How to get active component of other components component usage

Question

Hi all,
let me try to describe you the issue.
I've got three components interacting with another. Lets call them CA, C1 and C2.
CA uses both C1 and C2, so CA has component usages CUA1 and CUA2. But C1 also uses C2 with component usage CU12.
C1 calls an interface method of component usage CU12 (of component C2).
But although I've got an active component on CA-level for CUA1 (lets call this active component ACT1), C1 does not call the interface method of ACT1. (Even events are not triggered.)
How can I assign the active component of CUA1 to C1 at runtime and how do I call its interface method from C1?
Can I search for active components within C1 by name (I've got several active components, how do I differentiate them)?
Thank you for your help.
ismail
FYI: The scenario:
CA uses C1 as a global search component.
CA has several list components C2.1, C2.2 etc.
C2.1 lists all arrival/departure flights from NY. It also offers a minor search functionality for flight regarding NY.
C2.2 lists all arrival/departure flights from LA. It also offers a minor search functionality for flight regarding LA. etc...
I want to use C1 as a global search which uses the minor searches of C2.1, C2.2 etc. The outcome of the minor searches shall be displayed in C1, but also in C2.1, C2.2 etc. when I switch to the C2.1, C2.2 etc.
Example usage 1:
1. At CA I go to C2.1 and search for all flights to NY from London.
2. Then I switch to C2.2 and search for all flights from LA to Berlin.
3. When I switch back to C2.1 the former results remain there, I can still see all flights to NY from London.
Example usage 2:
1. At CA I go to C1 and make a global search for all departures to London.
2. If I now switch to C2.2 I want to see all flights from LA to London, without a search here.
3. If I now switch to C2.1 I want to see all flights from NY to London, without a search here.

Answer 1

You use a desktop pane, but save a reference as a JLayeredPane. So make the reference of type JDesktopPane and check out [the documentation API|http://java.sun.com/javase/6/docs/api/javax/swing/JDesktopPane.html#getSelectedFrame()].
For the next time, bookmark [http://java.sun.com/javase/6/docs/api/] and use you browsers search function to quickly jump to the class you want. Swing component usually also have a link to the relevant tutorial.