/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.

 */

package com.oracle.solaris.vp.util.swing;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import org.jdesktop.animation.timing.*;

@SuppressWarnings({"serial"})

public class CollapsiblePane extends JViewport implements TimingTarget {

    //

    // Enums

    //

    public enum Direction {

	NORTH, SOUTH, EAST, WEST

    }

    //

    // Static data

    //

    public static final Direction _DIRECTION = Direction.NORTH;

    //

    // Instance data

    //

    private AnimatedBooleanProperty collapsed =

	new AnimatedBooleanProperty(300, this);

    private Direction direction;

    //

    // Constructors

    //

    public CollapsiblePane(Direction direction) {

	this.direction = direction;

    }

    public CollapsiblePane(Component c, Direction direction) {

	this(direction);

	setView(c);

    }

    public CollapsiblePane() {

	this(_DIRECTION);

    }

    public CollapsiblePane(Component c) {

	this(c, _DIRECTION);

    }

    //

    // TimingTarget methods

    //

    @Override

    public void begin() {

	// No implementation here -- setup should occur before the animator is

	// started since the clock is ticking at this point.  A design flaw in

	// the timing framework?  Perhaps.

    }

    @Override

    public void end() {

    }

    @Override

    public void repeat() {

    }

    @Override

    public void timingEvent(float fraction) {

	fraction = 1f - fraction;

	Direction direction = getDirection();

	Dimension d = null;

	// If the pane is completely collapsed, mark the view as invisible

	Component view = getView();

	view.setVisible(fraction != 0f);

	if (fraction != 1f) {

	    d = view.getPreferredSize();

	    switch (getDirection()) {

		case NORTH:

		    int vHeight = d.height;

		    d.height *= fraction;

		    setViewPosition(new Point(0, vHeight));

		    break;

		case SOUTH:

		    d.height *= fraction;

		    break;

		case WEST:

		    int vWidth = d.width;

		    d.width *= fraction;

		    setViewPosition(new Point(vWidth, 0));

		    break;

		case EAST:

		    d.width *= fraction;

		    break;

	    }

	}

	// d must be null when fully expanded (fraction == 1) so that if the

	// view resizes at some point, this CollapsiblePane automatically

	// resizes with it

	setPreferredSize(d);

	revalidate();

	repaint();

    }

    //

    // CollapsiblePane methods

    //

    public Animator getAnimator() {

	return collapsed.getAnimator();

    }

    public boolean isCollapsed() {

	return collapsed.getValue();

    }

    public void setCollapsed(boolean value) {

	collapsed.setValue(value, isShowing());

    }

    public void setCollapsed(boolean value, boolean animated) {

	collapsed.setValue(value, animated);

    }

    public Direction getDirection() {

	return direction;

    }

    //

    // Static methods

    //

    // XXX Unit test - remove

    public static void main(String args[]) {

	JButton big = new JButton("big");

	big.setPreferredSize(new Dimension(500, 500));

	final CollapsiblePane cPane = new CollapsiblePane(big, Direction.NORTH);

	JButton b = new JButton("collapse");

	b.addActionListener(

	    new ActionListener() {

		@Override

		public void actionPerformed(ActionEvent e) {

		    boolean collapsed = cPane.isCollapsed();

		    cPane.setCollapsed(!collapsed);

		}

	    });

	ExtFrame frame = new ExtFrame();

	frame.setAutoResizeEnabled(true);

	Container c = frame.getContentPane();

	c.setLayout(new BorderLayout());

	c.add(cPane, BorderLayout.NORTH);

	c.add(b, BorderLayout.SOUTH);

	frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

	frame.pack();

	frame.setVisible(true);

    }

}