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1 package junit.awtui;
2
3 import java.awt.Canvas  ;
4 import java.awt.Color ;
5 import java.awt.Graphics ;
6 import java.awt.Rectangle ;
7 import java.awt.SystemColor ;
8
9 public class ProgressBar extends Canvas {
10 public boolean fError= false;
11 public int fTotal= 0;
12 public int fProgress= 0;
13 public int fProgressX= 0;
14
15 public ProgressBar() {
16 super();
17 setSize(20, 30);
18 }
19
20 private Color getStatusColor() {
21 if (fError)
22 return Color.red;
23 return Color.green;
24 }
25
26 public void paint(Graphics g) {
27 paintBackground(g);
28 paintStatus(g);
29 }
30
31 public void paintBackground(Graphics g) {
32 g.setColor(SystemColor.control);
33 Rectangle r= getBounds();
34 g.fillRect(0, 0, r.width, r.height);
35 g.setColor(Color.darkGray);
36 g.drawLine(0, 0, r.width-1, 0);
37 g.drawLine(0, 0, 0, r.height-1);
38 g.setColor(Color.white);
39 g.drawLine(r.width-1, 0, r.width-1, r.height-1);
40 g.drawLine(0, r.height-1, r.width-1, r.height-1);
41 }
42
43 public void paintStatus(Graphics g) {
44 g.setColor(getStatusColor());
45 Rectangle r= new Rectangle (0, 0, fProgressX, getBounds().height);
46 g.fillRect(1, 1, r.width-1, r.height-2);
47 }
48
49 private void paintStep(int startX, int endX) {
50 repaint(startX, 1, endX-startX, getBounds().height-2);
51 }
52
53 public void reset() {
54 fProgressX= 1;
55 fProgress= 0;
56 fError= false;
57 paint(getGraphics());
58 }
59
60 public int scale(int value) {
61 if (fTotal > 0)
62 return Math.max(1, value*(getBounds().width-1)/fTotal);
63 return value;
64 }
65
66 public void setBounds(int x, int y, int w, int h) {
67 super.setBounds(x, y, w, h);
68 fProgressX= scale(fProgress);
69 }
70
71 public void start(int total) {
72 fTotal= total;
73 reset();
74 }
75
76 public void step(boolean successful) {
77 fProgress++;
78 int x= fProgressX;
79
80 fProgressX= scale(fProgress);
81
82 if (!fError && !successful) {
83 fError= true;
84 x= 1;
85 }
86 paintStep(x, fProgressX);
87 }
88 } |
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