/**
* {@inheritDoc}
*/
public boolean isInState(JComponent c) {
if (c != null && c.getParent() != null) {
SeaGlassScrollBarUI ui = (SeaGlassScrollBarUI) ((JScrollBar) c.getParent()).getUI();
if (ui.getIncreaseButton() == c) {
return true;
}
}
return false;