如何找出鼠标坐标(setTimeout问题)? [英] How to find out mouse coordinates (setTimeout issue)?

问题描述

下面是说明所有内容的代码:

Here's the code that explains it all:

$('#elem123').mouseenter(function () {
 setTimeout(function () {
   //what are mouse coords?
 }, 650);           
});

推荐答案

鼠标坐标 经过650毫秒之后，相对于元素，我猜呢? (改编自 http://docs.jquery.com/Tutorials:Mouse_Position )

Mouse coordinates after the 650 ms have elapsed, and relative to the element, I am guessing? (Adapted from http://docs.jquery.com/Tutorials:Mouse_Position)

查看有效的演示

See a working demo

var mouseX = 0, mouseY = 0;

$(document).mousemove(function(event) {
    mouseX = event.pageX;
    mouseY = event.pageY;
});

$('#elem123').mouseenter(function () {
    var t = this;
    setTimeout(function () {
        var localMouseX = mouseX - t.offsetLeft;
        var localMouseY = mouseY - t.offsetTop;
    }, 650);
});

为什么使用mousemove和offsetLeft?原因是只有发生此类事件时鼠标位置才对我们可用(并且仅相对于整个页面). jQuery没有提供更直接的方法来获取它.

Why use mousemove and offsetLeft? The reason is that the mouse position is only available to us when such an event happens (and only relative to the entire page). jQuery does not provide a more direct way to obtain it.

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