获取所选SVG元素的边界框

Question

I want to read:

• width , height , x , y measurements

for a particular SVG element.

---

I suppose that easiest way to go about this is to fetch the minimum bounding box first and read it's properties.

How can I access this?

Answer 1

If you have a reference to the DOM node, use

svgNode.getBoundingClientRect()

https://developer.mozilla.org/en-US/docs/DOM/element.getBoundingClientRect

Edit: SVG Edit has a method to return currently selected elements:

svgCanvas.getSelectedElems()

so in the above example:

svgNode = svgCanvas.getSelectedElems()[0];
svgNode.getBoundingClientRect();

Answer 2

Please see http://granite.sru.edu/~ddailey/svg/BBox0M.svg for the example and answer.

In brief, this code works for me in Chrome:

<script>
function foo(evt)
{
    console.log(evt.target.getBBox());      
}
</script>

<svg>
    <circle onclick="foo(evt)" r="20%" cx="50%" cy="50%"/>
</svg>

Answer 3

I'm not sure if I'm understanding you correctly, but if you're looking to get the height or width of a jQuery element, use width() and height():

log("The svg is " + $("img").width() + "px wide.");
log("The svg is " + $("img").height() + "px tall.");

JSFiddle example: http://jsfiddle.net/gGWU4/

Answer 4

假设你有元素的句柄，我会认为这会起作用，不是吗？

box = svgedit.utilities.getBBox(selected);