如何使用javascript计时来控制鼠标停止和鼠标移动事件 [英] How can I use javascript timing to control on mouse stop and on mouse move events
问题描述
所以我在aspx页面上有一个控件(一张地图)。我想写一些javascript来onload设置如下:
So I have a control (a map) on an aspx page. I want to write some javascript to onload setup the following:
-
当鼠标停在控制上时=某些代码
when mouse stops on control = some code
当鼠标移动=某些代码时(但仅当移动时间超过250毫秒时)
when mouse moves = some code (but only if the move is longer than 250 mil sec)
这适用于在停止然后移动时触发代码......
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);
};
})();
};
但我无法弄清楚如何在移动代码中引入延迟。我以为我有这个... ...
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);
};
})();
};
但它的行为并不像我想象的那样。移动thread2永远不会被停止清除。我错过了什么?
But it does not behave as I thought it would. The on move "thread2" is never cleared by the stop. What am I missing?
推荐答案
这是一个棘手的问题。一点点的修补就是这样:
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
};
})();
};
您的代码不起作用的原因是当鼠标移动并且您正在启动时,mousemove会反复触发每次都有新的超时。
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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