tabs.java

非常接近C/S操作方式的Java Ajax框架－ZK 用ZK框架使你的B/S应用程序更漂亮更易操作。 官网：www.zkoss.org

/* Tabs.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Tue Jul 12 10:43:14     2005, Created by tomyeh
}}IS_NOTE

Copyright (C) 2005 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
	This program is distributed under GPL Version 2.0 in the hope that
	it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.zul;

import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.UiException;

import org.zkoss.zul.impl.XulElement;

/**
 * A collection of tabs ({@link Tab}).
 *
 * @author tomyeh
 */
public class Tabs extends XulElement {
	/** Returns the tabbox owns this component.
	 */
	public Tabbox getTabbox() {
		return (Tabbox)getParent();
	}

	//-- Component --//
	public void setParent(Component parent) {
		if (parent != null && !(parent instanceof Tabbox))
			throw new UiException("Wrong parent: "+parent);

		final Tabbox oldp = (Tabbox)getParent();
		super.setParent(parent);

		invalidateIfAccordion(oldp);
		invalidateIfAccordion((Tabbox)parent);
	}
	public boolean insertBefore(Component child, Component insertBefore) {
		if (!(child instanceof Tab))
			throw new UiException("Unsupported child for tabs: "+child);

		final boolean empty = getChildren().isEmpty();
		final Tab newtab = (Tab)child;
		if (!empty && newtab.isSelected()) newtab.setSelectedDirectly(false);

		if (super.insertBefore(child, insertBefore)) {
			final Tabbox tabbox = getTabbox();

			if (empty && tabbox != null)
				tabbox.setSelectedTab(newtab);

			invalidateIfAccordion(tabbox);
			return true;
		}
		return false;
	}
	public void onChildRemoved(Component child) {
		super.onChildRemoved(child);

		final Tabbox tabbox = getTabbox();
		if (tabbox == null || !tabbox.inAccordionMold())
			smartUpdate("z.init", true); //fixWidth
	}
	public void onChildAdded(Component child) {
		super.onChildAdded(child);

		final Tabbox tabbox = getTabbox();
		if (tabbox == null || !tabbox.inAccordionMold())
			smartUpdate("z.init", true); //fixWidth
	}
		
	/** Invalidates the tabbox if it is accordion.
	 */
	private static void invalidateIfAccordion(Tabbox tabbox) {
		if (tabbox != null && tabbox.inAccordionMold())
			tabbox.invalidate();
	}
}