SystemColorChooserPanel.java Source code

Introduction

Here is the source code for SystemColorChooserPanel.java

Source

import java.awt.Color;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.colorchooser.AbstractColorChooserPanel;
import javax.swing.colorchooser.ColorSelectionModel;

class SystemColorChooserPanel extends AbstractColorChooserPanel implements ItemListener {
    private static int NOT_FOUND = -1;

    JComboBox comboBox;
    String labels[] = { "BLACK", "BLUE", "CYAN", "<Custom>" };
    Color colors[] = { Color.BLACK, Color.BLUE, Color.CYAN, null };

    private void setColor(Color newColor) {
        int position = findColorPosition(newColor);
        comboBox.setSelectedIndex(position);
    }

    private int findColorLabel(Object label) {
        String stringLabel = label.toString();
        int position = NOT_FOUND;
        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 != NOT_FOUND) && (position != labels.length - 1)) {
                ColorSelectionModel selectionModel = getColorSelectionModel();
                selectionModel.setSelectedColor(colors[position]);
            }
        }
    }

    public String getDisplayName() {
        return "SystemColor";
    }

    public Icon getSmallDisplayIcon() {
        return new ImageIcon("yourFile.gif");
    }

    public Icon getLargeDisplayIcon() {
        return new ImageIcon("yourFile.gif");
    }

    protected void buildChooser() {
        comboBox = new JComboBox(labels);
        comboBox.addItemListener(this);
        add(comboBox);
    }

    public void updateChooser() {
        Color color = getColorFromModel();
        setColor(color);
    }
}

public class JColorChooserWithCustomSelectionPanel {

    public static void main(String[] a) {

        JColorChooser colorChooser = new JColorChooser();
        colorChooser.addChooserPanel(new SystemColorChooserPanel());

        JDialog d = colorChooser.createDialog(null, "", true, colorChooser, null, null);

        d.setVisible(true);
    }

}