/**
 * Copyright (c) 2011, Martin Foster <martin@ethereal-realms.org>
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice, 
 *       this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the Ethereal-Realms.org 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 HOLDER 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 org.lyra.Widgets;

import javax.swing.*;
import java.awt.*;

/**
 * Creates an icon used for the resizing capability of a window.  This makes
 * the window fall in line with the bulk of Windows-Based applications which
 * use this sort of UI element.
 * <p>
 * @author Martin Foster
 * @version 1.0.1, %Revision, 99%, %LastChangedDate, 17/03/11 8:17PM%
 */
public class ResizeIcon implements Icon {

    // RGB values discovered using ZoomIn
    private static final Color THREE_D_EFFECT_COLOR = new Color(255, 255, 255);
    private static final Color SQUARE_COLOR_LEFT = new Color(184, 180, 163);
    private static final Color SQUARE_COLOR_TOP_RIGHT = new Color(184, 180, 161);
    private static final Color SQUARE_COLOR_BOTTOM_RIGHT = new Color(184, 181, 161);

    // Dimensions
    private static final int WIDTH = 12;
    private static final int HEIGHT = 12;

    
    /* (non-Javadoc)
     * @see javax.swing.Icon#getIconHeight()
     */
    public int getIconHeight() {
        return WIDTH;
    }
    // End of getIconHeight Method

    
    /* (non-Javadoc)
     * @see javax.swing.Icon#getIconWidth()
     */
    public int getIconWidth() {
        return HEIGHT;
    }
    // End of getIconWidth
    

    /* (non-Javadoc)
     * @see javax.swing.Icon#paintIcon(java.awt.Component, java.awt.Graphics, int, int)
     */
    public void paintIcon(Component c, Graphics g, int x, int y) {

        // Layout a row and column "grid"
        int firstRow = 0;
        int firstColumn = 0;
        int rowDiff = 4;
        int columnDiff = 4;

        int secondRow = firstRow + rowDiff;
        int secondColumn = firstColumn + columnDiff;
        int thirdRow = secondRow + rowDiff;
        int thirdColumn = secondColumn + columnDiff;


        // Draw the white squares first, so the gray squares will overlap
        draw3dSquare(g, firstColumn+1, thirdRow+1);

        draw3dSquare(g, secondColumn+1, secondRow+1);
        draw3dSquare(g, secondColumn+1, thirdRow+1);

        draw3dSquare(g, thirdColumn+1, firstRow+1);
        draw3dSquare(g, thirdColumn+1, secondRow+1);
        draw3dSquare(g, thirdColumn+1, thirdRow+1);

        // Draw the gray squares overlapping the white background squares
        drawSquare(g, firstColumn, thirdRow);

        drawSquare(g, secondColumn, secondRow);
        drawSquare(g, secondColumn, thirdRow);

        drawSquare(g, thirdColumn, firstRow);
        drawSquare(g, thirdColumn, secondRow);
        drawSquare(g, thirdColumn, thirdRow);

    }
    // End of paintIcon Method
    
    
    /**
     * In order to produce a 3D effect used for the interface element we first
     * start by drawing the white component.  That component is handed by this
     * method.
     * <p>
     * @param g Graphics drawing instance.
     * @param x Coordinate on the X plane.
     * @param y Coordinate on the Y plane.
     */
    private void draw3dSquare(Graphics g, int x, int y){
    	
    	// Cache the old colour
        Color oldColor = g.getColor();
        
        // Set the white colour
        g.setColor(THREE_D_EFFECT_COLOR); 
        
        // Draw the square
        g.fillRect(x,y,2,2); 
        
        // Reset the old colour
        g.setColor(oldColor); 
    }
    // End of draw3dSquare Method


    /**
     * Draws a singular point used with the structure.   Used to complete the
     * three dimensional look the draw3dSquare method has provided a base for.
     * <p>
     * @param g Graphics drawing instance.
     * @param x Coordinate on the X plane.
     * @param y Coordinate on the Y plane.
     */
    private void drawSquare(Graphics g, int x, int y){
        Color oldColor = g.getColor();
        g.setColor(SQUARE_COLOR_LEFT);
        g.drawLine(x,y, x,y+1);
        g.setColor(SQUARE_COLOR_TOP_RIGHT);
        g.drawLine(x+1,y, x+1,y);
        g.setColor(SQUARE_COLOR_BOTTOM_RIGHT);
        g.drawLine(x+1,y+1, x+1,y+1);
        g.setColor(oldColor);
    }
    // End of drawSquare Method

}
