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; 029 030import org.opencms.gwt.client.CmsCoreProvider; 031import org.opencms.gwt.client.Messages; 032import org.opencms.gwt.client.ui.contextmenu.CmsContextMenu; 033import org.opencms.gwt.client.ui.contextmenu.CmsContextMenuCloseHandler; 034import org.opencms.gwt.client.ui.contextmenu.I_CmsContextMenuEntry; 035import org.opencms.gwt.client.ui.css.I_CmsLayoutBundle; 036import org.opencms.gwt.client.ui.input.CmsLabel; 037import org.opencms.gwt.client.util.CmsClientCollectionUtil; 038import org.opencms.gwt.shared.CmsCoreData.AdeContext; 039 040import java.util.List; 041 042import com.google.gwt.event.logical.shared.CloseEvent; 043import com.google.gwt.event.logical.shared.CloseHandler; 044import com.google.gwt.event.shared.HandlerRegistration; 045import com.google.gwt.user.client.Window; 046import com.google.gwt.user.client.ui.FlexTable; 047import com.google.gwt.user.client.ui.PopupPanel; 048 049/** 050 * The context tool-bar menu button.<p> 051 * 052 * @since 8.0.0 053 */ 054public class CmsToolbarContextButton extends A_CmsToolbarMenu<I_CmsToolbarHandler> { 055 056 /** The menu data. */ 057 protected List<I_CmsContextMenuEntry> m_menuEntries; 058 059 /** The loading panel. */ 060 private CmsLoadingAnimation m_loadingPanel; 061 062 /** The context menu. */ 063 private CmsContextMenu m_menu; 064 065 /** The registration for the first close handler. */ 066 private HandlerRegistration m_menuCloseHandler; 067 068 /** Context used for loading the context menu entries. */ 069 private AdeContext m_menuContext = AdeContext.pageeditor; 070 071 /** The main content widget. */ 072 private FlexTable m_menuPanel; 073 074 /** The label which is displayed when no entries are found. */ 075 private CmsLabel m_noEntriesLabel; 076 077 /** The registration for the second close handler. */ 078 private HandlerRegistration m_popupCloseHandler; 079 080 /** 081 * Constructor.<p> 082 * 083 * @param handler the container-page handler 084 */ 085 public CmsToolbarContextButton(final I_CmsToolbarHandler handler) { 086 087 super(I_CmsButton.ButtonData.CONTEXT, handler); 088 m_noEntriesLabel = new CmsLabel(Messages.get().key(Messages.GUI_TOOLBAR_CONTEXT_EMPTY_0)); 089 m_noEntriesLabel.addStyleName(I_CmsLayoutBundle.INSTANCE.contextmenuCss().menuInfoLabel()); 090 m_noEntriesLabel.addStyleName(I_CmsLayoutBundle.INSTANCE.generalCss().buttonCornerAll()); 091 m_loadingPanel = new CmsLoadingAnimation(); 092 // create the menu panel (it's a table because of ie6) 093 m_menuPanel = new FlexTable(); 094 // set a style name for the menu table 095 m_menuPanel.getElement().addClassName(I_CmsLayoutBundle.INSTANCE.contextmenuCss().menuPanel()); 096 097 // set the widget 098 setMenuWidget(m_menuPanel); 099 100 // clear the width of the popup content 101 getPopup().setWidth(0); 102 getPopup().addStyleName(I_CmsLayoutBundle.INSTANCE.dialogCss().contextMenu()); 103 } 104 105 /** 106 * @see org.opencms.gwt.client.ui.I_CmsToolbarButton#onToolbarActivate() 107 */ 108 public void onToolbarActivate() { 109 110 getHandler().loadContextMenu(CmsCoreProvider.get().getStructureId(), m_menuContext); 111 } 112 113 /** 114 * Unregister the resize handler.<p> 115 * 116 * @see org.opencms.gwt.client.ui.I_CmsToolbarButton#onToolbarDeactivate() 117 */ 118 public void onToolbarDeactivate() { 119 120 if (m_resizeRegistration != null) { 121 m_resizeRegistration.removeHandler(); 122 m_resizeRegistration = null; 123 } 124 } 125 126 /** 127 * @see org.opencms.gwt.client.ui.CmsMenuButton#openMenu() 128 */ 129 @Override 130 public void openMenu() { 131 132 if (m_menu == null) { 133 m_menuPanel.setWidget(0, 0, m_loadingPanel); 134 } 135 super.openMenu(); 136 137 } 138 139 /** 140 * Sets the menu context.<p> 141 * 142 * @param menuContext the new menu context 143 */ 144 public void setMenuContext(AdeContext menuContext) { 145 146 m_menuContext = menuContext; 147 } 148 149 /** 150 * Creates the menu and adds it to the panel.<p> 151 * 152 * @param menuEntries the menu entries 153 */ 154 public void showMenu(List<I_CmsContextMenuEntry> menuEntries) { 155 156 if (!CmsClientCollectionUtil.isEmptyOrNull(menuEntries)) { 157 // if there were entries found for the menu, create the menu 158 m_menu = new CmsContextMenu(menuEntries, true, getPopup()); 159 // add the resize handler for the menu 160 m_resizeRegistration = Window.addResizeHandler(m_menu); 161 // set the menu as widget for the panel 162 m_menuPanel.setWidget(0, 0, m_menu); 163 if (m_menuCloseHandler != null) { 164 m_menuCloseHandler.removeHandler(); 165 } 166 if (m_popupCloseHandler != null) { 167 m_popupCloseHandler.removeHandler(); 168 } 169 // add the close handler for the menu 170 m_menuCloseHandler = getPopup().addCloseHandler(new CmsContextMenuCloseHandler(m_menu)); 171 m_popupCloseHandler = getPopup().addCloseHandler(new CloseHandler<PopupPanel>() { 172 173 public void onClose(CloseEvent<PopupPanel> event) { 174 175 setActive(false); 176 } 177 }); 178 m_popup.positionDeferred(); 179 } else { 180 m_menuPanel.setWidget(0, 0, m_noEntriesLabel); 181 m_popup.positionDeferred(); 182 } 183 } 184}