I have reduced a problem I'm having to a very simple example. I'm using the
routine in a validation of form, trying to make sure they don't leave the
current tab index if a form is 'open.' It works the first time but after that,
does not work every other time. Suggestions?



<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
private function resetTab():void{
tabNav.selectedIndex = 0;
Alert.show("selected child should be tab1 but it's " +
tabNav.selectedChild);
}
]]>
</mx:Script>
<mx:TabNavigator id="tabNav" x="48" y="35" width="200" height="200"
change="resetTab();">
<mx:Canvas label="Tab 1" width="100%" height="100%" id="tab1">
</mx:Canvas>
<mx:Canvas label="Tab 2" width="100%" height="100%" id="tab2">
</mx:Canvas>
</mx:TabNavigator>
</mx:Application>

Perhaps try adding the following line after setting the selected index:

tabNav.validateNow();

On Jun 3, 1:37 am, "John Hall" <webforumsu...@macromedia.com> wrote:
> I have reduced a problem I'm having to a very simple example. I'm using the
> routine in a validation of form, trying to make sure they don't leave the
> current tab index if a form is 'open.' It works the first time but after that,
> does not work every other time. Suggestions?
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
> <mx:Script>
> <![CDATA[
> import mx.controls.Alert;
> private function resetTab():void{
> tabNav.selectedIndex= 0;
> Alert.show("selected child should be tab1 but it's " +
> tabNav.selectedChild);
> }
> ]]>
> </mx:Script>
> <mx:TabNavigatorid="tabNav" x="48" y="35" width="200" height="200"
> change="resetTab();">
> <mx:Canvas label="Tab 1" width="100%" height="100%" id="tab1">
> </mx:Canvas>
> <mx:Canvas label="Tab 2" width="100%" height="100%" id="tab2">
> </mx:Canvas>
> </mx:TabNavigator>
> </mx:Application>

I'm having the same issue and have yet to find a solution. It is
slightly comforting to see that I'm not alone in my frustration.

me having same problems just wasted 5 hours yesterday on this issue.........use
the validateProperties()..........the logic behind it might be that tabNaigator
object has a property selectedIndex which is forcefully committed by this
function

Try using the callLater method.

Instead of tabNav.selectedIndex = 0;

tabNav.callLater(setTab);

then

private function setTab():void{
tabNav.selectedIndex = 0;
}

Doug

I ran into a similar problem where the correct tab was not always being
selected when the ViewStack selectedIndex changed. This is a bug in Flex, which
I have reported and submitted a patch for.

In the meantime, you can use the attached Custom Class, and this should fix
your problem....

package
{

//--------------------------------------------------------------------------
//
// Import all necessary classes
//

//--------------------------------------------------------------------------

//----------------------------------
// Import necessary non-core Flex classes
//----------------------------------

import mx.containers.TabNavigator;

public class CustomTabNavigator extends TabNavigator
{

//--------------------------------------------------------------------------
//
// Methods
//

//--------------------------------------------------------------------------

// Constructor
public function CustomTabNavigator()
{
super();
}

override protected function commitSelectedIndex(newIndex:int):void
{
super.commitSelectedIndex(newIndex);

// Select the corresponding Tab in the Tab Bar (this fixes a bug
in Flex)
tabBar.selectedIndex = newIndex;
}
}
}