鼠标 知多少?

鼠标重要性不必多说, 我们这些"小毛孩"可能不敢想象没有鼠标时的计算机是如何操作的, 我承认鼠标不是不可替代, 但也已不可或缺.

大多鼠标编程都与 API 函数有着某种关系, 毕竟鼠标的操作已进入了非纯软件领域. 因此, 要对鼠标下刀, 就得熟悉相关的 API 函数, 这点无可厚非.

今天我们就对鼠标编程进行一个大杂汇. 工作中能否用到, 不太清楚..... 

下面就分四个部分讲述我们与鼠标的不解之缘.

 

一. 应用篇:

1. 利用鼠标绘图

很多很多书籍, 很多很多网页都在讲述这个东东, 为了不找骂, 这里直接附代码! 

实现: 利用窗体的 MouseDown, MouseMove, MouseUp事件及Pen, Graphics等类实现.

代码: 

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

namespace ziyiMouse1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            pen = new Pen(Color.FromName("black"));//始末画笔
            graphics = CreateGraphics();//初始画板
        }

        public bool G_OnMouseDown = false;//控制画图
        public Point lastPoint = Point.Empty;
        public Pen pen;
        public Graphics graphics;

        //将上一个点的LastPoint的值设为目前点的currPoint值.
        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (lastPoint.Equals(Point.Empty))
            { lastPoint = new Point(e.X, e.Y); }
            if (G_OnMouseDown)
            {
                Point cruuPoint = new Point(e.X, e.Y);
                graphics.DrawLine(pen, cruuPoint, lastPoint);
            }
            lastPoint = new Point(e.X, e.Y);
        }

        //当鼠标离开时把控制画图设为false;
        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            G_OnMouseDown = false;
        }

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            G_OnMouseDown = true;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

    }
}

效果:

 

 

2. 限制鼠标只在某一区域内工作

去过网吧的小朋友都知道, 开机后一段时间内鼠标只能在一个很小的区域内移动, 并且提示 "系统正在初始化, 鼠标已锁"之类似东东. 

原理: 利用 API 函数 ClipCursor和 GetWindowRect 联手实现. 前者指定区域大小, 后者获得整个窗口的范围矩形, 窗口的边框等信息.

代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace ziyiMouse2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "ClipCursor")]
        public extern static int ClipCursor(ref   RECT lpRect);
        [System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "GetWindowRect")]
        public extern static int GetWindowRect(int hwnd, ref   RECT lpRect);

        public struct RECT//声明参数的值
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }
        public void Lock(System.Windows.Forms.Form ObjectForm)
        {
            RECT _FormRect = new RECT();
            GetWindowRect(ObjectForm.Handle.ToInt32(), ref _FormRect);
            ClipCursor(ref   _FormRect);
        }
        public void UnLock()
        {
            RECT _ScreenRect = new RECT();

            _ScreenRect.top = 0;
            _ScreenRect.left = 0;
            _ScreenRect.bottom = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Bottom;
            _ScreenRect.right = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Right;
            ClipCursor(ref   _ScreenRect);
        }
        private void bntKong_Click(object sender, EventArgs e)
        {
            this.Lock(this);
        }

        private void bntMove_Click(object sender, EventArgs e)
        {
            this.UnLock();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

 

3. 利用鼠标拖放复制(剪切)文本

现在基本上所有的文本编辑器都有这个功能: 选中一行字, 然后按下鼠标拖动到另一个位置然后放手即可. 这里演示将一个简单的: 将一个文本框中的内容直接拖动到另一个文本框中(复制粘贴--平时用的文本编辑器是剪切粘贴原理). 

原理: 将第二文本框 ( 目标文本框 ) 的 AllowDrop 属性设为 True. 它指示控件是否可以接受拖放到它上面的数据. 然后再定义一些 MouseMove, DragDrop, DragEnter等事件.

代码:  

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

namespace ziyiMouse3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void txt1_MouseMove(object sender, MouseEventArgs e)
        {
            if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
            {
                this.Cursor = new Cursor("arrow_l.cur");
                DragDropEffects dropEffect = this.txt1.DoDragDrop
               (this.txt1.Text, DragDropEffects.Copy | DragDropEffects.Link);
            }
        }

        private void txt2_DragDrop(object sender, DragEventArgs e)
        {
            txt2.Text = e.Data.GetData(DataFormats.Text).ToString();
        }

        private void txt2_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = DragDropEffects.Copy;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

 

二. 小 CASE 篇

1. 鼠标双击窗体时模拟键盘 Tab 键实现光标移位

原理: 在窗体的 DoubleClick事件中使用 SendKeys 类的 Send 方法实现.

代码: 

        private void Form1_DoubleClick(object sender, EventArgs e)
        {
            SendKeys.Send("{Tab}");
        }

 

2. 定义鼠标形状

原理: 每一个 Winform 控件都有一个 Cursor 属性, 其作用就是改变鼠标形状的. 

( 比如, 常用的是在读大量数据时可以将鼠标形状定义为"忙", 即专业术语--等待状态, 而  当数据读完后恢复默认...) 

代码: 

        private void Form1_Load(object sender, EventArgs e)
        {
            this.labCur .Cursor =Cursors.Hand;
        }

 

3.自定义鼠标图片

原理: 将整个窗体( 注, 不是控件)的 Cursor 属性重新定义.

代码: 

        private void btnClickMe_Click(object sender, EventArgs e)
        {
            this.Cursor = new Cursor("ziyiPicture.cur");
        }

  

4.获得鼠标在窗体上的位置 (汗~~~)

没有原理, 这是常识.

代码: 

private void Form1_MouseDown(object sender, MouseEventArgs e)
{
       this.labX.Text = e.X.ToString ();
       this.labY.Text = e.Y.ToString();
}

 

5.获取鼠标双击时间间隔

 原理: 利用 API 函数 GetDoubleClickTime

 代码:

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

namespace ziyiMouse5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
      
        [System.Runtime.InteropServices.DllImport(
       "user32.dll", EntryPoint = "GetDoubleClickTime")]
        public extern static int GetDoubleClickTime();
        ///鼠标双击时间
        public string DoubleClickTime_Get()
        {
            return GetDoubleClickTime().ToString();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            
            MessageBox.Show(DoubleClickTime_Get());
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
       

    
    }
}

 

6. 隐藏和显示鼠标

原理: API:  ShowCursor

代码:

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

namespace ziyiMouse6
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [System.Runtime.InteropServices.DllImport

       ("user32.dll", EntryPoint = "ShowCursor")]
        public extern static bool ShowCursor(bool bShow);
        //鼠标隐藏
        public void Hide()
        {
            ShowCursor(false);
        }
        //鼠标显示
        public void Show()
        {
            ShowCursor(true);
        }
        private void btnHide_Click(object sender, EventArgs e)
        {
            this.Hide();
        }

        private void btnShow_Click(object sender, EventArgs e)
        {
            this.Show();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

 

三. 无聊篇

1. 获取鼠标键数 

原理: API: GetSystemMetricsg 

代码: 

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

namespace ziyiMouse7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [System.Runtime.InteropServices.DllImport
       ("user32",EntryPoint="GetSystemMetrics")]
        public static extern int GetSystemMetrics(int intcoutn);
        public int  SM_CMOUSEBUTTONS=43;
        private void button1_Click(object sender, EventArgs e)
        {
            int intCon=GetSystemMetrics(SM_CMOUSEBUTTONS);
            MessageBox.Show("我电脑鼠标键数为:"+intCon.ToString());
  
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

 

2. 交换鼠标左右键的功能

原理: API : SwapMouseButton

代码:

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

namespace ziyiMouse8
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [System.Runtime.InteropServices.DllImport(
       "user32.dll", EntryPoint = "SwapMouseButton")]
        public extern static int SwapMouseButton(int bSwap);
        //鼠标右键
        public void DefaultRightButton()
        {
            SwapMouseButton(1);
        }
        //鼠标左键
        public void DefaultLeftButton()
        {
            SwapMouseButton(0);
        }
        //交换鼠标左右键
        private void btnChange_Click(object sender, EventArgs e)
        {
            this.DefaultRightButton();
        }
        //恢复默认设置
        private void btnReset_Click(object sender, EventArgs e)
        {
            this.DefaultLeftButton();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

 

3. 记录鼠标行为

原理: 可在MouseDown 事件中判断您到底单击了鼠标的左右中3个键中的哪一个.

代码:

private void textBox2_MouseDown(object sender, MouseEventArgs e)
        {
            string str=null;
            str=textBox2.Text;
            if (e.Button == MouseButtons.Right)
            {
                str+="鼠标右键被您按下、";
            }
            if(e.Button==MouseButtons.Left)
            {
                str+="您按下了鼠标左键、";
            }
            if(e.Button==MouseButtons.Middle)
            { str+="鼠标中间键按下、";}
            textBox2.Text=str;

}

 

四. 超越篇

1. 禁止使用鼠标左(右)键

直接附代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace ziyiMouse
{
    public partial class Form1 : Form, IMessageFilter
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        public bool PreFilterMessage(ref System.Windows.Forms.Message MyMessage)
        {
            //不响应鼠标左键消息
            if (MyMessage.Msg >= 513 && MyMessage.Msg <= 515)
            {
                return true;
            }
            return false;
        }
        private void button1_Click(object sender, EventArgs e)
        {        
            Application.AddMessageFilter(this);
            MessageBox.Show("鼠标左键已经被禁止，请用Tab键执行操作！", "信息提示",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Application.RemoveMessageFilter(this);
            MessageBox.Show("鼠标左键已经被解禁，可以执行操作！", "信息提示",
         MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private void Form1_Load_1(object sender, EventArgs e)
        {

        }

       
    }
}

 

 

2. 模拟鼠标操作

直接附代码:

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

namespace ziyiMouse9
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [System.Runtime.InteropServices.DllImport("user32")]
        private static extern int mouse_event

       (int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);
        const int MOUSEEVENTF_MOVE = 0x0001;
        const int MOUSEEVENTF_LEFTDOWN = 0x0002;
        const int MOUSEEVENTF_LEFTUP = 0x0004;
        const int MOUSEEVENTF_RIGHTDOWN = 0x0008;
        const int MOUSEEVENTF_RIGHTUP = 0x0010;
        const int MOUSEEVENTF_MIDDLEDOWN = 0x0020;
        const int MOUSEEVENTF_MIDDLEUP = 0x0040;
        const int MOUSEEVENTF_ABSOLUTE = 0x8000;
        private void button1_Click(object sender, EventArgs e)
        {
            mouse_event(MOUSEEVENTF_MOVE, -20, -20, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTDOWN, -20, -20, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);    
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

  

3. 鼠标穿透窗体

直接附代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace ziyiMouse10
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private const uint WS_EX_LAYERED = 0x80000;
        private const int WS_EX_TRANSPARENT = 0x20;
        private const int GWL_STYLE = (-16);
        private const int GWL_EXSTYLE = (-20);
        private const int LWA_ALPHA = 0x2;

        [DllImport("user32", EntryPoint = "SetWindowLong")]
        private static extern uint SetWindowLong(
        IntPtr hwnd,
        int nIndex,
        uint dwNewLong
        );

        [DllImport("user32", EntryPoint = "GetWindowLong")]
        private static extern uint GetWindowLong(
        IntPtr hwnd,
        int nIndex
        );

        [DllImport("user32", EntryPoint = "SetLayeredWindowAttributes")]
        private static extern int SetLayeredWindowAttributes(
        IntPtr hwnd,
        int crKey,
        int bAlpha,
        int dwFlags
        );
        private void Form1_Load(object sender, EventArgs e)
        {
            uint intExTemp = GetWindowLong(
            this.Handle, GWL_EXSTYLE);
            uint oldGWLEx = SetWindowLong(this.Handle, 
           GWL_EXSTYLE, WS_EX_TRANSPARENT | WS_EX_LAYERED);
            SetLayeredWindowAttributes(this.Handle, 0, 100, LWA_ALPHA);
        }


      
    }
}

 

 

后记: 这些案例有的是自己平时工作中写的, 有的是园子里不小心看到的, 有的是直接Google的. 汇总与此为大家引用方便.