Interactive graphics - An Introduction to Graphical User Interfaces with Java Swing - page 69

File: its/InteractiveGraphic/InteractivePanel.java

package its.InteractiveGraphic; 1.

2.
3. import java.awt.Color;

4.

import java.awt.Dimension;

5.

import java.awt.Graphics;

6.

import javax.swing.JPanel;

7.
8.

public class InteractivePanel extends JPanel

9.

{

10.
11.

private CircleAdministration circleAdm;

12.

private double radius = 6.0;

13.
14.

public InteractivePanel()

15.

{

16.

circleAdm = new CircleAdministration();

17.

this .setBackground(Color.white);

18.

this .setPreferredSize( new Dimension(300,300));

} 19.

20.
21. public void paintComponent(Graphics g)

{ 22.

super .paintComponent(g); 23.

circleAdm.drawAll(g); 24.

} 25.

26.
27.

public void addCircle( int x, int y)

28.

{

29.

circleAdm.addCircle( new Circle(x,y,radius));

30.

repaint();

31.

}

32.
33.

public void removeNearestCircle( int x, int y)

34.

{

35.

circleAdm.removeNearestCircle(x,y);

36.

repaint();

37.

}

38.
39.

public int getNoOfCircles()

40.

{

return (circleAdm.getNoOfCircles()); 41.

} 42.

} 43.