Cut paste Menu Commands

[Matt S]

I have searched through various places but can't seem to find a
solution to what should be a simple problem.

I am trying to implement cut / paste / select all commands in a JMenu.
(JDK 1.5)

I have a JFrame with JInternal Frames.

When I try to work out which text component has the focus I get null as
the JMenu now has the focus.

i.e

((JTextComponent)scrollableDesktop.getSelectedFrame().getFocusOwner()).cut();

always throws null pointer exception.

This means I don't know which component to copy cut from or paste to.
There must be a solution to this isn't there?

 

[Matt S]

this did the trick

KeyboardFocusManager focusManager =
KeyboardFocusManager.getCurrentKeyboardFocusManager();
focusManager.addPropertyChangeListener(
new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent e) {
String prop = e.getPropertyName();
if (("focusOwner".equals(prop)) &&
(e.getNewValue() != null) &&
((e.getNewValue()) instanceof JTextComponent))
{
last = (JTextComponent)e.getNewValue();
}
}
}
);

store the last JTextComponent that had the focus!