Quick solution:
At the bottom of function setEffects() in ResizableTitleWindow.as, change this line:
currentState = “normal”;
to this:
setCurrentState(“normal”, false);

Explanation:
The property setter for currentState calls setCurrentState with the second parameter set to ‘true’, meaning ‘play transition when changing states’. During the process of running PopUpManager.centerPopUp(), the setEffects() function is called, and thus setCurrentState is called, with the instruction to play the transition.
centerPopUp() then triggers a validation cycle. As part of the validation cycle, the transition effects are triggered. This includes a ‘Move’ effect, and the destination of the move is (0,0): the default and then-current position of the window, as centerPopUp hasn’t yet done its centering measurements.

centerPopUp then goes on to calculate the new position of the window, and sets its coordinates appropriately.

However, the transition that was triggered runs asynchronously, so a few milliseconds later the ‘move’ effect finishes and proceeds to set the coordinates of the window back to (0,0). By the time the window displays, this has been done.

The solution, then, is to tell UIComponent not to play the transition when setting the initial state, by making the change shown above.

Looking at the UIComponent code, I’m guessing this problem might be limited to Flex 4, which is what I’m using.

Is there a version of the code around with the improvements mentioned above ?

Thanks !

Piet

Error #1034: Type Coercion failed: cannot convert _mywebsite_mx_managers_SystemManager@43d80a1 to mx.core.IUIComponent.
at ResizableTitleWindow/createChildren()[C:\depot\flex\components\ResizableTitleWindow\src\ResizableTitleWindow.as:467]
at mx.core::UIComponent/initialize()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as:5262]
at mx.core::Container/initialize()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\Container.as:2524]
at com.mns.boxinbox.client.ui.components.feeds::FeedReaderComponent/initialize()[C:\mns-rep\mns\boxinbox\flex_src\com\mns\boxinbox\client\ui\components\feeds\FeedReaderComponent.mxml:0]
at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::childAdded()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\SystemManager.as:1625]
at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::rawChildren_addChildAt()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\SystemManager.as:1675]
at mx.managers::SystemManager/addChild()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\SystemManager.as:1225]
at mx.managers::PopUpManagerImpl/addPopUp()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\PopUpManagerImpl.as:263]
at mx.managers::PopUpManager$/addPopUp()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\PopUpManager.as:169]

The code I use to show the component is:
var component:MyComponent = new MyComponent();
var parent:DisplayObject = Sprite(Application.application);
if (parent is UIComponent) {
component.moduleFactory = UIComponent(parent).moduleFactory;
}
PopUpManager.addPopUp(component, parent, false);

It seems like is trying to do some conversion but on the system manager. If I use the TitleWindow bundled with flex, it works. Any ideas?

Thanks.