/*
 * Copyright (c) 2001-2011 JGoodies Karsten Lentzsch. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  o Neither the name of JGoodies Karsten Lentzsch nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jgoodies.looks.plastic;

import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.metal.MetalToolBarUI;

import com.jgoodies.looks.BorderStyle;
import com.jgoodies.looks.HeaderStyle;
import com.jgoodies.looks.Options;

/**
 * The JGoodies Plastic look and feel implementation of {@code ToolBarUI}.<p>
 *
 * Corrects the rollover borders and can handle optional {@code Border} types,
 * as specified by the {@code BorderStyle} or {@code HeaderStyle}
 * client properties.
 *
 * @author  Karsten Lentzsch
 * @version $Revision: 1.12 $
 */

public class PlasticToolBarUI extends MetalToolBarUI {

    private static final String PROPERTY_PREFIX = "ToolBar.";

    private PropertyChangeListener listener;

    public static ComponentUI createUI(JComponent b) {
        return new PlasticToolBarUI();
    }

    // Rollover Borders *****************************************************

    @Override
    protected Border createRolloverBorder() {
        return PlasticBorders.getRolloverButtonBorder();
    }

    @Override
    protected void setBorderToRollover(Component c) {
        if (c instanceof AbstractButton) {
            super.setBorderToRollover(c);
        } else if (c instanceof Container) {
            Container cont = (Container) c;
            for (int i = 0; i < cont.getComponentCount(); i++) {
                super.setBorderToRollover(cont.getComponent(i));
            }
        }
    }

    // Handling Special Borders *********************************************

    /**
     * Installs a special border, if indicated by the {@code HeaderStyle}.
     */
    @Override
    protected void installDefaults() {
        super.installDefaults();
        installSpecialBorder();
    }

    @Override
    protected void installListeners() {
        super.installListeners();
        listener = createBorderStyleListener();
        toolBar.addPropertyChangeListener(listener);
    }

    @Override
    protected void uninstallListeners() {
        toolBar.removePropertyChangeListener(listener);
        super.uninstallListeners();
    }

    private PropertyChangeListener createBorderStyleListener() {
        return new PropertyChangeListener() {

            public void propertyChange(PropertyChangeEvent e) {
                String prop = e.getPropertyName();
                if (prop.equals(Options.HEADER_STYLE_KEY)
                    || prop.equals(PlasticLookAndFeel.BORDER_STYLE_KEY)) {
                    PlasticToolBarUI.this.installSpecialBorder();
                }
            }

        };
    }

    /**
     * Installs a special border, if either a look-dependent
     * {@code BorderStyle} or a look-independent
     * {@code HeaderStyle} has been specified.
     * A look specific {@code BorderStyle} shadows
     * a {@code HeaderStyle}.<p>
     *
     * Specifying a {@code HeaderStyle} is recommend.
     */
    private void installSpecialBorder() {
        String suffix;
        BorderStyle borderStyle =
            BorderStyle.from(toolBar, PlasticLookAndFeel.BORDER_STYLE_KEY);
        if (borderStyle == BorderStyle.EMPTY) {
            suffix = "emptyBorder";
        } else if (borderStyle == BorderStyle.ETCHED) {
            suffix = "etchedBorder";
        } else if (borderStyle == BorderStyle.SEPARATOR) {
            suffix = "separatorBorder";
        } else {
            HeaderStyle headerStyle = HeaderStyle.from(toolBar);
            if (headerStyle == HeaderStyle.BOTH) {
                suffix = "headerBorder";
            } else if (headerStyle == HeaderStyle.SINGLE && is3D()) {
                suffix = "etchedBorder";
            } else {
                suffix = "border";
            }
        }
        LookAndFeel.installBorder(toolBar, PROPERTY_PREFIX + suffix);
    }

    // 3D Effect ************************************************************

    @Override
    public void update(Graphics g, JComponent c) {
        if (c.isOpaque()) {
            g.setColor(c.getBackground());
            g.fillRect(0, 0, c.getWidth(), c.getHeight());
            if (is3D()) {
                Rectangle bounds =
                    new Rectangle(0, 0, c.getWidth(), c.getHeight());
                boolean isHorizontal =
                    ((JToolBar) c).getOrientation() == SwingConstants.HORIZONTAL;
                PlasticUtils.addLight3DEffekt(g, bounds, isHorizontal);
            }
        }
        paint(g, c);
    }

    /**
     * Checks and answers if we should add a pseudo 3D effect.
     */
    private boolean is3D() {
        if (PlasticUtils.force3D(toolBar)) {
            return true;
        }
        if (PlasticUtils.forceFlat(toolBar)) {
            return false;
        }
        return PlasticUtils.is3D(PROPERTY_PREFIX)
            && (HeaderStyle.from(toolBar) != null)
            && (BorderStyle.from(toolBar, PlasticLookAndFeel.BORDER_STYLE_KEY)
                != BorderStyle.EMPTY);
    }

}