?? columns.java
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/* Columns.java{{IS_NOTE Purpose: Description: History: Tue Oct 25 16:00:29 2005, Created by tomyeh}}IS_NOTECopyright (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.HeadersElement;/** * Defines the columns of a grid. * Each child of a columns element should be a {@link Column} element. * * @author tomyeh */public class Columns extends HeadersElement { //-- Component --// public void setParent(Component parent) { if (parent != null && !(parent instanceof Grid)) throw new UiException("Unsupported parent for columns: "+parent); final boolean changed = getParent() != parent; super.setParent(parent); if (changed && parent != null) ((Grid)parent).initAtClient(); } public boolean insertBefore(Component child, Component insertBefore) { if (!(child instanceof Column)) throw new UiException("Unsupported child for columns: "+child); if (super.insertBefore(child, insertBefore)) { final Component parent = getParent(); if (parent != null) parent.invalidate(); //FUTURE: optimize the invalidation to attributes of //certain cells //It implies initAtClient return true; } return false; } public boolean removeChild(Component child) { if (super.removeChild(child)) { final Component parent = getParent(); if (parent != null) parent.invalidate(); //FUTURE: optimize the invalidation to attributes of //certain cells //It implies initAtClient return true; } return false; }}
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