form1.cs

这是《C#图形程序设计》这本书的源代码

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

namespace 直线段图案设计
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.MainMenu mainMenu1;
		private System.Windows.Forms.MenuItem menuItem1;
		private System.Windows.Forms.MenuItem menuItem2;
		private System.Windows.Forms.MenuItem menuItem3;
		private System.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.MenuItem menuItem5;
		private System.Windows.Forms.MenuItem menuItem6;
		private System.Windows.Forms.MenuItem menuItem7;
		private System.Windows.Forms.MenuItem menuItem8;
		private System.Windows.Forms.MenuItem menuItem9;
		private System.Windows.Forms.MenuItem menuItem10;
		private System.Windows.Forms.MenuItem menuItem11;
		private System.Windows.Forms.MenuItem menuItem12;
		private System.Windows.Forms.MenuItem menuItem13;
		private System.Windows.Forms.MenuItem menuItem14;
		private System.Windows.Forms.MenuItem menuItem15;
		private System.Windows.Forms.MenuItem menuItem16;
		private System.Windows.Forms.MenuItem menuItem17;
		private System.Windows.Forms.MenuItem menuItem18;
		private System.Windows.Forms.MenuItem menuItem19;
		private System.Windows.Forms.MenuItem menuItem20;
		private System.Windows.Forms.MenuItem menuItem21;
		private System.Windows.Forms.MenuItem menuItem22;
		private System.Windows.Forms.MenuItem menuItem23;
		private System.Windows.Forms.MenuItem menuItem24;
		private System.Windows.Forms.MenuItem menuItem25;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

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

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.menuItem5 = new System.Windows.Forms.MenuItem();
			this.menuItem6 = new System.Windows.Forms.MenuItem();
			this.menuItem8 = new System.Windows.Forms.MenuItem();
			this.menuItem9 = new System.Windows.Forms.MenuItem();
			this.menuItem10 = new System.Windows.Forms.MenuItem();
			this.menuItem11 = new System.Windows.Forms.MenuItem();
			this.menuItem12 = new System.Windows.Forms.MenuItem();
			this.menuItem13 = new System.Windows.Forms.MenuItem();
			this.menuItem14 = new System.Windows.Forms.MenuItem();
			this.menuItem15 = new System.Windows.Forms.MenuItem();
			this.menuItem16 = new System.Windows.Forms.MenuItem();
			this.menuItem17 = new System.Windows.Forms.MenuItem();
			this.menuItem7 = new System.Windows.Forms.MenuItem();
			this.menuItem18 = new System.Windows.Forms.MenuItem();
			this.menuItem19 = new System.Windows.Forms.MenuItem();
			this.menuItem20 = new System.Windows.Forms.MenuItem();
			this.menuItem21 = new System.Windows.Forms.MenuItem();
			this.menuItem22 = new System.Windows.Forms.MenuItem();
			this.menuItem23 = new System.Windows.Forms.MenuItem();
			this.menuItem24 = new System.Windows.Forms.MenuItem();
			this.menuItem25 = new System.Windows.Forms.MenuItem();
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1,
																					  this.menuItem6,
																					  this.menuItem7});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem2,
																					  this.menuItem3,
																					  this.menuItem4,
																					  this.menuItem5});
			this.menuItem1.Text = "直线段图案";
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 0;
			this.menuItem2.Text = "直线图案1";
			this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 1;
			this.menuItem3.Text = "直线图案2";
			this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 2;
			this.menuItem4.Text = "直线图案3";
			this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
			// 
			// menuItem5
			// 
			this.menuItem5.Index = 3;
			this.menuItem5.Text = "圆盘直线图案";
			this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
			// 
			// menuItem6
			// 
			this.menuItem6.Index = 1;
			this.menuItem6.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem8,
																					  this.menuItem9,
																					  this.menuItem10,
																					  this.menuItem11,
																					  this.menuItem12,
																					  this.menuItem13,
																					  this.menuItem14,
																					  this.menuItem15,
																					  this.menuItem16,
																					  this.menuItem17,
																					  this.menuItem18,
																					  this.menuItem19,
																					  this.menuItem20});
			this.menuItem6.Text = "按三角函数规律分布的直线段图案";
			// 
			// menuItem8
			// 
			this.menuItem8.Index = 0;
			this.menuItem8.Text = "直线线段的位置和长短均按三角函数规律分布的图案1";
			this.menuItem8.Click += new System.EventHandler(this.menuItem8_Click);
			// 
			// menuItem9
			// 
			this.menuItem9.Index = 1;
			this.menuItem9.Text = "直线线段的位置和长短均按三角函数规律分布的图案2";
			this.menuItem9.Click += new System.EventHandler(this.menuItem9_Click);
			// 
			// menuItem10
			// 
			this.menuItem10.Index = 2;
			this.menuItem10.Text = "直线线段的位置和长短均按三角函数规律分布的图案3";
			this.menuItem10.Click += new System.EventHandler(this.menuItem10_Click);
			// 
			// menuItem11
			// 
			this.menuItem11.Index = 3;
			this.menuItem11.Text = "直线线段的位置和长短均按三角函数规律分布的图案4";
			this.menuItem11.Click += new System.EventHandler(this.menuItem11_Click);
			// 
			// menuItem12
			// 
			this.menuItem12.Index = 4;
			this.menuItem12.Text = "4瓣花形图案";
			this.menuItem12.Click += new System.EventHandler(this.menuItem12_Click);
			// 
			// menuItem13
			// 
			this.menuItem13.Index = 5;
			this.menuItem13.Text = "变形4瓣花图案1";
			this.menuItem13.Click += new System.EventHandler(this.menuItem13_Click);
			// 
			// menuItem14
			// 
			this.menuItem14.Index = 6;
			this.menuItem14.Text = "变形4瓣花图案2";
			this.menuItem14.Click += new System.EventHandler(this.menuItem14_Click);
			// 
			// menuItem15
			// 
			this.menuItem15.Index = 7;
			this.menuItem15.Text = "变形4瓣花图案3";
			this.menuItem15.Click += new System.EventHandler(this.menuItem15_Click);
			// 
			// menuItem16
			// 
			this.menuItem16.Index = 8;
			this.menuItem16.Text = "线段端点按三角函数规律变化的图案";
			this.menuItem16.Click += new System.EventHandler(this.menuItem16_Click);
			// 
			// menuItem17
			// 
			this.menuItem17.Index = 9;
			this.menuItem17.Text = "摩尔图案1";
			this.menuItem17.Click += new System.EventHandler(this.menuItem17_Click);
			// 
			// menuItem7
			// 
			this.menuItem7.Index = 2;
			this.menuItem7.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem21,
																					  this.menuItem22,
																					  this.menuItem23,
																					  this.menuItem24,
																					  this.menuItem25});
			this.menuItem7.Text = "按函数规律分布的直线段图案";
			// 
			// menuItem18
			// 
			this.menuItem18.Index = 10;
			this.menuItem18.Text = "摩尔图案2";
			this.menuItem18.Click += new System.EventHandler(this.menuItem18_Click);
			// 
			// menuItem19
			// 
			this.menuItem19.Index = 11;
			this.menuItem19.Text = "长瓣花形图案";
			this.menuItem19.Click += new System.EventHandler(this.menuItem19_Click);
			// 
			// menuItem20
			// 
			this.menuItem20.Index = 12;
			this.menuItem20.Text = "6瓣花图案";
			this.menuItem20.Click += new System.EventHandler(this.menuItem20_Click);
			// 
			// menuItem21
			// 
			this.menuItem21.Index = 0;
			this.menuItem21.Text = "按对数分布的直线段";
			this.menuItem21.Click += new System.EventHandler(this.menuItem21_Click);
			// 
			// menuItem22
			// 
			this.menuItem22.Index = 1;
			this.menuItem22.Text = "市松图案";
			this.menuItem22.Click += new System.EventHandler(this.menuItem22_Click);
			// 
			// menuItem23
			// 
			this.menuItem23.Index = 2;
			this.menuItem23.Text = "仿金刚石图案";
			this.menuItem23.Click += new System.EventHandler(this.menuItem23_Click);
			// 
			// menuItem24
			// 
			this.menuItem24.Index = 3;
			this.menuItem24.Text = "按2阶函数规律分布的图案1";
			this.menuItem24.Click += new System.EventHandler(this.menuItem24_Click);
			// 
			// menuItem25
			// 
			this.menuItem25.Index = 4;
			this.menuItem25.Text = "按2阶函数规律分布的图案2";
			this.menuItem25.Click += new System.EventHandler(this.menuItem25_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(480, 337);
			this.Menu = this.mainMenu1;
			this.Name = "Form1";
			this.Text = "Form1";

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void menuItem2_Click(object sender, System.EventArgs e)
		{
			Graphics g=this.CreateGraphics();
			Pen pen=new Pen(Color.Red,1);
			g.Clear(this.BackColor);
			
			float i;
			for(i=4;i<=280;i+=4)
			{
				g.DrawLine(pen,4,95,i,4);
				g.DrawLine(pen,4,95,i,190);
				g.DrawLine(pen,280,95,280-i,190);
				g.DrawLine(pen,280,95,280-i,4);
			}
		}

		private void menuItem3_Click(object sender, System.EventArgs e)
		{
			Graphics g=this.CreateGraphics();
			Pen pen=new Pen(Color.Red,1);
			g.Clear(this.BackColor);
			float i,j;
			int x1,x2,x3,y1,y2,y3,x4,y4;
			for(i=0;i<=6.28f;i+=6.28f/8.0f)
			{
				x1=(int)(45*Math.Cos(i));
				y1=(int)(45*Math.Sin(i));
				x2=(int)(30*Math.Cos(i));
				y2=(int)(30*Math.Sin(i));
				for(j=0;j<=6.3f;j+=0.1f)
				{
					x3=(int)(45*Math.Cos(j));
					y3=(int)(45*Math.Sin(j));
					x4=(int)(30*Math.Cos(j));
					y4=(int)(30*Math.Sin(j));
					x3=180+x1+x3;y3=130+y1+y3;
					x4=180+x2+x4;y4=130+y2+y4;
					g.DrawLine(pen,x3,y3,x4,y4);
				}
			}
		}

		private void menuItem4_Click(object sender, System.EventArgs e)
		{
			Graphics g=this.CreateGraphics();
			Pen pen=new Pen(Color.Red,1);
			g.Clear(this.BackColor);
			int a=40;
			int b=4;
			int x,y;
			int i;
			x=y=a;
			for(i=0;i<11;i++)
			{
				g.DrawLine(pen,320,40-y/2,320-x,40);
				g.DrawLine(pen,320-x,40,320,40+y/2);
				g.DrawLine(pen,320,40+y/2,320+x,40);
				g.DrawLine(pen,320+x,40,320,40-y/2);
				x+=b;
				y-=b;
			}
			x=y=a;
			for(i=0;i<11;i++)
			{
				g.DrawLine(pen,320,40-y/2,320-x,40);
				g.DrawLine(pen,320-x,40,320,40+y/2);
				g.DrawLine(pen,320,40+y/2,320+x,40);
				g.DrawLine(pen,320+x,40,320,40-y/2);
				x-=b;
				y+=b;
			}
		}

		private void menuItem5_Click(object sender, System.EventArgs e)
		{
			Graphics g=this.CreateGraphics();
			Pen pen=new Pen(Color.Red,1);
			g.Clear(this.BackColor);
			const double pi=3.14159;
			int x1,x2,y1,y2;
			double a,d;
			for(a=0;a<=2*pi;a+=pi/90)
			{
				d=60+90*Math.Sin(8*a);
				x1=(int)(300*Math.Cos(a));
				y1=(int)(90*Math.Sin(a));
				x2=(int)(d*Math.Cos(a));
				y2=(int)(60*Math.Sin(a));
				x1=x1+420;
				x2=x2+420;
				y1=-y1+160;
				y2=-y2+160;
				g.DrawLine(pen,x1/2,y1,x2/2,y2);
			}
		}

		private void menuItem8_Click(object sender, System.EventArgs e)
		{
			//编程思想：
			//直线线段的位置和长短均按三角函数规律分布的图案
			Graphics g=this.CreateGraphics();
			Pen pen=new Pen(Color.Red,1);
			g.Clear(this.BackColor);
			int px,py;
			const double pi=3.1416;
			double a,x1,x2,y1,y2;
			for(a=0;a<=pi;a+=pi/380)
			{
				px=320;py=240;
				x1=280*Math.Cos(1.6*a)+px;
				y1=379-((90*Math.Sin(8*a))*Math.Cos(a)+py);
				x2=280*Math.Cos(1.8*a)+px;
				y2=y1;
				g.DrawLine(pen,(int)x1,(int)y1,(int)x2,(int)y2);
			}
			//说明：
			//变化本例程序段
			//x1=280*Math.Cos(1.6*a)+px;
			//y1=379-((90*Math.Sin(8*a))*Math.Cos(a)+py);
			//x2=280*Math.Cos(1.8*a)+px;
			//y2=y1;
			//中的sin()、cos()函数的值，则得到不同的图案