如何知道raphael对象是否被隐藏？ [英] How to know if raphael object is hidden?

问题描述

我正在创建一个图表应用程序，其中我隐藏并显示一些元素，例如

I am creating a diagram application in which I hide and show few elements e.g.

var c = paper.circle(10, 10, 10);
c.hide()

var c2 = paper.circle(10, 10, 10);
c2.show()

现在我想对这样的形状采取行动，例如：计算边界框等但我无法找到如果隐藏或不隐藏形状的方法？有没有像这样的shape.is_visible（）或shape.attr（'visible'）

Now I want to act upon such shapes e.g. calculate bounding box etc but I am not able to find how to get if shape is hidden or not? Is there something like this shape.is_visible() or shape.attr('visible')

推荐答案

我看了一眼文档和源代码，并将其煮熟（未经测试）：

I took a look at the documentation and source code and cooked this up (untested):

Raphael.el.is_visible = function() {
    return (this.node.style.display !== "none");
}

请致电如下：

var c = paper.circle(10, 10, 10);
c.hide();
if (c.is_visible())
    alert("Visible");
else
    alert("Invisible");

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