DefaultTabbedContainerUI.java 文件源码

public void hierarchyChanged(HierarchyEvent e) {
    if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0) {
        boolean showing = container.isShowing();
        if (showing != bug4924561knownShowing) {
            if (container.isShowing()) {
                initDisplayer();
                attachModelAndSelectionListeners();
                ensureSelectedComponentIsShowing();
                if (container.getType() == TabbedContainer.TYPE_SLIDING) {
                    updateOrientation();
                }
            } else {
                detachModelAndSelectionListeners();
                if (container.getType() == TabbedContainer.TYPE_SLIDING) {
                    updateOrientation();
                }
            }
        }
        bug4924561knownShowing = showing;
    }
}