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package horstmann.ch07_carbean;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
/**
A component that draws a car shape.
*/
@SuppressWarnings("serial")
public class CarBean extends JComponent
{
/**
Constructs a default car bean.
*/
public CarBean()
{
x = 0;
y = 0;
width = DEFAULT_CAR_WIDTH;
height = DEFAULT_CAR_HEIGHT;
}
/**
Sets the x property.
@param newValue the new x position
*/
public void setX(int newValue)
{
x = newValue;
repaint();
}
/**
Gets the x property.
@return the x position
*/
public int getX()
{
return x;
}
/**
Sets the y property.
@param newValue the new y position
*/
public void setY(int newValue)
{
y = newValue;
repaint();
}
/**
Gets the y property.
@return the y position
*/
public int getY()
{
return y;
}
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
Rectangle2D.Double body
= new Rectangle2D.Double(x, y + height / 3,
width - 1, height / 3);
Ellipse2D.Double frontTire
= new Ellipse2D.Double(x + width / 6,
y + height * 2 / 3, height / 3, height / 3);
Ellipse2D.Double rearTire
= new Ellipse2D.Double(x + width * 2 / 3,
y + height * 2 / 3, height / 3, height / 3);
// The bottom of the front windshield
Point2D.Double r1
= new Point2D.Double(x + width / 6, y + height / 3);
// The front of the roof
Point2D.Double r2
= new Point2D.Double(x + width / 3, y);
// The rear of the roof
Point2D.Double r3
= new Point2D.Double(x + width * 2 / 3, y);
// The bottom of the rear windshield
Point2D.Double r4
= new Point2D.Double(x + width * 5 / 6, y + height / 3);
Line2D.Double frontWindshield
= new Line2D.Double(r1, r2);
Line2D.Double roofTop
= new Line2D.Double(r2, r3);
Line2D.Double rearWindshield
= new Line2D.Double(r3, r4);
g2.draw(body);
g2.draw(frontTire);
g2.draw(rearTire);
g2.draw(frontWindshield);
g2.draw(roofTop);
g2.draw(rearWindshield);
}
public Dimension getPreferredSize()
{
return new Dimension(DEFAULT_PANEL_WIDTH,
DEFAULT_PANEL_HEIGHT);
}
private int x;
private int y;
private int width;
private int height;
private static final int DEFAULT_CAR_WIDTH = 60;
private static final int DEFAULT_CAR_HEIGHT = 30;
private static final int DEFAULT_PANEL_WIDTH = 160;
private static final int DEFAULT_PANEL_HEIGHT = 130;
}
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