Removing the Event listener...
Hi, I want to remove an event associated to a component. I have a button mx:Button id=btn label=RemEvent click=remEvent() / I want to remove the click event handler for the button I tried btn.removeEventListener(click,remEvent). It doesn't seem to be working.Please advise me. Thanks, Anu
RE: [flexcoders] Removing the Event listener...
Hmm, I think its probably harder to
do this straight from the tag. You may need to set this up differently.
mx:Script
var funcToRemove : Function;
function addListener()
{
funcToRemove = mx.utils.Delegate(this,
remEvent);
btn.addEventListener(click,
funcToRemove);
}
Function remEvent()
{
Btn.removeEventListener(click,
funcToRemove);
}
/mx:Script
mx:Button id=btn
initialize=addListener() /
No idea if this works, but should giveyou
the idea. If the Delegates dont work you may need to use a listener
object instead of passing in a straight function. I think we discuss listener
objects in the docs.
Matt
From: anumathew76
[mailto:[EMAIL PROTECTED]
Sent: Thursday, February 24,2005
10:21 PM
To: [EMAIL PROTECTED]
Subject: [flexcoders] Removing the
Event listener...
Hi,
I want to remove an event associated to a
component. I have a button
mx:Button id=btn
label=RemEvent click=remEvent() / I want to
remove the click event handler for the button
I tried
btn.removeEventListener(click,remEvent). It doesn't seem
to be working.Please advise me.
Thanks,
Anu
RE: [flexcoders] Removing the Event listener...
Yes, the cell renderers will be zombied,
sort of. Its not actually truly zombied because we recycle thecell
renderers. When a row isnt needed due to resizing or whatever it goes
on a free list, when its needed well bring it back. What I dont
remember off-hand is if we do decide to clear the free list if we go through
and actually remove the MovieClip. I think it becomes moot if we do that since
the Player will destroy the object. Though there will be dangling references
to undefined I think, but at least you wont have lots of code executing
that you dont want.
Matt
From: Dirk Eismann
[mailto:[EMAIL PROTECTED]
Sent: Friday, February 25, 2005
12:37 AM
To: [EMAIL PROTECTED]
Subject: RE: [flexcoders] Removing
the Event listener...
Btw, I always wondered if references to listeners will get
removed automatically.
For example, a List control myListis using a custom
cellrenderer. The cellrendererinstanceregisters itself with another
componentby doing
listOwner.addEventlistener(change, this)
now if there were 10 visible rows in the List then there
would be 10 listeners (references) added to myList. What happens if I do
myList.removeAll()? Will there be zombie references to the cell
renderer instances because they are still stored inside the array of listeners
for the List control?
Thanks,
Dirk.
-Original
Message-
From: Matt Chotin [mailto:[EMAIL PROTECTED]
Sent: Friday, February 25, 2005
7:39 AM
To: [EMAIL PROTECTED]
Subject: RE: [flexcoders] Removing
the Event listener...
Hmm, I think its probably harder to
do this straight from the tag. You may need to set this up differently.
mx:Script
var funcToRemove : Function;
function addListener()
{
funcToRemove =
mx.utils.Delegate(this, remEvent);
btn.addEventListener(click, funcToRemove);
}
Function remEvent()
{
Btn.removeEventListener(click, funcToRemove);
}
/mx:Script
mx:Button id=btn
initialize=addListener() /
No idea if this works, but should giveyou
the idea. If the Delegates dont work you may need to use a
listener object instead of passing in a straight function. I think we
discuss listener objects in the docs.
Matt
From: anumathew76
[mailto:[EMAIL PROTECTED]
Sent: Thursday, February 24,2005
10:21 PM
To: [EMAIL PROTECTED]
Subject: [flexcoders] Removing the
Event listener...
Hi,
I want to remove an event associated to a
component. I have a button
mx:Button id=btn
label=RemEvent click=remEvent() / I want to
remove the click event handler for the button
I tried
btn.removeEventListener(click,remEvent). It doesn't seem
to be working.Please advise me.
Thanks,
Anu
RE: [flexcoders] Removing the Event listener...
Wouldn't itbe a good enhancement to the EventDispatcher mix-in then
to wipe references to undefined automatically when the removeEventListener()
method is invoked?
Dirk.
-Original Message-From: Matt Chotin
[mailto:[EMAIL PROTECTED]Sent: Friday, February 25, 2005
10:34 AMTo: flexcoders@yahoogroups.comSubject: RE:
[flexcoders] Removing the Event listener...
Yes, the cell
renderers will be zombied, sort of. Its not actually truly zombied
because we recycle the cell renderers. When a row isnt needed due to
resizing or whatever it goes on a free list, when its needed well bring it
back. What I dont remember off-hand is if we do decide to clear the
free list if we go through and actually remove the MovieClip. I think it
becomes moot if we do that since the Player will destroy the object.
Though there will be dangling references to undefined I think, but at least
you wont have lots of code executing that you dont
want.
Matt
From: Dirk
Eismann [mailto:[EMAIL PROTECTED] Sent: Friday, February 25, 2005 12:37
AMTo:
flexcoders@yahoogroups.comSubject: RE: [flexcoders] Removingthe
Event listener...
Btw, I always wondered if
references to listeners will get removed automatically.
For example, a List control
myListis using a custom cellrenderer. The
cellrendererinstanceregisters itself with another componentby
doing
listOwner.addEventlistener("change", this)
now if there were 10 visible rows
in the List then there would be 10 listeners (references) added to myList.
What happens if I do myList.removeAll()? Will there be "zombie" references to
the cell renderer instances because they are still stored inside the array of
listeners for the List control?
Thanks,
Dirk.
-Original
Message-From: Matt
Chotin [mailto:[EMAIL PROTECTED]Sent: Friday, February 25, 2005 7:39
AMTo:
flexcoders@yahoogroups.comSubject: RE: [flexcoders] Removingthe
Event listener...
Hmm, I thinkits
probably harder to do this straight from the tag. You may need toset
this up differently.
mx:Script
var
funcToRemove : Function;
function
addListener()
{
funcToRemove = mx.utils.Delegate(this,
remEvent);
btn.addEventListener(click, funcToRemove);
}
Function
remEvent()
{
Btn.removeEventListener(click, funcToRemove);
}
/mx:Script
mx:Button
id=btn initialize=addListener() /
No idea if this
works, but should give you the idea. If the Delegates dontwork you
may need to use a listener object instead of passing in a straight
function. I think we discuss listener objects in the
docs.
Matt
From:
anumathew76 [mailto:[EMAIL PROTECTED] Sent: Thursday, February 24, 2005 10:21
PMTo:
flexcoders@yahoogroups.comSubject: [flexcoders] Removing the
Event listener...
Hi,I want to
remove an event associated to a component. I have a
buttonmx:Button
id="btn" label="RemEvent" click="remEvent()" / I want to
remove the click event handler
for the buttonI tried
btn.removeEventListener("click",remEvent). It doesn't seem
to be working.Please advise
me.Thanks,Anu
