package combo;
/*
* ColorboxDemo.java
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ColorboxDemo extends JFrame {
private JToolBar toolbar;
private ColorBox colorBox;
public ColorboxDemo() {
super("Combo Colors Demo");
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
toolbar = new JToolBar();
//Create the ColorBox:
colorBox = new ColorBox();
//Layout:
toolbar.add(colorBox, BorderLayout.NORTH);
getContentPane().add(toolbar, BorderLayout.NORTH);
pack();
setLocationRelativeTo(null);
//Listener:
colorBox.addItemListener(new ItemListener() {
public void itemStateChanged(final ItemEvent e) {
colorBoxItemStateChanged(e);
}
});
}
private void colorBoxItemStateChanged(final ItemEvent e){
if(e.getStateChange() == ItemEvent.DESELECTED) return;
int selectedIndex = colorBox.getSelectedIndex();
System.out.println(colorBox.LABELS[selectedIndex]+" "+colorBox.COLORS[selectedIndex]);
}
public static void main(final String args[]) {new ColorboxDemo().setVisible(true);}
}
class ColorBox extends JComboBox{
private final Icon[] COLOR_ICONS;
public final String LABELS[] = {
"BLACK","BLUE","CYAN","DARK_GRAY","GRAY","GREEN","LIGHT_GRAY",
"MAGENTA","ORANGE","PINK","RED","WHITE","YELLOW"
};
public final Color COLORS[] = {
Color.BLACK,Color.BLUE,Color.CYAN,Color.DARK_GRAY,Color.GRAY,Color.GREEN,Color.LIGHT_GRAY,
Color.MAGENTA,Color.ORANGE,Color.PINK,Color.RED,Color.WHITE,Color.YELLOW
};
public ColorBox(){
super();
//Load the COLOR_ICONS and create an array of indexes:
COLOR_ICONS = new Icon[LABELS.length];
final Integer[] INT_ARRAY = new Integer[LABELS.length];
for (int i = 0; i < LABELS.length; i++) {
INT_ARRAY[i] = new Integer(i);
COLOR_ICONS[i] = new ColorIcon(COLORS[i], new Dimension(100, 20));
}
setModel(new DefaultComboBoxModel(INT_ARRAY));
setRenderer(new ComboBoxRenderer());
}
class ComboBoxRenderer extends JLabel implements ListCellRenderer {
public ComboBoxRenderer() {setOpaque(true);}
public Component getListCellRendererComponent(
final JList list, final Object value, final int index,
final boolean isSelected, final boolean cellHasFocus) {
setBackground(list.getBackground());
setForeground(list.getForeground());
if (isSelected) {
setBackground(list.getSelectionBackground());
setForeground(list.getSelectionForeground());
}
//Set the icon and text:
int selectedIndex = ((Integer)value).intValue();
setIcon(COLOR_ICONS[selectedIndex]);
setText(LABELS[selectedIndex]);
return this;
}
}
class ColorIcon implements Icon {
final private Color color;
final private Dimension size;
public ColorIcon(final Color color, final Dimension size) {
this.color = color;
this.size = size;
}
public void paintIcon(final Component c, final Graphics g, final int x, final int y) {
g.setColor(color);
g.fillRect(x, y, getIconWidth(), getIconHeight());
}
public int getIconWidth() {return size.width;}
public int getIconHeight() {return size.height;}
}
}
