private boolean accept(Component aComponent) {
if (!(aComponent.isVisible()
&& aComponent.isDisplayable()
&& aComponent.isFocusable()
&& aComponent.isEnabled())) {
return false;
}
// Verify that the Component is recursively enabled. Disabling a
// heavyweight Container disables its children, whereas disabling
// a lightweight Container does not.
if (!(aComponent instanceof Window)) {
for (Container enableTest = aComponent.getParent();
enableTest != null;
enableTest = enableTest.getParent()) {
if (!(enableTest.isEnabled() || enableTest.isLightweight())) {
return false;
}
if (enableTest instanceof Window) {
break;
}
}
}
return true;
}
@Nullable
private static Container getContainer(@Nullable final Component focusOwner) {
if (focusOwner == null) return null;
if (focusOwner.isLightweight()) {
Container container = focusOwner.getParent();
while (container != null) {
final Container parent = container.getParent();
if (parent instanceof JLayeredPane) break;
if (parent != null && parent.isLightweight()) {
container = parent;
} else {
break;
}
}
return container;
}
return SwingUtilities.windowForComponent(focusOwner);
}
