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

namespace Triangle
{
	/// <summary>
	/// 一家日企的面試題目之二：
	/// 設(shè)計一個程序，當主窗口顯示時，從窗口客戶區(qū)的左上角向右上角緩慢下落一
	/// 個小三角形，在下落過程中，小三角形做逆時針緩慢旋轉(zhuǎn)，到達右下角時，正
	/// 好以一條底邊和客戶區(qū)邊框重合并停止。在改變窗口大小時，停止三角形的下
	/// 落，重新從左上角開始下落。
	/// 要求：在整個屏幕上只能有一個三角形在移動。
	/// </summary>
	public class TriangleForm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Timer timer1;
		private System.ComponentModel.IContainer components;
		private TriangleDrawer triDrawer;

		public TriangleForm()
		{
			//
			// Windows 窗體設(shè)計器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 調(diào)用后添加任何構(gòu)造函數(shù)代碼
			//
			this.triDrawer = new TriangleDrawer(this);
		}

		/// <summary>
		/// 清理所有正在使用的資源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗體設(shè)計器生成的代碼
		/// <summary>
		/// 設(shè)計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內(nèi)容。
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			this.timer1 = new System.Windows.Forms.Timer(this.components);
			// 
			// TriangleForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.Color.White;
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Name = "TriangleForm";
			this.Text = "下落的三角形";
			this.Resize += new System.EventHandler(this.TriangleForm_Resize);
			this.Load += new System.EventHandler(this.TriangleForm_Load);
			this.Closed += new System.EventHandler(this.TriangleForm_Closed);
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.TriangleForm_Paint);

		}
		#endregion

		/// <summary>
		/// 應(yīng)用程序的主入口點。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new TriangleForm());
		}

		private void TriangleForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			this.triDrawer.DrawCurrentTriangle();
		}

		private void TriangleForm_Resize(object sender, System.EventArgs e)
		{
			this.triDrawer.Draw();
		}

		private void TriangleForm_Load(object sender, System.EventArgs e)
		{
			this.triDrawer.Draw();
		}

		private void TriangleForm_Closed(object sender, System.EventArgs e)
		{
			this.triDrawer.Stop();
		}
	}
}