Hit Testing


   

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/

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

using System.Drawing.Drawing2D;

namespace HitTesting
{
    /// <summary>
    /// Summary description for HitTesting.
    /// </summary>
    public class HitTesting : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;
        private System.Windows.Forms.Label label1;
        
        GraphicsPath gP;
        string mes = "Move to the big I!";
        FontFamily fF = new FontFamily("Times new roman");

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

            CreateFont();
            this.Text = "Hit Testing";
            this.label1.Font = new Font(fF, 12);
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        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.label1 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(88, 16);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(160, 23);
            this.label1.TabIndex = 0;
            this.label1.Text = "label1";
            // 
            // HitTesting
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 109);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.label1});
            this.Name = "HitTesting";
            this.Text = "HitTesting";
            this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.HitTesting_MouseMove);
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new HitTesting());
        }
        void CreateFont()
        {
            Graphics g = this.CreateGraphics();
            label1.Text = mes;
            string s = "I";
            int fSt = (int)FontStyle.Regular;
            Point xy = new Point(50, 10);
            StringFormat sFr = StringFormat.GenericDefault;
 
            gP = new GraphicsPath();  // gp is a class member
            gP.AddString(s, fF, fSt, 50, xy, sFr);  // add the string to the path
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = this.CreateGraphics();
            g.DrawPath(Pens.Black, gP);  // draw the path to the surface
            g.Dispose();
        }

        private void HitTesting_MouseMove(object sender, MouseEventArgs e)
        {
            Region reg = new Region(gP);
            if(reg.IsVisible(new Point(e.X, e.Y)))
                mes = "You touched me ...";
            else 
                mes = "Move to the big I!";
            CreateFont();
        }
    }
}

           
          


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