form1.cs

C#150例

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;  

namespace Example060_图形容器的应用
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <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 Form Designer generated code
		/// <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()
		{
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

		}
		#endregion

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

		private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			// Draw an ellipse centered at (100, 100).
			Graphics myGraphics=e.Graphics; 
			Pen myBlackPen=new Pen(Color.Black);
			myGraphics.TranslateTransform(100, 100);
			myGraphics.DrawEllipse(myBlackPen, -40, -60, 80, 120);

			// Draw the eye at the center of the ellipse.
			DrawEye(myGraphics);

			// Draw an ellipse centered at 200, 100.
			myGraphics.TranslateTransform(100, 0, MatrixOrder.Append);
			myGraphics.DrawEllipse(myBlackPen, -40, -60, 80, 120);

			// Rotate the eye 40 degrees, and draw it 30 units above
			// the center of the ellipse.
			GraphicsContainer myGraphicsContainer = myGraphics.BeginContainer();
			myGraphics.RotateTransform(-40);
			myGraphics.TranslateTransform(0, -30, MatrixOrder.Append);
			DrawEye(myGraphics);
			myGraphics.EndContainer(myGraphicsContainer);

			// Draw an ellipse centered at (300, 100).
			myGraphics.TranslateTransform(100, 0, MatrixOrder.Append);
			myGraphics.DrawEllipse(myBlackPen, -40, -60, 80, 120);

			// Stretch and rotate the eye, and draw it at the 
			// center of the ellipse.
			myGraphicsContainer = myGraphics.BeginContainer();
			myGraphics.ScaleTransform(2, 1.5f);
			myGraphics.RotateTransform(45, MatrixOrder.Append);
			DrawEye(myGraphics);
			myGraphics.EndContainer(myGraphicsContainer);
		}
		private void DrawEye(Graphics myGraphics)
		{
			GraphicsContainer eyeContainer;

			eyeContainer = myGraphics.BeginContainer();

			Pen myBlackPen = new Pen(Color.Black);
			SolidBrush myGreenBrush = new SolidBrush(Color.Green);
			SolidBrush myBlackBrush = new SolidBrush(Color.Black);

			GraphicsPath myTopPath = new GraphicsPath();
			myTopPath.AddEllipse(-30, -50, 60, 60);

			GraphicsPath myBottomPath = new GraphicsPath();
			myBottomPath.AddEllipse(-30, -10, 60, 60);

			Region myTopRegion = new Region(myTopPath);
			Region myBottomRegion = new Region(myBottomPath);

			// Draw the outline of the eye.
			// The outline of the eye consists of two ellipses.
			// The top ellipse is clipped by the bottom ellipse, and
			// the bottom ellipse is clipped by the top ellipse.
			myGraphics.Clip = myTopRegion;
			myGraphics.DrawPath(myBlackPen, myBottomPath);
			myGraphics.Clip = myBottomRegion;
			myGraphics.DrawPath(myBlackPen, myTopPath);

			// Fill the iris.
			// The iris is clipped by the bottom ellipse.
			myGraphics.FillEllipse(myGreenBrush, -10, -15, 20, 22);

			// Fill the pupil.
			myGraphics.FillEllipse(myBlackBrush, -3, -7, 6, 9);

			myGraphics.EndContainer(eyeContainer);
		}	
	}
}