RepositoryComboSupport.java 文件源码

@Override
public void hierarchyChanged(HierarchyEvent e) {
    if ((e.getChangeFlags() & DISPLAYABILITY_CHANGED) == 0) {
        return;
    }

    assert e.getChanged() == triggerComponent;

    if (triggerComponent.isDisplayable()) {
        LOG.finer("trigger component became displayable");      //NOI18N
        RepositoryComboSupport.this.start();
    } else {
        LOG.finer("trigger component became non-displayable");  //NOI18N
        RepositoryComboSupport.this.shutdown();
    }
}