form1.cs

苏金明编写的《用VB.NET和VC#.NET开发交互式CAD系统》一书的源代码

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

namespace GetBounds
{
	/// <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()
		{
			this.components = new System.ComponentModel.Container();
			this.Size = new System.Drawing.Size(300,300);
			this.Text = "Form1";
		}
		#endregion

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

		protected override void OnPaint(PaintEventArgs e)
		{
			Graphics g= e.Graphics;

			GraphicsPath gp1=new GraphicsPath();
			GraphicsPath gp2=new GraphicsPath();
			GraphicsPath gp3=new GraphicsPath();
			GraphicsPath gp4=new GraphicsPath();

			//利用路径的GetBounds函数获取图元的包围矩形，
			//并用矩形绘出包围矩形
			gp1.AddLine(new PointF(10, 10), new PointF(100, 100));
			gp2.AddEllipse(150, 100, 100, 100);
			gp3.AddArc(10, 80, 100, 100, 20, 80);
			string s= "巴蜀秋山形又瘦，岳麓红枫醉几回";
			StringFormat sf = new StringFormat(StringFormatFlags.NoWrap);
			FontFamily f = new FontFamily("隶书");
			gp4.AddString(s, f, 1, 30, new PointF(120, 50), sf);

			RectangleF gb1= gp1.GetBounds();
			RectangleF gb2= gp2.GetBounds();
			RectangleF gb3= gp3.GetBounds();
			RectangleF gb4 = gp4.GetBounds();
			g.DrawPath(Pens.Black, gp1);
			g.DrawRectangle(Pens.Red, gb1.Left, gb1.Top, gb1.Width, gb1.Height);
			g.DrawPath(Pens.Black, gp2);
			g.DrawRectangle(Pens.Red, gb2.Left, gb2.Top, gb2.Width, gb2.Height);
			g.DrawPath(Pens.Black, gp3);
			g.DrawRectangle(Pens.Red, gb3.Left, gb3.Top, gb3.Width, gb3.Height);
			g.DrawPath(Pens.Blue, gp4);
			g.DrawRectangle(Pens.Red, gb4.Left, gb4.Top, gb4.Width, gb4.Height);

			//输出各图元所在路径的特殊点的个数
			Console.WriteLine(gp1.PointCount);
			Console.WriteLine(gp2.PointCount);
			Console.WriteLine(gp3.PointCount);
			Console.WriteLine(gp4.PointCount);

			//获取并输出各图元所在路径的特殊点的坐标
			PointF[]  p1= gp1.PathPoints;
			PointF[]  p2= gp2.PathPoints;
			PointF[] p3= gp3.PathPoints;
			PointF[] p4= gp4.PathPoints;

			Console.WriteLine("p1:{0},{1},{2},{3}", p1[0].X, p1[0].Y, p1[1].X, p1[1].Y);
			Console.WriteLine("p2:{0},{1},{2},{3},{4},{5},{6},{7},{8},{9},{10},{11},{12},{13},{14}," +
						"{15},{16},{17},{18},{19},{20},{21},{22},{23},{24},{25}", 
						p2[0].X, p2[0].Y, p2[1].X, p2[1].Y, p2[2].X, p2[2].Y, p2[3].X, p2[3].Y, 
						p2[4].X, p2[4].Y, p2[5].X, p2[5].Y, p2[6].X, p2[6].Y, p2[7].X, p2[7].Y, 
						p2[8].X, p2[8].Y, p2[9].X, p2[9].Y, p2[10].X, p2[10].Y, p2[11].X, p2[11].Y, 
						p2[12].X, p2[12].Y);
			Console.WriteLine("p3:{0},{1},{2},{3},{4},{5},{6},{7}", 
						p3[0].X, p3[0].Y, p3[1].X, p3[1].Y, p3[2].X, p3[2].Y, 
						p3[3].X, p3[3].Y);
			Console.WriteLine("p4:{0},{1},{2},{3}", p4[0].X, p4[0].Y, p4[1].X, p4[1].Y);
		}
	}
}