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Groups > comp.lang.javascript > #8831
| From | "J.R." <groups_jr-1@yahoo.com.br> |
|---|---|
| Newsgroups | comp.lang.javascript |
| Subject | Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions |
| Date | 2011-12-03 19:50 -0200 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <jbe5iu$2dr$1@speranza.aioe.org> (permalink) |
| References | <bd12b66f-33f5-43d2-8e22-6f81b42c3d8b@n14g2000vbn.googlegroups.com> <lKvGLxF5SZvOFwvl@invalid.uk.co.demon.merlyn.invalid> <24925190-dfd1-4c2c-a804-8b7fac1fc3ab@m10g2000vbc.googlegroups.com> |
On 03/12/2011 00:38, David Mark wrote:
> On Nov 11, 4:33 pm, Dr J R Stockton<reply1...@merlyn.demon.co.uk>
> wrote:
>>
>> One Tip might be the answer to "I have an on-screen element, of known
>> size, with an on[dbl]click method; how do I obtain the co-ordinates of a
>> [double-]click with respect to a given position in the element itself?"
>>
>
> Tricky. :)
>
> Your best bet is to see the tip of the day related to coordinates.
> From that you should be able to get the coordinates of the element
> relative to the viewport (or "window" as I think I referred to it in
> that post). So you will need the mouse coordinates relative to the
> viewport. Ironically enough, it's trivial to find those in the old IE
> versions that lacked pageX/Y properties. But for everything else, you
> have to have to subtract the scroll position as pageX/Y are relative
> to the document. Depending on context, getting the scroll position is
> either trivial (one-liner) or fairly complex. Frustratingly, it's IE
> (all versions AFAIK) that needs most of the extra code in this case.
> You also have to consider other factors like whether you will need
> this to work in quirks mode (hopefully not)
>
>
> It looks like:-
>
> // No quirks mode, frames or other windows (just the one running the
> script)
>
> var getScrollPosition;
>
> if ('number' == typeof window.pageXOffset) {
>
> // Many "standards-based" browsers feature this non-standard
> property
> // No ambiguity about what this window property means
window.pageYOffset is available as of IE9, FF3+, Safari 4+, Chrome 4+,
Opera 10+.
IE 8 and older browsers in standards-compliant mode (strict mode) would use:
if (document.documentElement && document.documentElement.scrollTop) {
return document.documentElement.scrollTop;
}
But IE in quirks mode (tested with IE8) would use:
if (document.body) {
return document.body.scrollTop;
}
--
Joao Rodrigues (J.R.)
> getScrollPosition = function() {
> return [window.pageXOffset, window.pageYOffset];
> };
> } else if (document.documentElement&& 'number' == typeof
> document.documentElement.scrollTop) {
>
> // Proprietary IE properties, copied widely by others; often 0,0 in
> mobile browsers,
> // Ambiguous as many mobiles represent an un-scrolled document (i.e.
> scrollHeight == clientHeight), regardless of which portion of document
> is viewable
>
> getScrollPosition = function() {
> return [document.documentElement.scrollLeft,
> document.documentElement.scrollTop];
> };
> }
>
> As usual, simplified feature detection (use isHost* functions) and
> untested. Paste at your own risk.
>
> One other thing, I wouldn't trust that you can get the mouse position
> in a click or dblclick listener. Not sure what the standard
> recommendation is, but I know I never retrieve the position from
> anything but mousedown/move/up. ISTM that, at least traditionally,
> that's all you can expect to work reliably. And by "work", I mean
> across most browsers released this century. There's no way anything
> like this can be considered cross-browser. There's at least a couple
> of other pairs of properties where at least some mobiles insist on
> stashing their "scroll" position (offsetLeft/Top comes to mind). So
> there's at least one more prong and not based on any sort of logic,
> just observation.
>
> Needless to say, getting the "viewport" scroll position is something
> to avoid whenever possible (most of the time). But as soon as you
> start with the mouse position, at least for years to come, you
> introduce that dependency.
>
> Having said all of that, perhaps somebody out there who has actually
> needed to tackle this problem has a cleaner, context-specific solution
> that works in an acceptable subset of browsers. The big issue is that
> there is no way to feature test the scroll position in advance, short
> of actually setting the scroll position (which is clearly out of the
> question).
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David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-11-10 06:09 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-11-10 16:57 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-11-10 11:54 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Ant" <not@home.today> - 2011-11-10 19:47 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-11-10 13:07 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Matt McDonald <matt@fortybelow.ca> - 2011-11-10 14:12 -0700
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-11-11 07:26 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Frobernik <nospam@nospam.com> - 2011-11-17 22:43 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 16:08 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Frobernik <nospam@nospam.com> - 2011-12-06 21:18 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-06 14:13 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Gene Wirchenko <genew@ocis.net> - 2011-11-10 13:17 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Evertjan." <exjxw.hannivoort@interxnl.net> - 2011-11-10 22:43 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Richard Cornford" <Richard@litotes.demon.co.uk> - 2011-11-11 00:36 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Gene Wirchenko <genew@ocis.net> - 2011-11-10 19:14 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Richard Cornford" <Richard@litotes.demon.co.uk> - 2011-11-11 09:59 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Gene Wirchenko <genew@ocis.net> - 2011-11-11 11:04 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-11-11 14:39 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-11-12 10:38 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Richard Cornford" <Richard@litotes.demon.co.uk> - 2011-11-12 19:19 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2011-11-12 21:07 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-13 00:42 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Richard Cornford" <Richard@litotes.demon.co.uk> - 2011-11-13 14:33 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2011-11-17 23:14 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Richard Cornford" <Richard@litotes.demon.co.uk> - 2011-11-17 23:55 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-11-13 20:22 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions RobG <rgqld@iinet.net.au> - 2011-11-13 08:29 +1000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-11-13 20:25 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions RobG <rgqld@iinet.net.au> - 2011-11-13 23:05 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Tim Down <timdown@gmail.com> - 2011-11-14 03:41 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions RobG <rgqld@iinet.net.au> - 2011-11-16 16:18 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 16:03 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-11-15 16:52 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 15:54 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "Jukka K. Korpela" <jkorpela@cs.tut.fi> - 2011-11-13 10:38 +0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Dr J R Stockton <reply1145@merlyn.demon.co.uk> - 2011-11-11 21:33 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 15:00 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 18:38 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-12-03 19:50 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-03 15:50 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-03 16:38 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-03 17:14 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2011-12-04 11:07 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-04 02:45 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-04 13:37 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-04 16:01 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-04 16:28 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-04 18:56 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions John G Harris <john@nospam.demon.co.uk> - 2011-12-05 14:39 +0000
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-05 11:00 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-03 19:17 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-11-13 00:06 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-13 04:31 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-11-13 13:44 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-13 18:35 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-11-13 22:00 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-14 12:40 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions "J.R." <groups_jr-1@yahoo.com.br> - 2011-11-14 11:52 -0200
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-14 15:40 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2011-11-17 11:16 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-11-17 21:06 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2011-11-17 22:13 +0100
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 15:19 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 15:10 -0800
Re: David Mark's Javascript Tip Du Jour - Volume #1 - Tip #1234 - How to Measure Element Dimensions David Mark <dmark.cinsoft@gmail.com> - 2011-12-02 18:04 -0800
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