拉斐尔画布（背景）onclick事件 [英] Raphael canvas (background) onclick event

问题描述

我一直在与Raphael一起在画布上创建拖放形状。我使用 .drag（）函数（在Raphael框架中提供）以及事件函数来执行此操作。我没有问题。

I have been working with Raphael to create drag and drop shapes on a canvas. I do this using the .drag() function (supplied in the Raphael framework) along with my event functions. I have no issues doing this.

我还有一个函数可以创建新形状 onDblClick ，问题是，我只能将事件附加到形状或我创建的其他元素上。

I also have a function that creates a new shape onDblClick, the problem is, I can only attach the event to a shapes, or other elements I create.

将事件添加到形状中的方式如下：

Adding events to a shape works like so:

  R = Raphael("canvas", "100%", "100%"),
  R.rect(100, 100, 25, 50).attr({fill: fillColor}).dblclick(myDblClick);

在画布上使用相同的原理不起作用：

Using the same principle on the canvas doesn't work:

  R = Raphael("canvas", "100%", "100%"),
  R.dblclick(myDblClick);

有人知道将单击事件附加到画布上的方法吗，即我可以单击div中的任何位置（不包括形状）并且事件将被触发。

Does anybody know a way to attach click events to the canvas, i.e. I can click anywhere in the div (excluding shapes) and the event will be triggered.

推荐答案

我只需附加常规click事件（使用普通javascript或任何js框架，正在使用）到画布节点（或包含#canvas元素的父节点）。

I would just attach the regular click event (with vanilla javascript, or whatever js framework you are using) to the the canvas node (or the parent node that contains the #canvas element).

使用jquery：

//Bound to canvas
$('#canvas').bind('dblclick', myDblClick);
//Bound to parent
$('#canvas').parent().bind('dblclick', myDblClick);

否则，如果您对使用Raphael事件一无所知，则可以在整个矩形上绘制一个矩形画布，并捕获其上的点击事件。但这似乎有很多开销。

Otherwise, if you are dead-set on using Raphael events, you could draw a rectangle over the entire canvas, and capture click events on that. but that seems like a lot of overhead.

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