/*
 * Copyright (c) 1997, 2015, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package javax.swing.border;

import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Component;
import java.awt.Color;

import javax.swing.Icon;

A class which provides a matte-like border of either a solid color
or a tiled icon.

Warning:
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 java.beans package. Please see XMLEncoder. 
Author:
Amy Fowler/**
 * A class which provides a matte-like border of either a solid color
 * or a tiled icon.
 * <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&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Amy Fowler
 */
@SuppressWarnings("serial")
public class MatteBorder extends EmptyBorder
{
    
The color rendered for the border.
/**
     * The color rendered for the border.
     */
    protected Color color;
    
The icon to be used for tiling the border.
/**
     * The icon to be used for tiling the border.
     */
    protected Icon tileIcon;

    
Creates a matte border with the specified insets and color.
Params:
top – the top inset of the border
left – the left inset of the border
bottom – the bottom inset of the border
right – the right inset of the border
matteColor – the color rendered for the border/**
     * Creates a matte border with the specified insets and color.
     * @param top the top inset of the border
     * @param left the left inset of the border
     * @param bottom the bottom inset of the border
     * @param right the right inset of the border
     * @param matteColor the color rendered for the border
     */
    public MatteBorder(int top, int left, int bottom, int right, Color matteColor)   {
        super(top, left, bottom, right);
        this.color = matteColor;
    }

    
Creates a matte border with the specified insets and color.
Params:
borderInsets – the insets of the border
matteColor – the color rendered for the border
Since:
1.3/**
     * Creates a matte border with the specified insets and color.
     * @param borderInsets the insets of the border
     * @param matteColor the color rendered for the border
     * @since 1.3
     */
    public MatteBorder(Insets borderInsets, Color matteColor)   {
        super(borderInsets);
        this.color = matteColor;
    }

    
Creates a matte border with the specified insets and tile icon.
Params:
top – the top inset of the border
left – the left inset of the border
bottom – the bottom inset of the border
right – the right inset of the border
tileIcon – the icon to be used for tiling the border/**
     * Creates a matte border with the specified insets and tile icon.
     * @param top the top inset of the border
     * @param left the left inset of the border
     * @param bottom the bottom inset of the border
     * @param right the right inset of the border
     * @param tileIcon the icon to be used for tiling the border
     */
    public MatteBorder(int top, int left, int bottom, int right, Icon tileIcon)   {
        super(top, left, bottom, right);
        this.tileIcon = tileIcon;
    }

    
Creates a matte border with the specified insets and tile icon.
Params:
borderInsets – the insets of the border
tileIcon – the icon to be used for tiling the border
Since:
1.3/**
     * Creates a matte border with the specified insets and tile icon.
     * @param borderInsets the insets of the border
     * @param tileIcon the icon to be used for tiling the border
     * @since 1.3
     */
    public MatteBorder(Insets borderInsets, Icon tileIcon)   {
        super(borderInsets);
        this.tileIcon = tileIcon;
    }

    
Creates a matte border with the specified tile icon.  The
insets will be calculated dynamically based on the size of
the tile icon, where the top and bottom will be equal to the
tile icon's height, and the left and right will be equal to
the tile icon's width.
Params:
tileIcon – the icon to be used for tiling the border/**
     * Creates a matte border with the specified tile icon.  The
     * insets will be calculated dynamically based on the size of
     * the tile icon, where the top and bottom will be equal to the
     * tile icon's height, and the left and right will be equal to
     * the tile icon's width.
     * @param tileIcon the icon to be used for tiling the border
     */
    public MatteBorder(Icon tileIcon)   {
        this(-1,-1,-1,-1, tileIcon);
    }

    
Paints the matte border.
/**
     * Paints the matte border.
     */
    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        Insets insets = getBorderInsets(c);
        Color oldColor = g.getColor();
        g.translate(x, y);

        // If the tileIcon failed loading, paint as gray.
        if (tileIcon != null) {
            color = (tileIcon.getIconWidth() == -1) ? Color.gray : null;
        }

        if (color != null) {
            g.setColor(color);
            g.fillRect(0, 0, width - insets.right, insets.top);
            g.fillRect(0, insets.top, insets.left, height - insets.top);
            g.fillRect(insets.left, height - insets.bottom, width - insets.left, insets.bottom);
            g.fillRect(width - insets.right, 0, insets.right, height - insets.bottom);

        } else if (tileIcon != null) {
            int tileW = tileIcon.getIconWidth();
            int tileH = tileIcon.getIconHeight();
            paintEdge(c, g, 0, 0, width - insets.right, insets.top, tileW, tileH);
            paintEdge(c, g, 0, insets.top, insets.left, height - insets.top, tileW, tileH);
            paintEdge(c, g, insets.left, height - insets.bottom, width - insets.left, insets.bottom, tileW, tileH);
            paintEdge(c, g, width - insets.right, 0, insets.right, height - insets.bottom, tileW, tileH);
        }
        g.translate(-x, -y);
        g.setColor(oldColor);

    }

    private void paintEdge(Component c, Graphics g, int x, int y, int width, int height, int tileW, int tileH) {
        g = g.create(x, y, width, height);
        int sY = -(y % tileH);
        for (x = -(x % tileW); x < width; x += tileW) {
            for (y = sY; y < height; y += tileH) {
                this.tileIcon.paintIcon(c, g, x, y);
            }
        }
        g.dispose();
    }

    
Reinitialize the insets parameter with this Border's current Insets.
Params:
c – the component for which this border insets value applies
insets – the object to be reinitialized
Since:
1.3/**
     * 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
     * @since 1.3
     */
    public Insets getBorderInsets(Component c, Insets insets) {
        return computeInsets(insets);
    }

    
Returns the insets of the border.
Since:
1.3/**
     * Returns the insets of the border.
     * @since 1.3
     */
    public Insets getBorderInsets() {
        return computeInsets(new Insets(0,0,0,0));
    }

    /* should be protected once api changes area allowed */
    private Insets computeInsets(Insets insets) {
        if (tileIcon != null && top == -1 && bottom == -1 &&
            left == -1 && right == -1) {
            int w = tileIcon.getIconWidth();
            int h = tileIcon.getIconHeight();
            insets.top = h;
            insets.right = w;
            insets.bottom = h;
            insets.left = w;
        } else {
            insets.left = left;
            insets.top = top;
            insets.right = right;
            insets.bottom = bottom;
        }
        return insets;
    }

    
Returns the color used for tiling the border or null
if a tile icon is being used.
Returns:
the Color object used to render the border or null if a tile icon is used
Since:
1.3/**
     * Returns the color used for tiling the border or null
     * if a tile icon is being used.
     *
     * @return the {@code Color} object used to render the border or {@code null}
     *         if a tile icon is used
     * @since 1.3
     */
    public Color getMatteColor() {
        return color;
    }

   
Returns the icon used for tiling the border or null
if a solid color is being used.
Returns:
the Icon used to tile the border or null if a solid color is used to fill the border
Since:
1.3/**
     * Returns the icon used for tiling the border or null
     * if a solid color is being used.
     *
     * @return the {@code Icon} used to tile the border or {@code null} if a
     *         solid color is used to fill the border
     * @since 1.3
     */
    public Icon getTileIcon() {
        return tileIcon;
    }

    
Returns whether or not the border is opaque.
Returns:
true if the border is opaque, false otherwise/**
     * Returns whether or not the border is opaque.
     *
     * @return {@code true} if the border is opaque, {@code false} otherwise
     */
    public boolean isBorderOpaque() {
        // If a tileIcon is set, then it may contain transparent bits
        return color != null;
    }

}