This exact question was asked today at TAE.
At this time, no. stopObserving will not go through the children of
the container and remove events. In the future it is certainly
possible. Mind you it wouldn't be very difficult to write your own
method to recurse through all the children of a given element, and
call stopObserving on those children.
var elem = $("myElement");
elem.stopObserving()
elem.select("*").invoke("stopObserving");
On Oct 1, 11:02 am, "labs2.0" <[EMAIL PROTECTED]> wrote:
> Hi. Please, would you be kind to clearify this to me: if I call
> "Event.stopObserving(myWindow)", beeing 'myWindow' a div (ajax
> generated window wich can came and go as the user will), who doesnt
> have observers, but its a container (and parent) for many other
> elements (components) that may does, may doesn't have observers, will
> this call work recursivelly? If dont, why???
>
> Assuming it doesnt, and that prototype beautifully make things in a
> clean and natural way, should'nt we espect some behaviour like that? I
> mean, in a large framework, where I create a window with many comps,
> one could say that its my job to create a event garbage collector
> (which I did hacking prototype 1.5.0) to clean up things when, say, a
> window pops out, but then again, if I already have a nice way to setup
> events, its ask too much to have a nice one to get rid off of all of
> them too? :)
>
> In prototype 1.5.0 I've hacked a "Event.observeFor(container, element,
> event)" and a " Event.unloadContainer(container);" for memory sake.
>
> Am I missing something new (and cool) about Events here?
>
> Thank you and let me be +1 to say that prototype ROCKS!!
>
> []'s
> Labs
>
> On 10 set, 09:38, "T.J. Crowder" <[EMAIL PROTECTED]> wrote:
>
> > Hi folks,
>
> > > try a look at the API
> > > documentation:http://www.prototypejs.org/api/event/stopObserving
> > > (you exactly do what is wrong !!)
>
> > Actually, David, what she's doing is just fine. She's using a
> > new(ish) feature of stopObserving which appears to be missing from the
> > docs. If you don't include a handler in the stopObserving call, ALL
> > events hooked up by observe() for the giveneventname on the given
> > element will be removed. This is quite handy. Even better, if you
> > leave off theeventname as well, stopObserving() will unhook all of
> > the handlers for that element [that were set up by observe()]
> > entirely.
>
> > So this would be wrong:
>
> > Event.observe(myelement, 'click',
> > this.clickHandler.bindAsEventListener(this));
> > ...
> > Event.stopObserving(myelement, 'click',
> > this.clickHandler.bindAsEventListener(this));
>
> > because the function arguments don't match.
>
> > But this is fine:
>
> > Event.observe(myelement, 'click',
> > this.clickHandler.bindAsEventListener(this));
> > ...
> > Event.stopObserving(myelement, 'click');
>
> > It removes *all* click handlers hooked using observe() from the
> > element.
>
> > And this is fine:
>
> > Event.observe(myelement, 'click',
> > this.clickHandler.bindAsEventListener(this));
> > ...
> > Event.stopObserving(myelement);
>
> > It removes *all* handlers for all events hooked using observe() from
> > the element. Great for when you're about to remove the element.
>
> > I'll see if there's a doc ticket in Lighthouse for this and add one if
> > there isn't.
> > --
> > T.J. Crowder
> > tj / crowder software / com
>
> > On Sep 10, 12:14 pm, david <[EMAIL PROTECTED]> wrote:
>
> > > Hi Lea,
>
> > > try a look at the API
> > > documentation:http://www.prototypejs.org/api/event/stopObserving
> > > (you exactly do what is wrong !!)
>
> > > Because you should do:
>
> > > myTestClass.myCallback=this.clickHandler.bindAsEventListener(this);
>
> > > myTestClass.prototype.initEvents = function()
> > > {
> > > var myDiv1 = $('exampleDiv1');
> > > myDiv1.observe('click',myTestClass.myCallback);
>
> > > }
>
> > > And to stopeventobserve:
>
> > > myTestClass.prototype.clearEvents = function()
> > > {
> > > var myDiv1 = $('exampleDiv1');
> > > myDiv1.stopObserving('click',myTestClass.myCallback);
>
> > > }
>
> > > But we are from the original question which is if we could
> > > stopObserving alleventfrom one element?
> > > The response is NO (otherwise, let me know, it save a lot of time and
> > > efforts sometime).
>
> > > --
> > > david
>
> > > On Sep 2, 8:41 pm, Kruncher <[EMAIL PROTECTED]> wrote:
>
> > > > Hi,
>
> > > > I have just found out about the Prototype framework and am somewhat
> > > > impressed by how much simpler it makes things. I have found that using
> > > > the observe and stopObserving functions has eliminated a pretty major
> > > >memoryleak within my scripts.
>
> > > > Below is a snippet of my code (which appears to function correctly
> > > > with Prototype 1.6), but I just wanted to confirm that this is in fact
> > > > correct. From the user documentation it says that the stopObserving
> > > > method should be called in practically the same way as the observe
> > > > method. However, I want to make sure that ALL handlers are stopped for
> > > > a particulareventof a particular element.
>
> > > > // Called when object is initialized.
> > > > myTestClass.prototype.initEvents = function()
> > > > {
> > > > var myDiv1 = $('exampleDiv1');
> > > > myDiv1.observe('click',
> > > > myTestClass.clickHandler.bindAsEventListener(this));}
>
> > > > // Called whenever an object is destroyed.
> > > > myTestClass.prototype.clearEvents = function()
> > > > {
> > > > var myDiv1 = $('exampleDiv1');
> > > > myDiv1.stopObserving('click'); // Is this line acceptable
> > > > to stop ALL click events for myDiv1?
>
> > > > }
>
> > > > Many thanks,
> > > > Lea Hayes
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