🚀 go-pugleaf

There is a possibility to determine focus without using Swing by using
Component.processFocusEvent.  Create a focusEvent listener for every
component that looks for FOCUS_GAINED and FOCUS_LOST.  When it receives
FOCUS_GAINED, store the reference to the granddaddy container and the
reference to the current object in a vector/hashtable/etc -- preferrable in
globally accessible data storage, e.g. static class variables.  And when
FOCUS_LOST is received, remove the reference from this data storage.  This
means you can now query the data storage to find out what component
currently has the focus.

Franck Rasolo wrote:

> I think this what you're looking for, it's taken from the Swing (1.0.3)
> API documentation :-
>
> Class com.sun.java.swing.SwingUtilities
>
> public static java.awt.Component findFocusOwner(java.awt.Component c)
>
>      Return the child component which has focus, if any. The HotJava
>      SecurityManager forbids applet access to getFocusOwner(), so if the
>      component is an applet, we check whether a JComponent has focus.
>      Non-Swing components in an applet on HotJava are out-of-luck,
>      unfortunately.
>
> > Is there an API that returns either awt.Component or JComponent
> > to indicate it is the component that currently has focus ?
> > Thanks for the info.