I extend comboBox and raise a custom event when the data provider changes, something like the code below, Then listen for that event and set the selected index according to my needs (I needed to do some calculations to get that, in my own situation). hth, Jim.
[Event(name="dataProviderChanged", type="flash.events.Event")]
public class ExtendedComboBox extends ComboBox
{
public function ExtendedComboBox()
{
super();
}
override protected function collectionChangeHandler(event:Event):void
{
super.collectionChangeHandler(event);
var event:Event = new Event("dataProviderChanged");
this.dispatchEvent(event);
}
}
-----Original Message-----
From: flexcoders@yahoogroups.com on behalf of gur_sukh
Sent: Wed 06/02/2008 18:33
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Setting combobox selectedindex
yes tried that too, but when dataprovider is set the selectedIndex
gets reset to 0 and hence the value.
--- In flexcoders@yahoogroups.com, "Battershall, Jeff"
<[EMAIL PROTECTED]> wrote:
>
> The way I accomlished this was by sub-classing ComboBox, to take a value
> as a parameter and set the selectedIndex accordingly. Ben Forta has an
> example of this somewhere on his website.
>
> Jeff
>
> -----Original Message-----
> From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
> Behalf Of gur_sukh
> Sent: Wednesday, February 06, 2008 1:02 PM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] Re: Setting combobox selectedindex
>
>
> No this is not the scenario i want to have initially a value selected
> when the combobox is shown.
>
>
> --- In flexcoders@yahoogroups.com, Scott Melby <smelby@> wrote:
> >
> > It seems you are asking how to change your code so that your combo box
> > selectedIndex property gets updated each time your model changes. For
>
> > demo purposes you could just do something like the following:
> >
> > /**
> > * Returns the index of the
> > */
> > private function
> getSelectedProductSubTypeIndex(selectedProduct:Product):int
> > {
> > //TODO: in real system search the selectedProduct for the correct
> > sub type and return correct index
> > //the thing to search for could be passed as a param as well
> > return 1;
> > }
> >
> > <mx:ComboBox id="productSubTypeCB" width="160"
> >
> > dataProvider="{selectedProduct.typeNames}"
> > selectedIndex="{this.getSelectedProductSubTypeIndex(selectedProduct)}"
> > change="productOffer.productSubType = event.currentTarget.value" />
> >
> >
> > Assuming your productType member is Bindable this method will get
> > triggered (due to it having a parameter that is bindable) every time
> an
> > assignment is made to productType (like your model changes), since it
> > always returns 1 your selected index will be set for you.
> >
> > hth
> > Scott
> >
> > Scott Melby
> > Founder, Fast Lane Software LLC
> > http://www.fastlanesw.com
> >
> >
> >
> > gur_sukh wrote:
> > >
> > >
> > > The combobox dataprovider sets selectedindex to 0. How do we set it
> > > to something else.
> > >
> > > AS the dataprovider is bound to model and every time it changes the
> > > selected index is 0.
> > >
> > > For demo purposed i need to set this to 1.
> > >
> > > <mx:ComboBox id="productSubTypeCB" width="160"
> > > dataProvider="{selectedProduct.typeNames}"
> > > selectedItem="1"
> > > change="productOffer.productSubType = event.currentTarget.value" />
> > >
> > >
> >
>
>
>
>
> --
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