01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
package horstmann.ch09_animation1;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
/**
This component draws an array and marks two elements in the
array.
*/
@SuppressWarnings("serial")
public class ArrayComponent extends JComponent
{
public synchronized void paintComponent(Graphics g)
{
if (values == null) return;
Graphics2D g2 = (Graphics2D) g;
int width = getWidth() / values.length;
for (int i = 0; i < values.length; i++)
{
Double v = values[i];
Rectangle2D bar = new Rectangle2D.Double(
width * i, 0, width, v);
if (v == marked1 || v == marked2)
g2.fill(bar);
else
g2.draw(bar);
}
}
/**
Sets the values to be painted.
@param values the array of values to display
@param marked1 the first marked element
@param marked2 the second marked element
*/
public synchronized void setValues(Double[] values,
Double marked1, Double marked2)
{
this.values = values.clone();
this.marked1 = marked1;
this.marked2 = marked2;
repaint();
}
private Double[] values;
private Double marked1;
private Double marked2;
}
|
