让WinForm控件同时使用单击和双击事件

  如果给一个控件同时添加了单击事件和双击事件,那么在触发双击事件前必然会触发单击事件,为了解决这个问题,在网上一顿找,在msdn上找到了微软提供的解决方法:http://msdn.microsoft.com/en-us/library/ms171543(VS.80).aspx。英文好的同学可以不往下看了,:-D。

  其主要思想是:单击鼠标时,启动一个Timer,Timer起计时器作用,Timer运行时间超过了一次双击鼠标所用的最长时间,而第二次鼠标点击事件还没有发生时,就认为是单击,反之,如果在一个鼠标双击所用时间的最长时间内,又一次触发了鼠标点击事件,则可视为双击。

  以下是实例代码:

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

namespace DoubleClick
{
    public partial class Form1 : Form
    {
        private bool _isFirstClick = true;
        private bool _isDoubleClick = false;
        private int _milliseconds = 0;
        private Timer _doubleClickTimer;
        private Rectangle _doubleRec;

        public Form1()
        {
            InitializeComponent();
            this.button1.MouseDown += new MouseEventHandler(button1_MouseDown);
            _doubleClickTimer = new Timer();
            _doubleClickTimer.Interval = 100;
            _doubleClickTimer.Tick += new EventHandler(_doubleClickTimer_Tick);
        }

        //_doubleClickTimer的Tick事件
        private void _doubleClickTimer_Tick(object sender, EventArgs e)
        {
            _milliseconds += 100;
            if (_milliseconds >= SystemInformation.DoubleClickTime)
            {
                _doubleClickTimer.Stop();
                if (_isDoubleClick)
                {
                    MessageBox.Show("Double Click");
                }
                else
                {
                    MessageBox.Show("Single Click");
                }
                _isDoubleClick = false;
                _isFirstClick = true;
                _milliseconds = 0;
            }
        }

        //鼠标按下事件
        private void button1_MouseDown(object sender, MouseEventArgs e)
        {
            if (_isFirstClick)
            {
                _doubleRec = new Rectangle(e.X - SystemInformation.DoubleClickSize.Width / 2,
                    e.Y - SystemInformation.DoubleClickSize.Height / 2,
                    SystemInformation.DoubleClickSize.Width,
                    SystemInformation.DoubleClickSize.Height);
                _isFirstClick = false;
                _doubleClickTimer.Start();
            }
            else
            {
                if (_doubleRec.Contains(e.Location))
                {
                    _isDoubleClick = true;
                }
            }
        }
    }
}

posted @ 2010-09-27 22:20  会长  阅读(1379)  评论(0编辑  收藏  举报