The Offset* APIs are based on the location relative to the parent element. You'll need to compute the offset by walking the DOM using "offsetParent". (Don't use the DOM parent or you'll get wacky results due to the way tables are constructed.) Add up the offsetLeft values for each offsetParent and you'll arrive at the true location of the Canvas.
Thanks,
Jerason
On Mon, Dec 15, 2008 at 5:00 AM, Richard Heyes <richard.heyes@...> wrote:
Hi,
I'm having severe trouble getting the mouse coords when a canvas is
colicked on AND it's nested within a table. I've setup an example to
illustrate the issue here:
The top graph is within a table, and when you click on it, it shows
you the position of the mouse pointer (which seems fine), and the
offsetLeft of the canvas, which is coming up as 1. Clearly it
shouldn't be. I need the position of the canvas on the page, or the
position of the mouse relative to the canvas. The bottom graph is not
in a table, using a DIV for positioning, and this is fine.
Thanks for any help.
--
Richard Heyes
HTML5 Graphing for FF, Chrome, Opera and Safari: http://www.rgraph.org (Updated December 5th)
Hi, I'm having severe trouble getting the mouse coords when a canvas is colicked on AND it's nested within a table. I've setup an example to illustrate the...
Richard Heyes
richard.heyes@...
Dec 15, 2008 11:00 am
The Offset* APIs are based on the location relative to the parent element. You'll need to compute the offset by walking the DOM using "offsetParent". (Don't...
... Hi, That's what I was afraid of. Still, I've manged to do it (!): http://dev.rgraph.org/ Thank you! -- Richard Heyes HTML5 Graphing for FF, Chrome, Opera...
... Hi, Seems I spoke too soon. Sorry for the noise. -- Richard Heyes HTML5 Graphing for FF, Chrome, Opera and Safari: http://www.rgraph.org (Updated December...
Richard Heyes
richard.heyes@...
Dec 15, 2008 5:11 pm
... For anyone that's interested I've now managed to get it working: http://dev.rgraph.org I used [event].offsetX/Y for Safari, Opera, MSIE and Chrome, and for...
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