Extending PopUpButton and using it in a Flex 4 web application - apache-flex

Question

In my Flex 4.6 web application I use mainly spark components, but there is also an mx-component - a PopUpButton extended by me (the source code is below).
Users report problems with that button, but I can't reproduce any - since weeks.
I've tried replacing mx:Menu attached to it by a s:List but it hasn't changed anything. I suspect there is a "null pointer exception" or some other failure, that I don't hit when testing myself...
My question is: why does Flash Builder reports warning about my custom button as if its methods would be private or not present?
Can anybody please spot the reason?
My main App.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:Application
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:comps="*">
<fx:Script>
<![CDATA[
_auxBtn.update(obj.aux);
......
_auxBtn.disable();
]]>
</fx:Script>
<comps:AuxButton id="_auxBtn" enabled.normal="false" enabled.ingame="false" aux="handleAux(event)" />
My custom button AuxButton.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:PopUpButton
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
popUp="{_list}"
initialize="init(event)">
<fx:Metadata>
[Event(name="aux", type="PrefEvent")]
</fx:Metadata>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;
import mx.utils.ObjectUtil;
import spark.components.List;
private const EXACT:String = 'Своя игра';
private const REVEAL:String = 'Показать';
private var _str:String;
[Bindable]
private var _data:ArrayCollection = new ArrayCollection();
[Bindable]
private var _list:List = new List();
private function init(event:FlexEvent):void {
_list.dataProvider = _data;
_list.addEventListener('click', handleList);
addEventListener('click', handleClick);
}
public function update(aux:Array):void {
var found:Boolean;
// nothing has changed
if (ObjectUtil.compare(_data.source, aux, 0) == 0)
return;
if (aux == null || aux.length == 0) {
disable();
return;
}
_data.removeAll();
for each (var obj:Object in aux) {
_data.addItem(obj);
if (!_str) {
if (EXACT == obj['label']) {
_str = obj['event'];
label = obj['label'];
found = true;
} else if (REVEAL == obj['label']) {
_str = obj['event'];
label = obj['label'];
found = true;
}
} else if (_str == obj['event']) {
found = true;
}
}
if (!found) {
_str = _data[0].event;
label = _data[0].label;
}
enabled = true;
}
private function handleList(event:MouseEvent):void {
var index:int = _list.selectedIndex;
if (index >= 0 && index < _data.length) {
_str = _data[index].event;
label = _data[index].label;
}
close();
}
private function handleClick(event:MouseEvent):void {
dispatchEvent(new PrefEvent(PrefEvent.AUX, _str));
disable();
}
public function disable():void {
_data.removeAll();
enabled = false;
_str = null;
label = '';
}
]]>
</fx:Script>
</mx:PopUpButton>

Answer 1

Don't worry about Flash Builder warnings, sometimes it has difficulties analyzing custom mx extended code (even spark sometimes!).
If it runs it's okay, warnings will eventually go away after a clean or a FB restart.
You can also try to reproduce same feature using a mix of spark component, depending on a feature, it is maybe the best thing to do.
Stay assured, I pasted your code in my Flash Builder (and removed the PrefEvent), there are no warnings at all on my computer :)
For the error you users are reporting, you should give us more detail so we can try to help.
Cheers