如何使用 javascript 计时来控制鼠标停止和鼠标移动事件

发布于 2024-07-06 19:49:30 字数 1199 浏览 8 评论 0原文

所以我在 aspx 页面上有一个控件(地图)。 我想编写一些 javascript 来加载以下设置:

  1. 当鼠标停止在控件上时 = 一些代码

  2. 当鼠标移动时 = 一些代码(但前提是移动长于 2.5 亿秒)

这可以在停止时触发代码,然后在移动时触发代码...

function setupmousemovement() {
var map1 = document.getElementById('Map_Panel');
var map = document.getElementById('Map1');
map1.onmousemove = (function() {
    var onmousestop = function() {
            //code to do on stop
    }, thread;

    return function() {
        //code to do on mouse move
        clearTimeout(thread);
        thread = setTimeout(onmousestop, 25);
    };
    })();
};

但我不知道如何在移动代码中引入延迟。 我以为我已经拥有了它......

function setupmousemovement() {
var map1 = document.getElementById('Map_Panel');
var map = document.getElementById('Map1');
map1.onmousemove = (function() {
    var onmousestop = function() {
            //code to do on stop
            clearTimeout(thread2);
    }, thread;

    return function() {
        thread2 = setTimeout("code to do on mouse move", 250);
        clearTimeout(thread);
        thread = setTimeout(onmousestop, 25);
    };
    })();
};

但它的行为并不像我想象的那样。 移动中的“thread2”永远不会被停止清除。 我缺少什么?

So I have a control (a map) on an aspx page. I want to write some javascript to onload setup the following:

  1. when mouse stops on control = some code

  2. when mouse moves = some code (but only if the move is longer than 250 mil sec)

This works to trigger code on stop and then on move...

function setupmousemovement() {
var map1 = document.getElementById('Map_Panel');
var map = document.getElementById('Map1');
map1.onmousemove = (function() {
    var onmousestop = function() {
            //code to do on stop
    }, thread;

    return function() {
        //code to do on mouse move
        clearTimeout(thread);
        thread = setTimeout(onmousestop, 25);
    };
    })();
};

But I cannot figure out how to introduce a delay into the on move code. I thought I had it with this...

function setupmousemovement() {
var map1 = document.getElementById('Map_Panel');
var map = document.getElementById('Map1');
map1.onmousemove = (function() {
    var onmousestop = function() {
            //code to do on stop
            clearTimeout(thread2);
    }, thread;

    return function() {
        thread2 = setTimeout("code to do on mouse move", 250);
        clearTimeout(thread);
        thread = setTimeout(onmousestop, 25);
    };
    })();
};

But it does not behave as I thought it would. The on move "thread2" is never cleared by the stop. What am I missing?

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评论(1

清君侧 2024-07-13 19:49:30

这是一个棘手的问题。 一些修补导致了这一点:

function setupmousemovement() {

  var map1 = document.getElementById('Map_Panel');
  map1.onmousemove = (function() {
    var timer,
        timer250,
        onmousestop = function() {

          // code to do on stop

          clearTimeout( timer250 ); // I'm assuming we don't want this to happen if mouse stopped
          timer = null;  // this needs to be falsy next mousemove start
        };
    return function() {
      if (!timer) {

        // code to do on start

        timer250 = setTimeout(function () { // you can replace this with whatever

          // code to do when 250 millis have passed

        }, 250 );
      }
      // we are still moving, or this is our first time here...
      clearTimeout( timer );  // remove active end timer
      timer = setTimeout( onmousestop, 25 );  // delay the stopping action another 25 millis
    };

  })();

};

您的代码不起作用的原因是 mousemove 在鼠标移动时重复触发,并且您每次都开始新的超时。

That is a tricky one. A little bit of tinkering resulted in this:

function setupmousemovement() {

  var map1 = document.getElementById('Map_Panel');
  map1.onmousemove = (function() {
    var timer,
        timer250,
        onmousestop = function() {

          // code to do on stop

          clearTimeout( timer250 ); // I'm assuming we don't want this to happen if mouse stopped
          timer = null;  // this needs to be falsy next mousemove start
        };
    return function() {
      if (!timer) {

        // code to do on start

        timer250 = setTimeout(function () { // you can replace this with whatever

          // code to do when 250 millis have passed

        }, 250 );
      }
      // we are still moving, or this is our first time here...
      clearTimeout( timer );  // remove active end timer
      timer = setTimeout( onmousestop, 25 );  // delay the stopping action another 25 millis
    };

  })();

};

The reason your code does not work is that mousemove fires repeatedly while the mouse is moving and you are starting new timeouts every time.

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