/*

 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package javax.swing.border;

import java.awt.Graphics;

import java.awt.Insets;

import java.awt.Color;

import java.awt.Component;

import java.beans.ConstructorProperties;

/**

 * A class which implements a simple two-line bevel border.

 * <p>

 * <strong>Warning:</strong>

 * Serialized objects of this class will not be compatible with

 * future Swing releases. The current serialization support is

 * appropriate for short term storage or RMI between applications running

 * the same version of Swing.  As of 1.4, support for long term storage

 * of all JavaBeans™

 * has been added to the <code>java.beans</code> package.

 * Please see {@link java.beans.XMLEncoder}.

 *

 * @author David Kloba

 */

@SuppressWarnings("serial") // Same-version serialization only

public class BevelBorder extends AbstractBorder

{

    /** Raised bevel type. */

    public static final int RAISED  = 0;

    /** Lowered bevel type. */

    public static final int LOWERED = 1;

    protected int bevelType;

    protected Color highlightOuter;

    protected Color highlightInner;

    protected Color shadowInner;

    protected Color shadowOuter;

    /**

     * Creates a bevel border with the specified type and whose

     * colors will be derived from the background color of the

     * component passed into the paintBorder method.

     * @param bevelType the type of bevel for the border

     */

    public BevelBorder(int bevelType) {

        this.bevelType = bevelType;

    }

    /**

     * Creates a bevel border with the specified type, highlight and

     * shadow colors.

     * @param bevelType the type of bevel for the border

     * @param highlight the color to use for the bevel highlight

     * @param shadow the color to use for the bevel shadow

     */

    public BevelBorder(int bevelType, Color highlight, Color shadow) {

        this(bevelType, highlight.brighter(), highlight, shadow, shadow.brighter());

    }

    /**

     * Creates a bevel border with the specified type, highlight and

     * shadow colors.

     *

     * @param bevelType the type of bevel for the border

     * @param highlightOuterColor the color to use for the bevel outer highlight

     * @param highlightInnerColor the color to use for the bevel inner highlight

     * @param shadowOuterColor the color to use for the bevel outer shadow

     * @param shadowInnerColor the color to use for the bevel inner shadow

     */

    @ConstructorProperties({"bevelType", "highlightOuterColor", "highlightInnerColor", "shadowOuterColor", "shadowInnerColor"})

    public BevelBorder(int bevelType, Color highlightOuterColor,

                       Color highlightInnerColor, Color shadowOuterColor,

                       Color shadowInnerColor) {

        this(bevelType);

        this.highlightOuter = highlightOuterColor;

        this.highlightInner = highlightInnerColor;

        this.shadowOuter = shadowOuterColor;

        this.shadowInner = shadowInnerColor;

    }

    /**

     * Paints the border for the specified component with the specified

     * position and size.

     * @param c the component for which this border is being painted

     * @param g the paint graphics

     * @param x the x position of the painted border

     * @param y the y position of the painted border

     * @param width the width of the painted border

     * @param height the height of the painted border

     */

    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {

        if (bevelType == RAISED) {

             paintRaisedBevel(c, g, x, y, width, height);

        } else if (bevelType == LOWERED) {

             paintLoweredBevel(c, g, x, y, width, height);

        }

    }

    /**

     * Reinitialize the insets parameter with this Border's current Insets.

     * @param c the component for which this border insets value applies

     * @param insets the object to be reinitialized

     */

    public Insets getBorderInsets(Component c, Insets insets) {

        insets.set(2, 2, 2, 2);

        return insets;

    }

    /**

     * Returns the outer highlight color of the bevel border

     * when rendered on the specified component.  If no highlight

     * color was specified at instantiation, the highlight color

     * is derived from the specified component's background color.

     *

     * @param c the component for which the highlight may be derived

     * @return the outer highlight {@code Color}

     * @since 1.3

     */

    public Color getHighlightOuterColor(Component c)   {

        Color highlight = getHighlightOuterColor();

        return highlight != null? highlight :

                                       c.getBackground().brighter().brighter();

    }

    /**

     * Returns the inner highlight color of the bevel border

     * when rendered on the specified component.  If no highlight

     * color was specified at instantiation, the highlight color

     * is derived from the specified component's background color.

     *

     * @param c the component for which the highlight may be derived

     * @return the inner highlight {@code Color}

     * @since 1.3

     */

    public Color getHighlightInnerColor(Component c)   {

        Color highlight = getHighlightInnerColor();

        return highlight != null? highlight :

                                       c.getBackground().brighter();

    }

    /**

     * Returns the inner shadow color of the bevel border

     * when rendered on the specified component.  If no shadow

     * color was specified at instantiation, the shadow color

     * is derived from the specified component's background color.

     *

     * @param c the component for which the shadow may be derived

     * @return the inner shadow {@code Color}

     * @since 1.3

     */

    public Color getShadowInnerColor(Component c)      {

        Color shadow = getShadowInnerColor();

        return shadow != null? shadow :

                                    c.getBackground().darker();

    }

    /**

     * Returns the outer shadow color of the bevel border

     * when rendered on the specified component.  If no shadow

     * color was specified at instantiation, the shadow color

     * is derived from the specified component's background color.

     *

     * @param c the component for which the shadow may be derived

     * @return the outer shadow {@code Color}

     * @since 1.3

     */

    public Color getShadowOuterColor(Component c)      {

        Color shadow = getShadowOuterColor();

        return shadow != null? shadow :

                                    c.getBackground().darker().darker();

    }

    /**

     * Returns the outer highlight color of the bevel border.

     * Will return null if no highlight color was specified

     * at instantiation.

     *

     * @return the outer highlight {@code Color} or {@code null} if no highlight

     *         color was specified

     * @since 1.3

     */

    public Color getHighlightOuterColor()   {

        return highlightOuter;

    }

    /**

     * Returns the inner highlight color of the bevel border.

     * Will return null if no highlight color was specified

     * at instantiation.

     *

     * @return the inner highlight {@code Color} or {@code null} if no highlight

     *         color was specified

     * @since 1.3

     */

    public Color getHighlightInnerColor()   {

        return highlightInner;

    }

    /**

     * Returns the inner shadow color of the bevel border.

     * Will return null if no shadow color was specified

     * at instantiation.

     *

     * @return the inner shadow {@code Color} or {@code null} if no shadow color

     *         was specified

     * @since 1.3

     */

    public Color getShadowInnerColor()      {

        return shadowInner;

    }

    /**

     * Returns the outer shadow color of the bevel border.

     * Will return null if no shadow color was specified

     * at instantiation.

     *

     * @return the outer shadow {@code Color} or {@code null} if no shadow color

     *         was specified

     * @since 1.3

     */

    public Color getShadowOuterColor()      {

        return shadowOuter;

    }

    /**

     * Returns the type of the bevel border.

     *

     * @return the bevel border type, either {@code RAISED} or {@code LOWERED}

     */

    public int getBevelType()       {

        return bevelType;

    }

    /**

     * Returns whether or not the border is opaque. This implementation

     * returns {@code true}.

     *

     * @return true

     */

    public boolean isBorderOpaque() { return true; }

    protected void paintRaisedBevel(Component c, Graphics g, int x, int y,

                                    int width, int height)  {

        Color oldColor = g.getColor();

        int h = height;

        int w = width;

        g.translate(x, y);

        g.setColor(getHighlightOuterColor(c));

        g.drawLine(0, 0, 0, h-2);

        g.drawLine(1, 0, w-2, 0);

        g.setColor(getHighlightInnerColor(c));

        g.drawLine(1, 1, 1, h-3);

        g.drawLine(2, 1, w-3, 1);

        g.setColor(getShadowOuterColor(c));

        g.drawLine(0, h-1, w-1, h-1);

        g.drawLine(w-1, 0, w-1, h-2);

        g.setColor(getShadowInnerColor(c));

        g.drawLine(1, h-2, w-2, h-2);

        g.drawLine(w-2, 1, w-2, h-3);

        g.translate(-x, -y);

        g.setColor(oldColor);

    }

    protected void paintLoweredBevel(Component c, Graphics g, int x, int y,

                                        int width, int height)  {

        Color oldColor = g.getColor();

        int h = height;

        int w = width;

        g.translate(x, y);

        g.setColor(getShadowInnerColor(c));

        g.drawLine(0, 0, 0, h-1);

        g.drawLine(1, 0, w-1, 0);

        g.setColor(getShadowOuterColor(c));

        g.drawLine(1, 1, 1, h-2);

        g.drawLine(2, 1, w-2, 1);

        g.setColor(getHighlightOuterColor(c));

        g.drawLine(1, h-1, w-1, h-1);

        g.drawLine(w-1, 1, w-1, h-2);

        g.setColor(getHighlightInnerColor(c));

        g.drawLine(2, h-2, w-2, h-2);

        g.drawLine(w-2, 2, w-2, h-3);

        g.translate(-x, -y);

        g.setColor(oldColor);

    }

}