RE: [flexcoders] Flex 2 Final : Error #1009, in RadioButton/get labelPlacement()

[Benoit Hediard]

I've investigated this issue a little bit 
more.
It looks like there some problems with RadioButton when 
they are used in groups.
First display is generally correct, but when the display 
list is refreshed, it generates some bugs.

 
In our case, the RadioButton group is used in a 
popup, and even after the popup is deleted, some popup 
display routines are still 
executed.
 
When debugging is on, the error is generated in 
RadioButton.as, at line 172, because the property group is 
null :
if (_labelPlacement != "") {
    value = 
_labelPlacement;
} else if (_group && 
group.labelPlacement != "") { // L.172
    value = 
group.labelPlacement;
}
 
Workaround : always define labelPlacement 
in all your RadioButton (so that the group labelPlacement is never 
read).
 
I've also encountered a similar error in another case : 
RadioButton groups used inside a Repeater, with the groupName defined during the 
repeater execution (groupName="{theRepeater.currentIndex}").
First execution is correct, but the next ones generate 
an error.
 
When debugging is on, the error is generated 
in the RadioButton.as, at line 454, for the same reason (property 
group is null) :
var g:RadioButtonGroup = group:
g.addInstance(this); // 
L.454
 
I haven't found a workaround for this 
one.
 
It's too bad because all of this was working in previous 
beta but not on the final release ;).
 
Benoit Hediard


De : flexcoders@yahoogroups.com 
[mailto:[EMAIL PROTECTED] De la part de Benoit 
HediardEnvoyé : lundi 3 juillet 2006 12:36À : 
flexcoders@yahoogroups.comObjet : [flexcoders] Flex 2 Final : 
Error #1009, in RadioButton/get labelPlacement()

Error #1009: Il est 
impossible d'accéder à la propriété ou la méthode d'une référence d'objet 
nul.
(in english, 
something like "it is not possible to access the property or the method of the 
null object reference")
at 
mx.controls::RadioButton/get labelPlacement()
at 
mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::layoutContents()
at 
mx.controls::Button/mx.controls:Button::updateDisplayList()
...
 
In Flex2 final, I'm 
getting this error regularly...
Not tried yet to 
reproduce it on a simple regular case, but it looks like pretty 
random.
I don't use the 
labelPlacement property in our app.
 
I've never 
encountered this error in previous beta, only since the FP9 / Flex2 
Final.
Looks like a very 
annoying low level framework error, related to the layout of 
RadioButtons.

 
Anyone else facing 
this issue?
And found a 
workaround?
 
Benoit 
Hediard 
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