在画布html5页面上向下和向上模拟鼠标 [英] simulate a mouse down and up on a canvas html5 page

问题描述

我如何在aspx页面的画布hmtl5部分上模拟鼠标，然后是鼠标按下事件？

How can I simulate a mouse down and then followed by a mouse up event on a canvas hmtl5 section of an aspx page?

我在网上搜索并找到了这...但我无法将此与我的画布html5元素相关联，任何人都可以帮忙吗？

I searched on the web and found this... but i cannot correlate this to my canvas html5 element, Can anyone help ?

dispatchMouseEvent(element, 'mouseover', true, true);
dispatchMouseEvent(element, 'mousedown', true, true);
dispatchMouseEvent(element, 'click', true, true);
dispatchMouseEvent(element, 'mouseup', true, true);

推荐答案

模拟事件非常简单，事实上，你可以简单地触发它们。使用jQuery，这成为了孩子的游戏（参见这个jsfiddle 的工作示例）：

"Simulating" events is very easy, in fact, you can simply trigger them. Using jQuery, this becomes child's play (see this jsfiddle for working example):

$('#canvas_element').on("mousedown mouseup", function(e) {
console.log(e.type + " event fired at coords: " + e.pageX + ", " + e.pageY);
});

x_coord = 1;
y_coord = 1;

var e = jQuery.Event( "mousedown", { pageX: x_coord, pageY: y_coord } );
$('#canvas_element').trigger(e);

// execute more code
x_coord = 255;
y_coord = 255;

var e = jQuery.Event( "mouseup", { pageX: x_coord, pageY: y_coord } );
$('#canvas_element').trigger(e);

参见这个旧的SO问题，用于纯粹的JavaScript解决方案。

See this old SO question for a pure javascript solution.

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