Determining If a Focus Lost Is Temporary or Permanent
A temporary focus-lost event occurs if the focus moves
to another window. It's temporary because the component
will gain the focus when its window becomes active again.
A permanent focus-lost event occurs if the focus moves to
another component in the same window.
An example where this distinction might come in handy is in
text field validation; a text field might not validate its contents in
the case of a temporary loss of focus.
component.addFocusListener(new MyFocusListener());
public class MyFocusListener extends FocusAdapter {
public void focusGained(FocusEvent evt) {
// The component gained the focus.
}
public void focusLost(FocusEvent evt) {
// The component lost the focus.
boolean isTemporary = evt.isTemporary();
}
}
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