I had a similar issue, where the validation/redbox error was being
fired off when i didnt want it to be.
this is the way i see it.
your validator is monitoring combobox.selectedIndex ie
<mx:Model id="validationModel">
<facilityType>{facilityType.selectedIndex}</facilityType>
</mx:Model>
So everytime your selectedIndex changes (like in a modelChanged) you
trigger validation..........Therefore, don't monitor selectedIndex.
You could try the following -
Create an extended combobox with an extra property called 'myIndex'.
And monitor that i.e.
<mx:Model id="validationModel">
<facilityType>{facilityType.myIndex}</facilityType>
</mx:Model>
myIndex would be updated with the selectedIndex value during the
combobox change event.
eg
<mx:ComboBox change="doChange(event)">
<mx:Script>
var __myIndex:Number;
[ChangeEvent("mychanged")]
function get myIndex():Number
{
return __myIndex;
}
function set myIndex(txt:Number):Void
{
__myIndex = txt;
dispatchEvent({type:"myChanged"});
}
function doChange(event){
myIndex = selectedIndex;
}
its a bit long winded but it should give you some ideas.
(and the code is untested).
--- In [email protected], "Tim Dwelle" <[EMAIL PROTECTED]> wrote:
> The prompt property helps simplify things a bit, but doesn't solve
the
> problem.
>
> In fact, it seems to create its own problem. When I use the
prompt in
> conjunction with a combobox using the data provider /
labelField... it now
> highlights the first 2 options (the prompt and the first option
from the
> webservice) whenever item 0 is selected! Works like a champ when
the
> combobox has all string items, though...
>
> Regardless of that cosmetic issue, the real problem is that the
modelChanged
> event (I'm guessing that is the one) seems to also trigger
validation. So
> even though we aren't firing off a change event because we won't
have to set
> the selectedIndex, we are still triggering validation when the
combobox gets
> populated.
>
> That's the bit I'm trying to avoid. I don't want the box to turn
red until
> the user actually makes a selection, or when we call
isSelectionValid(). Any
> ideas?
>
> Thanks again.
>
> -Tim.
>
> >From: "Matt Chotin" <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: <[email protected]>
> >Subject: RE: [flexcoders] bypass the change event
> >Date: Wed, 22 Jun 2005 22:38:28 -0700
> >
> >What if you used the ComboBox prompt property instead and only
set the
> >selectedIndex if you have a real value? It might avoid the
change event
> >firing there too.
> >
> >
> >
> >Matt
> >
> >
> >
> >________________________________
> >
> >From: [email protected]
[mailto:[EMAIL PROTECTED] On
> >Behalf Of dwellet
> >Sent: Wednesday, June 22, 2005 1:43 PM
> >To: [email protected]
> >Subject: [flexcoders] bypass the change event
> >
> >
> >
> >I have this combobox.
> >
> >The combobox is populated by a webservice.
> >
> >When the webservice result arrives, I have a utility function that
> >adds a 'Pick an item...' sort of option at the top of the
dropdown,
> >and then selects the appropriate selected item. If there is no
> >appropriate selected item, it picks index 0 (the dummy 'Pick an
> >item...').
> >
> >I have a validator that validates that the combobox has a real
> >selection.
> >
> >The problem is... I want my utility function to happen
in "stealth"
> >mode. If the user changes the combobox, I want it to be
validated. But
> >if I programatically set the selectedIndex, I don't want any
events to
> >fire and trigger validation.
> >
> >Ironically, I read that in Flex 1.0, changing the selectedIndex
did
> >not fire a change event, but this was "fixed" in 1.5. The old
behavior
> >is precisely what I want. Any way to temporarily bypass that
change
> >event firing?
> >
> >Code included below... Thanks for your help!
> >
> >-Tim.
> >
> >
> >
> >
> >[ComboBoxValidator.as]
> >
> >
> >import mx.controls.*;
> >import mx.validators.*;
> >
> >/* ComboBoxValidator
> >*
> >* Validate that a user does not select the dummy option (eg.
> >* 'Pick a value...') in a required combobox.
> >*
> >*/
> >class ComboBoxValidator extends Validator
> >{
> > public function doValidation(foo:String) : Void
> > {
> > var n = Number(foo);
> > if (n == 0)
> > {
> > validationError("noSelection", "Field is required.",
null);
> > }
> > }
> >}
> >
> >
> >
> >
> >
> >[Test.mxml]
> >
> >
> ><mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml";
> > xmlns:dom="*"
> > creationComplete="start()">
> >
> > <mx:Script>
> > <![CDATA[
> > import mx.controls.*;
> > import mx.containers.*;
> > import mx.managers.*;
> > import mx.validators.*;
> >
> > import com.dom.sampling.vo.*;
> >
> > var model : SampleSite;
> >
> > var PICK_A_FACILITY_TYPE : FacilityType;
> >
> > /* start()
> > *
> > * Perform basic setup.
> > *
> > */
> > function start()
> > {
> > PICK_A_FACILITY_TYPE = new FacilityType();
> > PICK_A_FACILITY_TYPE.name = "Choose a facility
type...";
> > service.getAllFacilityTypes();
> >
> > if (!model)
> > {
> > model = new SampleSite();
> > }
> > }
> >
> > /* prepareCombobox()
> > *
> > * Prepares a combobox by adding a first, descriptive
> > * option (eg. 'Pick a value...') to the dropdown. It
> > * also sets the initial value of the combobox, either
> > * to the item matching the passed in initialValue, or
> > * if no match is found, to the first item in the
> > * combobox.
> > *
> > * @param combobox the combobox to prepare
> > *
> > * @param pickAValue the first, descriptive option
> > * (eg. 'Pick a value...') to add
> > * to the combobox
> > *
> > * @param initialValue the initialValue the combobox
> > * should be set to
> > */
> > public function prepareComboBox(combobox: ComboBox,
> > pickAValue: Object,
> > initialValue: Object) :
Void
> > {
> > if (pickAValue)
> > {
> > combobox.addItemAt(0, pickAValue);
> > combobox.selectedIndex = 0;
> > }
> >
> > if (initialValue)
> > {
> > for (var i=0; i < combobox.length; i++)
> > {
> > var item = combobox.getItemAt(i);
> >
> > // object
> > if (item instanceof Object &&
> > item.id == initialValue.id)
> > {
> > combobox.selectedIndex = i;
> > }
> >
> > // non-object
> > else if (item == initialValue)
> > {
> > combobox.selectedIndex = i;
> > }
> > }
> > }
> > }
> >
> > ]]>
> > </mx:Script>
> >
> > <mx:WebService id="service"
> > wsdl="/sampling-ws/services/LocationService?
wsdl"
> > showBusyCursor="true">
> >
> > <mx:operation name="getAllFacilityTypes"
> > result="prepareComboBox(facilityType,
> >PICK_A_FACILITY_TYPE, model.facilityType)"/>
> >
> > </mx:WebService>
> >
> > <mx:Panel title="Administer Sample Site" width="100%">
> > <mx:FormItem width="100%" required="true" label="Facility
> >Type">
> > <mx:ComboBox id="facilityType"
> >dataProvider="{service.getAllFacilityTypes.result}"
> >labelField="name"/>
> > </mx:FormItem>
> > </mx:Panel>
> >
> > <mx:Model id="validationModel">
> > <facilityType>{facilityType.selectedIndex}</facilityType>
> > </mx:Model>
> >
> > <dom:ComboBoxValidator required="true"
> >field="validationModel.facilityType"/>
> >
> ></mx:Application>
> >
> >
> >
> >
> >
> >________________________________
> >
> >Yahoo! Groups Links
> >
> >* To visit your group on the web, go to:
> > http://groups.yahoo.com/group/flexcoders/
> >
> >* To unsubscribe from this group, send an email to:
> > [EMAIL PROTECTED]
> ><mailto:[EMAIL PROTECTED]
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> >
> >* Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> >Service <http://docs.yahoo.com/info/terms/> .
> >
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