 0x603fb0, 0xff8000 };
10 private static Random random = new Random();
11
12 private int[] values = new int[32];
13
14 public ChartBean() {
15 update();
16 }
17
18 public void paint(Graphics g) {
19 Dimension d = getSize();
20 g.setColor(Color.white);
21 g.fillRect(1, 1, d.width - 2, d.height - 2);
22 g.setColor(Color.lightGray);
23 g.drawRect(0, 0, d.width - 1, d.height - 1);
24 for (int i = 0; i < (d.width - 20) / 10; i++) {
25 int value = values[i % values.length] * (d.height - 20) / 100;
26 g.setColor(new Color(colors[i % colors.length]));
27 g.fillRect(10 + i * 10, d.height - value -10, 8, value);
28 }
29 }
30
31 public void update() {
32 for (int i = 0; i < values.length; i++) {
33 values[i] = 10 + Math.abs(random.nextInt() % 90);
34 }
35 }
36
37 public Dimension getPreferredSize() {
38 return new Dimension(240, 120);
39 }
40 } |
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