001/* 002 * This library is part of OpenCms - 003 * the Open Source Content Management System 004 * 005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com) 006 * 007 * This library is free software; you can redistribute it and/or 008 * modify it under the terms of the GNU Lesser General Public 009 * License as published by the Free Software Foundation; either 010 * version 2.1 of the License, or (at your option) any later version. 011 * 012 * This library is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * For further information about Alkacon Software, please see the 018 * company website: http://www.alkacon.com 019 * 020 * For further information about OpenCms, please see the 021 * project website: http://www.opencms.org 022 * 023 * You should have received a copy of the GNU Lesser General Public 024 * License along with this library; if not, write to the Free Software 025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 026 */ 027 028package org.opencms.gwt.client.ui.history; 029 030import com.google.common.base.Predicate; 031import com.google.gwt.cell.client.ActionCell; 032import com.google.gwt.safehtml.shared.SafeHtmlBuilder; 033 034/** 035 * Cell class for rendering a button inside a cell table.<p> 036 * 037 * @param <T> the cell type 038 */ 039public class CmsButtonCell<T> extends ActionCell<T> { 040 041 /** Function to check whether the button should be available. */ 042 private Predicate<T> m_checkActive; 043 044 /** The value for the CSS class of the button. */ 045 private String m_cssClass; 046 047 /** The value for the title attribute of the button. */ 048 private String m_title; 049 050 /** 051 * Creates a new instance.<p> 052 * 053 * @param title the value for the title attribute of the button 054 * @param cssClass the value for the CSS class of the button 055 * @param delegate the delegate which should be called when the button is clicked 056 * @param checkActive a predicate to check whether the button should be active 057 */ 058 public CmsButtonCell( 059 String title, 060 String cssClass, 061 final ActionCell.Delegate<T> delegate, 062 final Predicate<T> checkActive) { 063 064 super("", new ActionCell.Delegate<T>() { 065 066 public void execute(T object) { 067 068 if (checkActive.apply(object)) { 069 delegate.execute(object); 070 } 071 } 072 }); 073 m_title = title; 074 m_cssClass = cssClass; 075 m_checkActive = checkActive; 076 } 077 078 /** 079 * @see com.google.gwt.cell.client.ActionCell#render(com.google.gwt.cell.client.Cell.Context, java.lang.Object, com.google.gwt.safehtml.shared.SafeHtmlBuilder) 080 */ 081 @Override 082 public void render(com.google.gwt.cell.client.Cell.Context context, T value, SafeHtmlBuilder sb) { 083 084 if (m_checkActive.apply(value)) { 085 sb.append(CmsResourceHistoryTable.templates.button(m_title, m_cssClass)); 086 } 087 } 088}