Mega Code Archive
How an icon is adapted to a component
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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
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.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class IconAdapterTester {
public static void main(String[] args) {
Icon icon = new MyIcon(300);
JComponent component = new IconAdapter(icon);
JFrame frame = new JFrame();
frame.add(component, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
class IconAdapter extends JComponent {
public IconAdapter(Icon icon) {
this.icon = icon;
}
public void paintComponent(Graphics g) {
icon.paintIcon(this, g, 0, 0);
}
public Dimension getPreferredSize() {
return new Dimension(icon.getIconWidth(), icon.getIconHeight());
}
private Icon icon;
}
class MyIcon implements Icon {
public MyIcon(int aWidth) {
width = aWidth;
}
public int getIconWidth() {
return width;
}
public int getIconHeight() {
return width / 2;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2 = (Graphics2D) g;
Rectangle2D.Double body = new Rectangle2D.Double(x, y + width / 6,
width - 1, width / 6);
Ellipse2D.Double frontTire = new Ellipse2D.Double(x + width / 6, y + width
/ 3, width / 6, width / 6);
Ellipse2D.Double rearTire = new Ellipse2D.Double(x + width * 2 / 3, y
+ width / 3, width / 6, width / 6);
g2.fill(frontTire);
g2.fill(rearTire);
g2.setColor(Color.BLACK);
g2.fill(body);
}
private int width;
}
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