/*

 * 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) 2009, 2012, Oracle and/or its affiliates. All rights reserved.

 */

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

import java.awt.*;

import javax.swing.*;

import com.oracle.solaris.vp.util.misc.finder.Finder;

@SuppressWarnings({"serial"})

public class ScaledIconPanel extends JPanel {

    //

    // Private methods

    //

    private ScaledIcon sIcon;

    private boolean presAspectRatio;

    private int hAlign;

    private int vAlign;

    //

    // Constructors

    //

    public ScaledIconPanel(Icon icon, boolean presAspectRatio, int hAlign,

	int vAlign) {

	sIcon = new ScaledIcon(icon);

	setPreserveAspectRatio(presAspectRatio);

	setHorizontalAlignment(hAlign);

	setVerticalAlignment(vAlign);

    }

    public ScaledIconPanel(Icon icon, boolean presAspectRatio) {

	this(icon, presAspectRatio, SwingConstants.CENTER,

	    SwingConstants.CENTER);

    }

    public ScaledIconPanel(Icon icon) {

	this(icon, false);

    }

    public ScaledIconPanel() {

	this(null);

    }

    //

    // Component methods

    //

    @Override

    public Dimension getPreferredSize() {

	if (isPreferredSizeSet()) {

	    return super.getPreferredSize();

	}

	Insets insets = getInsets();

	Icon icon = sIcon.getIcon();

	int width = icon.getIconWidth() + insets.left + insets.right;

	int height = icon.getIconHeight() + insets.top + insets.bottom;

	return new Dimension(width, height);

    }

    //

    // JComponent methods

    //

    @Override

    protected void paintComponent(Graphics g) {

	super.paintComponent(g);

	Insets insets = getInsets();

	int width = getWidth() - insets.left - insets.right;

	int height = getHeight() - insets.top - insets.bottom;

	int iWidth = width;

	int iHeight = height;

	int x = insets.left;

	int y = insets.top;

	if (getPreserveAspectRatio()) {

	    Icon icon = sIcon.getIcon();

	    float ratio = (float)icon.getIconWidth() / icon.getIconHeight();

	    float curRatio = (float)iWidth / iHeight;

	    if (ratio > curRatio) {

		iHeight = (int)(iWidth / ratio);

	    } else {

		iWidth = (int)(iHeight * ratio);

	    }

	    switch (getHorizontalAlignment()) {

		case SwingConstants.LEFT:

		    // Do nothing

		break;

		case SwingConstants.RIGHT:

		    x += (width - iWidth);

		break;

		default:

		case SwingConstants.CENTER:

		    x += (width - iWidth) / 2;

		break;

	    }

	    switch (getVerticalAlignment()) {

		case SwingConstants.TOP:

		    // Do nothing

		break;

		case SwingConstants.BOTTOM:

		    y += (height - iHeight);

		break;

		default:

		case SwingConstants.CENTER:

		    y += (height - iHeight) / 2;

		break;

	    }

	}

	sIcon.setIconWidth(iWidth);

	sIcon.setIconHeight(iHeight);

	sIcon.paintIcon(this, g, x, y);

    }

    //

    // ScaledIconPanel methods

    //

    public int getHorizontalAlignment() {

	return hAlign;

    }

    public boolean getPreserveAspectRatio() {

	return presAspectRatio;

    }

    public ScaledIcon getScaledIcon() {

	return sIcon;

    }

    public int getVerticalAlignment() {

	return vAlign;

    }

    public void setHorizontalAlignment(int hAlign) {

	this.hAlign = hAlign;

    }

    public void setIcon(Icon icon) {

	sIcon.setIcon(icon);

    }

    public void setPreserveAspectRatio(boolean presAspectRatio) {

	this.presAspectRatio = presAspectRatio;

    }

    public void setVerticalAlignment(int vAlign) {

	this.vAlign = vAlign;

    }

    //

    // Static methods

    //

    /**

     * Unit test.

     */

    public static void main(String[] args) {

	Icon icon = Finder.getIcon("images/dialog/dialog-error.png");

	ScaledIconPanel panel = new ScaledIconPanel(icon, true);

	panel.setBorder(GUIUtil.getEmptyBorder());

	JFrame frame = new JFrame();

	Container c = frame.getContentPane();

	c.setLayout(new BorderLayout());

	c.add(panel, BorderLayout.CENTER);

	frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

	frame.pack();

	frame.setVisible(true);

    }

}