2015-07-11 15:24:04
  1 using System;
 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Text;

 using System.Windows.Forms;

 namespace 窗口停靠

 {

     public partial class Form1 : Form

     {

         string location = null;

         int y;

         int x;

         public Form1()

         {

             InitializeComponent();

         }

         /// <summary>

         /// 当窗体的位置改变时发生

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e"></param>

         private void Form1_LocationChanged(object sender, EventArgs e)

         {

             y = this.Location.Y;

             x = this.Location.X;

             if (this.Top <= )

             {

                 location = "top";

             }

             else if (this.Left <= )

             {

                 location = "left";

             }

             else if (this.Right >= Screen.PrimaryScreen.Bounds.Width)

             {

                 location = "right";

             }

             else

             {

                 location = "center";

             }

         }

         private void timer2_Tick(object sender, EventArgs e)

         {

             //如果鼠标在窗体上，则根据停靠位置显示整个窗体

             if (this.Bounds.Contains(Cursor.Position))

             {

                 switch (location)

                 {

                     case "top":

                         if(this.Location.Y<)

                         {

                             y += ;

                             if(y>)

                             {

                                 y = ;

                             }

                             this.Location = new Point(this.Location.X, y);

                         }

                         break;

                     case "left":

                          if(this.Location.X<)

                         {

                             x += ;

                             if(x>)

                             {

                                 x = ;

                             }

                             this.Location = new Point(x, this.Location.Y);

                         }

                         break;

                     case "right":

                         if (this.Location.X > Screen.PrimaryScreen.Bounds.Width - this.Width)

                         {

                             x -= ;

                             if (x < Screen.PrimaryScreen.Bounds.Width - this.Width)

                             {

                                 x = Screen.PrimaryScreen.Bounds.Width - this.Width;

                             }

                             this.Location = new Point(x, this.Location.Y);

                         }

                         break;

                 }

             }

             else  //如果鼠标离开窗体，则根据停靠位置隐藏窗体，但须留出部分窗体边缘以便鼠标选中窗体

             {

                 switch (location)

                 {

                     case "top":

                         y = y - ;

                         if(y>-this.Height+)

                         {

                         this.Location = new Point(this.Location.X, y);

                         }

                         else

                         {

                             this.Location = new Point(this.Location.X, -this.Height + );

                         }

                         break;

                     case "left":

                         x -= ;

                         if(x>-this.Width+)

                         {

                         this.Location = new Point(x, this.Location.Y);

                         }

                         else

                         {

                             this.Location = new Point(-this.Width + , this.Location.Y);

                         }

                         break;

                     case "right":

                         if(x<Screen.PrimaryScreen.Bounds.Width- )

                         {

                             x += ;

                         this.Location = new Point(x, this.Location.Y);

                         }

                         else

                         {

                             this.Location = new Point(Screen.PrimaryScreen.Bounds.Width + - , this.Location.Y);

                         }

                         break;

                 }

             }

         }

     }

 }