[Pharo-users] synchronized return from asynchronous message block

[Peter Uhnak]

Hi,

is it possible to return "synchronously" even if I have an asynchronous message?

For example:

SomeObject>>someMethod
        ^ UIManager default chooseFrom: #(a b c)

When the above method is executed, it will open a popup and block the execution 
until I select something, then it will return the selection.

But if I instead have something like this

SomeObject>>otherMethod
        |choice|
        NewListModel new
                items: #(a b c);
                whenSelectedItemChanged: [ :item | choice := item ];
                        openDialogWithSpec.
                        choice.

Then it will open the window but it will immediately return nil.

So my question is: is it possible to synchronously return even in the second 
example / block the flow until a selection is made?

Thanks,
Peter