using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace PS6_Q1
{
	//
	// Problem Set 6, Question 1
	// Written by Paul Hudak
	// October 27, 2006
	//
	public class Form1 : System.Windows.Forms.Form
	{
		//
		// Paints a checkerboard pattern on a Form.
		//
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			// Required for Windows Form Designer support
			InitializeComponent();

			Size = new Size(500,500);	// set form size
			Text = "Checkerboard";		//   and form label
			BackColor = Color.Black;	// might look better with a black background
		}

		protected override void OnPaint(PaintEventArgs e)
		{
			// size of individual squares, in pixels
			int size = 50;
			// get handle on graphics window
			Graphics g = e.Graphics;
			// use nested loops to create 8x8 checkerboard
			for (int i=0; i<8; i=i+1)
				for (int j=0; j<8; j=j+1)
				{	/* this is the obvious solution
					if ((i+j)%2==0)	// determines which color to use
						g.FillRectangle(Brushes.Red,50+i*size,50+j*size,size,size);
					else 
						g.FillRectangle(Brushes.Yellow,50+i*size,50+j*size,size,size);
					*/
					// this solution uses a conditional expression
					g.FillRectangle((i+j)%2==0 ? Brushes.Red : Brushes.Yellow,
									50+i*size,50+j*size,size,size);
				}
		}

		// Clean up any resources being used.
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.Size = new System.Drawing.Size(300,300);
			this.Text = "Form1";
		}
		#endregion

		// The main entry point for the application.
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
	}
}