/**
* @param component component
* @return whether the component in Swing tree or not. This method is more weak then {@link
* Component#isShowing() }
*/
private boolean isInTree(final Component component) {
if (component instanceof Window) {
return component.isShowing();
} else {
Window windowAncestor = SwingUtilities.getWindowAncestor(component);
return windowAncestor != null && windowAncestor.isShowing();
}
}
