ColorPickerDialog.java

/*
 * @(#)ColorPickerDialog.java
 *
 * $Date: 2011-02-24 00:42:26 -0600 (Thu, 24 Feb 2011) $
 *
 * Copyright (c) 2011 by Jeremy Wood.
 * All rights reserved.
 *
 * The copyright of this software is owned by Jeremy Wood. 
 * You may not use, copy or modify this software, except in  
 * accordance with the license agreement you entered into with  
 * Jeremy Wood. For details see accompanying license terms.
 * 
 * This software is probably, but not necessarily, discussed here:
 * http://javagraphics.java.net/
 * 
 * That site should also contain the most recent official version
 * of this software.  (See the SVN repository for more details.)
 */
package colorpicker.swing;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComponent;
import javax.swing.JDialog;

/**
 * This wraps a <code>ColorPicker</code> in a simple dialog with "OK" and
 * "Cancel" options.
 * <P>
 * (This object is used by the static calls in <code>ColorPicker</code> to show
 * a dialog.)
 * 
 */
class ColorPickerDialog extends JDialog {

	private static final long serialVersionUID = 2L;

	ColorPicker cp;
	int alpha;
	Color returnValue = null;
	ActionListener okListener = new ActionListener() {
		public void actionPerformed(ActionEvent e) {
			returnValue = cp.getColor();
		}
	};

	DialogFooter footer;

	public ColorPickerDialog(Frame owner, Color color, boolean includeOpacity) {
		super(owner);
		initialize(owner, color, includeOpacity);
	}

	public ColorPickerDialog(Dialog owner, Color color, boolean includeOpacity) {
		super(owner);
		initialize(owner, color, includeOpacity);
	}

	private void initialize(Component owner, Color color, boolean includeOpacity) {
		cp = new ColorPicker(true, includeOpacity);
		setModal(true);
		setResizable(false);
		getContentPane().setLayout(new GridBagLayout());
		GridBagConstraints c = new GridBagConstraints();
		c.gridx = 0;
		c.gridy = 0;
		c.weightx = 1;
		c.weighty = 1;
		c.fill = GridBagConstraints.BOTH;
		c.gridwidth = GridBagConstraints.REMAINDER;
		c.insets = new Insets(10, 10, 10, 10);
		getContentPane().add(cp, c);
		c.gridy++;
		footer = DialogFooter.createDialogFooter(new JComponent[] {},
				DialogFooter.OK_CANCEL_OPTION, DialogFooter.OK_OPTION,
				DialogFooter.ESCAPE_KEY_TRIGGERS_CANCEL);
		c.gridy++;
		c.weighty = 0;
		getContentPane().add(footer, c);
		cp.setRGB(color.getRed(), color.getGreen(), color.getBlue());
		cp.setOpacity(color.getAlpha());
		alpha = color.getAlpha();
		pack();
		setLocationRelativeTo(owner);

		footer.getButton(DialogFooter.OK_OPTION).addActionListener(okListener);
	}

	/**
	 * @return the color committed when the user clicked 'OK'. Note this returns
	 *         <code>null</code> if the user canceled this dialog, or exited via
	 *         the close decoration.
	 */
	public Color getColor() {
		return returnValue;
	}
}