Flex: How to determine if a PopUpManager window is open (or when it has closed)?

In Flex (Flash Builder 4) I am opening a new window via PopUpManager.addPopUp. I have timer code that runs in my component and I need to stop my timer when that window opens and start the timer again when the window closes.

I figure it's easy enough to stop the timer in the function that opens the window, but how can I start the timer again when the window closes?

Is there a way to tell if there is a pop-up window in front of my component, or if a specific po开发者_开发技巧p-up window is still open via PopUpManager?

Maybe events are a better approach?

Thanks!

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Events! is the way to go. Fire events during launch/close. Add your logic in the event Handlers!

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You can use following code to check whether opened popup window is getting closed or not. if it is closed you can stop the timer.

  //set the flag to find your popup window is exist or not.
  private var isPopupExist:Boolean = false;

  private function closePopUpWindow():void
  {

   var systemManager:SystemManager = FlexGlobals.topLevelApplication.systemManager;
   //Returns a list of all children.
   var childList:IChildList = systemManager.rawChildren;
   for(var i:int=childList.numChildren-1;i>=0;i--)
   {
      var childObject:* = childList.getChildAt(i);
      //If child object is Uicomponent.
      if (childObject is UIComponent)
      {
      var uiComponent:UIComponent = childObject as UIComponent;
      //If uicomponent is popup and class name is equal to **your popup component name** here i am using "ChatComp".

          if (uiComponent.isPopUp && uiComponent.className == "ChatComp")
          { 
                  isPopupExist = true;
          }
      }
   } 
}

in your Timer,

  private function checkPopUpExistance():void
  {
     call closePopUpWindow() function for every 1 sec or any seconds(your wish) to check whether popup is exist or not.
     if(isPopupExist)
     {
       here you stop the timer.
     }
 }

Now you can start the Timer, when you opened the Popup window.

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The popupmanager is a singleton class, so you can easily know how many popups have been created with his ChildList

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/managers/PopUpManagerChildList.html