Re: [flexcoders] Question on Flex Script Execution + Alert.show

[Angelo Anolin]

But I need to use the evt parameter in the testFunction, depending on what the 
user has selected in the alert.show function.

How would I reference the same from the alertHandler?

I need your help. I think my understanding of the code execution in Flex is 
different from the norm.

By the way, here's a quick example:


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"layout="vertical"; 
creationComplete="creationCompleteHandler();">
    <mx:Script>
        <![CDATA[
        import mx.controls.Alert;
        import mx.events.DragEvent;
        import mx.events.CloseEvent;
        
        private var _alertVal:int;
        
                private function creationCompleteHandler():void 
                {
                    srclist.dataProvider = ['Angel', 'Bart', 'Calvin', 'Dante', 
'Erich', 'Fox', 'Gale', 'Helen'];        
                    destlist.dataProvider = [];
                }
                
                private function destlist_dragDropHandler(evt:DragEvent):void
                {
                    _alertVal = 0;
                    Alert.show('Proceed', 'Title', Alert.YES | Alert.NO, null, 
handleAlert, null, Alert.YES);
                    
                    if(_alertVal == -1)
                    {
                        evt.preventDefault();
                        // but the above is not triggered since the code jumps 
already to the next line!!!

                    }
                    Alert.show(String(_alertVal), 'This Should Be Triggered 
After the Alert!!');
                }
                
                private function handleAlert(evt:CloseEvent):void 
                {
                    if (evt.detail == Alert.YES)
                    {
                        _alertVal = 1;
                    }
                    else
                    {
                        _alertVal = -1;
                    }
                }
        ]]>
    </mx:Script>
    
    <mx:Panel title="Select Names" layout="horizontal">
        <mx:VBox width="50%">
            <mx:Label text="Names"/>
            <mx:List 
                id="srclist" width="100%" height="400" 
                allowMultipleSelection="false"                
                dragEnabled="true"
                
            />
        </mx:VBox>
        <mx:VBox width="50%">
            <mx:Label text="People Selected"/>
            <!-- Drop target -->
            <mx:List  
                id="destlist" width="100%" height="400" 
                dropEnabled="true"
                dragDrop="destlist_dragDropHandler(event)"
            />
        </mx:VBox>
    </mx:Panel>
</mx:Application>

Thanks and regards,

Angelo





________________________________
From: Beau Scott <beau.sc...@gmail.com>
To: flexcoders@yahoogroups.com
Sent: Thursday, 27 August, 2009 0:32:02
Subject: Re: [flexcoders] Question on Flex Script Execution + Alert.show

  
Alert.show is async, so move the code after Alert.show to the alertHandler 
method after your if/else block that's already in there.

Beau




On Wed, Aug 26, 2009 at 12:03 AM, Angelo Anolin <angelo_anolin@ yahoo.com> 
wrote:

  >
>Hi FlexCoders,
>
>This has puzzled me a bit..
>
>I have the following scripts in my application:
>
>private var myAlert:int;
>
>private function testFunction( evt:Event) :void
>{
>  Alert.show('do you want to proceed', 'Title', Alert.YES | Alert.NO, null, 
> alertHandler, null, Alert.YES);
>
>>  if(myAlert == 1)
>  {
>    // Do Something here
>  }
>  else
>  {
>    // Do other thing here
>  }
>}
>
>Private function alertHandler( evt:CloseEvent)
>{
>  if(evt.Detail == Alert.YES)
>  {
>>    myAlert = 1;
>  }
>  else
>  {
>    myAlert = -1;
>  }
>}
>
>Now, what puzzles me is that the script after the
> Alert.show is triggered, the scripts following it are also triggered.
>
>Is there a way to ensure that the script following the Alert.show alert box 
>would only be executed after the Yes or No buttons has been pressed?
>
>I won't be able to move the scripts after the Alert.show script to the 
>alertHandler event since there are some objects being set / modified prior to 
>the alert being called.
>
>Inputs highly appreciated.
>
>>Thanks.
>
>
>


-- 
Beau D. Scott
Software Engineer