Colin Mollenhour wrote:
> This is one of those things that gets to be very tedious when working
> with Event.observe.
> Currently, you have to store the function like so:
>
> this.onMousedownListener = this.onMousedown.bindAsEventListener(this);
> Event.observe(document, "mousedown", this.onMousedownListener);
> Event.stopObserving(document,"mousedown",this.onMousedownListener);
>
I understand that cross-browser element observation is very complex when
you start thinking about caching, stopping observation, and dealing with
IE's limitations--just look at the comments and links here:
http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html.
A different approach occurred to me. What are the thoughts on having
Event.observe return something? For example, the code above could become:
this.onMousedownListener = Event.observe(document, "mousedown",
this.onMousedown.bindAsEventListener(this));
Event.stopObserving(document,"mousedown",this.onMousedownListener);
Or what about an even simpler approach:
var handle = Event.observe(document, 'mousedown',
this.onMousedown.bindAsEventListener(this));
handle.stopObserving();
...where Event.observe returns a object "handle":
Event.observe = function(element, name, observer) {
element = $(element);
...IE model...
element.addEventListener(name, observer, false);
return {
stopObserving: function() {
element.removeEventListener(name, observer, false);
},
element: element,
event: name,
function: observer
};
};
The above function would lend itself nicely to the caching of handles,
stopping all observation of a particular element or element+event,
clearing all on IE unload, and it could be made to be 100% backwards
compatible with the use of Event.stopObserving.
What do you think?
-- Ken Snyder
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Spinoffs" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/rubyonrails-spinoffs?hl=en
-~----------~----~----~----~------~----~------~--~---
