/*
 * [ChaosIcon.java]
 *
 * Summary: Draws icon for the Chaos app.
 *
 * Copyright: (c) 2013-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  1.0 2013-02-16 initial version.
 */
package com.mindprod.connectors;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Polygon;
import java.util.Random;

/**
 * Draws icon for the Chaos app.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2013-02-16 initial version.
 * @since 2013-02-16
 */
class ChaosIcon extends ConnectorPanel
    {
    private static final Color BLUE = new Color( 0x364bfc );

    private static final Color CYAN = new Color( 0x36fcf4 );

    private static final Color GREEN = new Color( 0x3cfc9e );

    private static final Color OUTLINE_COLOR = Color.BLACK;

    /**
     * default transparent background colour for images.
     */
    private static final Color TRANSPARENT = new Color( 0x00ffffff, true );

    private static final Random wheel = new Random();

    /**
     * thickness of the outline
     */
    private final int lineWidth;

    /**
     * overal dimension of entire image
     */
    private final int size;

    /**
     * Draw a quilty of randomly coloured and placed squares
     *
     * @param overallSize in pixels e.g. 32 .. 256
     * @param lineWidth   width in pixels of outlines of small and over all image 2..5
     */
    ChaosIcon( final int overallSize, final int lineWidth )
        {
        super( overallSize, overallSize );
        this.size = overallSize;
        this.lineWidth = lineWidth;
        }

    /**
     * draw random squares at random positions outlined.
     *
     * @param g where to paint
     */
    public void paintComponent( Graphics g )
        {
        super.paintComponent( g );
        final Graphics2D g2d = ( Graphics2D ) g;
        g2d.setColor( TRANSPARENT );
        g2d.fillRect( 0, 0, size - 1, size - 1 );
        for ( int y = 0; y < size; y++ )
            {
            int x = wheel.nextInt( size );
            switch ( wheel.nextInt( 3 ) )
                {
                case 0:
                    g2d.setColor( GREEN );
                    break;
                case 1:
                    g2d.setColor( CYAN );
                    break;
                default:
                    g2d.setColor( BLUE );
                    break;
                }
            g2d.fillRect( 0, y, x, 1 );
            }
        // touch up the frame outline.
        g2d.setColor( Color.BLACK );
        final Polygon outline = new Polygon();
        outline.addPoint( 0, 0 );
        outline.addPoint( size - 1, 0 );
        outline.addPoint( size - 1, size - 1 );
        outline.addPoint( 0, size - 1 );
        g2d.setColor( OUTLINE_COLOR );
        g2d.setStroke( new BasicStroke( lineWidth ) );
        g2d.drawPolygon( outline );
        }
    }