Java by API/javax.swing.colorchooser/AbstractColorChooserPanel

extends AbstractColorChooserPanel

   <source lang="java">

import java.awt.Color; import java.awt.ruponent; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import javax.swing.Icon; import javax.swing.JColorChooser; import javax.swing.JComboBox; import javax.swing.JDialog; import javax.swing.colorchooser.AbstractColorChooserPanel; import javax.swing.colorchooser.ColorSelectionModel; public class MainClass {

 public static void main(String[] a) {
   final JColorChooser colorChooser = new JColorChooser();
   SystemColorChooserPanel newChooser = new SystemColorChooserPanel();
   colorChooser.addChooserPanel(newChooser);
   ActionListener okActionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       System.out.println(colorChooser.getColor());
     }
   };
   ActionListener cancelActionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       System.out.println("Cancel");
     }
   };
   final JDialog dialog = JColorChooser.createDialog(null, "Change Button Background", true,
       colorChooser, okActionListener, cancelActionListener);
   dialog.setVisible(true);
 }

} class SystemColorChooserPanel extends AbstractColorChooserPanel implements ItemListener {

 JComboBox comboBox;
 String labels[] = { "BLACK", "BLUE", "CYAN"};
 Color colors[] = { Color.BLACK, Color.BLUE, Color.CYAN};
 private void setColor(Color newColor) {
   int position = findColorPosition(newColor);
   comboBox.setSelectedIndex(position);
 }
 private int findColorLabel(Object label) {
   String stringLabel = label.toString();
   int position = -1;
   for (int i = 0, n = labels.length; i < n; i++) {
     if (stringLabel.equals(labels[i])) {
       position = i;
       break;
     }
   }
   return position;
 }
 private int findColorPosition(Color color) {
   int position = colors.length - 1;
   int colorRGB = color.getRGB();
   for (int i = 0, n = colors.length; i < n; i++) {
     if ((colors[i] != null) && (colorRGB == colors[i].getRGB())) {
       position = i;
       break;
     }
   }
   return position;
 }
 public void itemStateChanged(ItemEvent itemEvent) {
   int state = itemEvent.getStateChange();
   if (state == ItemEvent.SELECTED) {
     int position = findColorLabel(itemEvent.getItem());
     if ((position != -1) && (position != labels.length - 1)) {
       ColorSelectionModel selectionModel = getColorSelectionModel();
       selectionModel.setSelectedColor(colors[position]);
     }
   }
 }
 public String getDisplayName() {
   return "SystemColor";
 }
 public Icon getSmallDisplayIcon() {
   return new MyIcon(Color.BLUE);
 }
 public Icon getLargeDisplayIcon() {
   return new MyIcon(Color.GREEN);
 }
 protected void buildChooser() {
   comboBox = new JComboBox(labels);
   comboBox.addItemListener(this);
   add(comboBox);
 }
 public void updateChooser() {
   Color color = getColorFromModel();
   setColor(color);
 }

} class MyIcon implements Icon {

 Color myColor;
 public MyIcon(Color myColor) {
   this.myColor = myColor;
 }
 public int getIconWidth() {
   return 16;
 }
 public int getIconHeight() {
   return 16;
 }
 public void paintIcon(Component c, Graphics g, int x, int y) {
   g.setColor(myColor);
   g.drawRect(0, 0, 16, 16);
 }

}

      </source>