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display popup at a specific location

hi guys
I have a situation where i am displaying a popup when user clicks on a button. My requirment is the pop-up window should pop-up right above the button. I can give x and y coordinates but that might not be the best way to do it since if the monitor size changes the x and y coordinates
change. Any idea how i can resolve this?

right now this is my code

when button is clicked i am calling this function

private function launchPopUp(e:MouseEvent):void {
var popupwindow : Window = new Window();                           
PopUpManager.centerPopUp(popupwindow); //this needs to be removed because i dont want pop-up to be in center, instead i want it to display right above the button which is clicked.

and this is my  Window.mxml

<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical" width="286" height="292"
title="bla" horizontalAlign="center"
close="closeWindow(event);"  verticalAlign="top"
x, y      > -- dont want to give x and y coordinates

import com.ms.ewq.entity.project.ProjectDetailDTO;
import mx.core.IFlexDisplayObject;
import mx.events.CloseEvent;
import mx.managers.PopUpManager;
import mx.collections.ArrayCollection;      
private function closeWindow(e:CloseEvent):void {
PopUpManager.removePopUp(e.target as IFlexDisplayObject);
 <mx:label text="data"/>  --show this in the pop-up

any help appreciated
1 Solution
zzynxSoftware engineerCommented:
Out of my head; try this:

private function launchPopUp(e:MouseEvent):void {
    var popupwindow : Window = new Window();                          

    var pt:Point = new Point(e.localX, e.localY);
    pt = e.target.localToGlobal(pt);
    popupwindow.x = pt.x - 286; // 286 = popupwindow.width;
    popupwindow.y = pt.y;

zzynxSoftware engineerCommented:
Some explanation to that code:

1. You take the coordinates of the point where the user clicked the button
2. You convert those local coordinates to global (cf. http://livedocs.adobe.com/flex/3/html/help.html?content=containers_intro_5.html)
3. You use those global ones to position your popup window

You can get the x,y coordinates dynamically from mouse click event and use that for popup..

function whileClick(event:MouseEvent):void
    //use event.localX , event.localY

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zzynxSoftware engineerCommented:
sunsonmahesh, please don't repeat what I already said...
royjaydAuthor Commented:

thanks , that works. One more question i had was when button is clicked the pop-up window shows up but the background fades. how can i avoid that?

zzynxSoftware engineerCommented:
>> the background fades
That's normal Flex behaviour. It indicates it is a model pop up window.

>> how can i avoid that?
Always think twice before changing standard behaviour. It could confuse the user who is used to such UI conventions.
Why would you want to avoid that?
zzynxSoftware engineerCommented:
But if - after having thought twice - you still want to avoid it, I think here's the answer:
The third parameter to addPopup or createPopup controls modality. Per default you create non-modal dialogs (modal = false) ... if you set this to true you completely get rid of the gray background and can continue to access the background (If you are vreating something like Property views).
royjaydAuthor Commented:
Yeah, it actually does make sense, i dont want to avoid it.
Any help with my next question will be greatly appreciated.
royjaydAuthor Commented:
oops, ChristoferDutz , just saw your solution. thanks.
zzynxSoftware engineerCommented:
Thanx 4 axxepting

>> It indicates it is a model pop up window.
in my comment should of course have been:

It indicates it is a modAl pop up window.

>> if you set this to true you completely get rid of the gray background
Setting the 3rd parameter to true is creating a modal pop up, so I don't think the above is right

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