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import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListCellRenderer;
import javax.swing.ToolTipManager;
import javax.swing.border.CompoundBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.MatteBorder;
public class ColorComboRenderer extends JPanel implements ListCellRenderer {
protected Color m_c = Color.black;
public ColorComboRenderer() {
super();
setBorder(new CompoundBorder(
new MatteBorder(2, 10, 2, 10, Color.white), new LineBorder(
Color.black)));
}
public Component getListCellRendererComponent(JList list, Object obj,
int row, boolean sel, boolean hasFocus) {
if (obj instanceof Color)
m_c = (Color) obj;
return this;
}
public void paint(Graphics g) {
setBackground(m_c);
super.paint(g);
}
public static void main(String[] a) {
JComboBox cbColor = new JComboBox();
int[] values = new int[] { 0, 128, 192, 255 };
for (int r = 0; r < values.length; r++)
for (int g = 0; g < values.length; g++)
for (int b = 0; b < values.length; b++) {
Color c = new Color(values[r], values[g], values[b]);
cbColor.addItem(c);
}
cbColor.setRenderer(new ColorComboRenderer());
JFrame f = new JFrame();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.getContentPane().add(cbColor);
f.pack();
f.setSize(new Dimension(300, 80));
f.show();
}
}
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