Java tutorial
/* * GWT-Ext Widget Library * Copyright 2007 - 2008, GWT-Ext LLC., and individual contributors as indicated * by the @authors tag. See the copyright.txt in the distribution for a * full listing of individual contributors. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 3 of * the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package com.gwtext.sample.showcase2.client; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.History; import com.google.gwt.user.client.HistoryListener; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.Element; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.PopupPanel; import com.google.gwt.user.client.ui.RootPanel; import com.gwtext.client.core.*; import com.gwtext.client.widgets.*; import com.gwtext.client.widgets.event.PanelListenerAdapter; import com.gwtext.client.widgets.event.TabPanelListenerAdapter; import com.gwtext.client.widgets.event.ButtonListenerAdapter; import com.gwtext.client.widgets.event.DataViewListenerAdapter; import com.gwtext.client.widgets.layout.*; import com.gwtext.client.widgets.menu.BaseItem; import com.gwtext.client.widgets.menu.Item; import com.gwtext.client.widgets.menu.Menu; import com.gwtext.client.widgets.menu.event.BaseItemListenerAdapter; import com.gwtext.client.widgets.tree.TreePanel; import com.gwtext.client.data.*; import com.gwtext.client.util.Format; public class Showcase2 implements EntryPoint, HistoryListener { private static PopupPanel messagePanel = new PopupPanel(true); private TabPanel centerPanel; private ScreenManager screenManager; private Menu menu; public void onModuleLoad() { //create the main panel and assign it a BorderLayout Panel mainPanel = new Panel(); mainPanel.setLayout(new BorderLayout()); BorderLayoutData northLayoutData = new BorderLayoutData(RegionPosition.NORTH); northLayoutData.setSplit(false); BorderLayoutData centerLayoutData = new BorderLayoutData(RegionPosition.CENTER); centerLayoutData.setMargins(new Margins(5, 0, 5, 5)); Panel centerPanelWrappper = new Panel(); centerPanelWrappper.setLayout(new FitLayout()); centerPanelWrappper.setBorder(false); centerPanelWrappper.setBodyBorder(false); centerPanel = new TabPanel(); centerPanel.setBodyBorder(false); centerPanel.setEnableTabScroll(true); centerPanel.setAutoScroll(true); centerPanel.setAutoDestroy(false); centerPanel.setActiveTab(0); //hide the panel when the tab is closed centerPanel.addListener(new TabPanelListenerAdapter() { public boolean doBeforeTabChange(TabPanel source, Panel newPanel, Panel oldPanel) { WindowMgr.hideAll(); return true; } public void onRemove(Container self, Component component) { component.hide(); } public void onContextMenu(TabPanel source, Panel tab, EventObject e) { showMenu(tab, e); } }); centerPanel.setLayoutOnTabChange(true); centerPanel.setTitle("Main Content"); screenManager = new ScreenManager(centerPanel); //setup the west regions layout properties BorderLayoutData westLayoutData = new BorderLayoutData(RegionPosition.WEST); westLayoutData.setMargins(new Margins(5, 5, 0, 5)); westLayoutData.setCMargins(new Margins(5, 5, 5, 5)); westLayoutData.setMinSize(155); westLayoutData.setMaxSize(350); westLayoutData.setSplit(true); //create the west panel and add it to the main panel applying the west region layout properties Panel westPanel = createWestPanel(); mainPanel.add(westPanel, westLayoutData); final Panel introPanel = new Panel(); introPanel.setTitle("GWT-Ext 2.0.6 Showcase"); introPanel.setPaddings(10); introPanel.setLayout(new FitLayout()); final ShowcaseView showcaseView = new ShowcaseView(screenManager); introPanel.add(showcaseView); centerPanel.add(introPanel, centerLayoutData); centerPanelWrappper.add(centerPanel); mainPanel.add(centerPanelWrappper, centerLayoutData); final String initToken = History.getToken(); if (initToken.length() != 0) { mainPanel.addListener(new PanelListenerAdapter() { public void onRender(Component component) { onHistoryChanged(initToken); } }); } Viewport viewport = new Viewport(mainPanel); // Add history listener History.addHistoryListener(this); } private Panel createWestPanel() { Panel westPanel = new Panel(); westPanel.setId("side-nav"); westPanel.setTitle("Showcase Explorer"); westPanel.setLayout(new FitLayout()); westPanel.setWidth(210); westPanel.setCollapsible(true); Toolbar toolbar = new Toolbar(); if (Ext.isFirebug()) { ToolbarButton button = new ToolbarButton(); button.setIconCls("bug-icon"); QuickTipsConfig qtipsConfig = new QuickTipsConfig(); qtipsConfig.setText("Firebug can make the demo run slow."); qtipsConfig.setWidth(100); qtipsConfig.setMaxWidth(100); button.setTooltip(qtipsConfig); button.addListener(new ButtonListenerAdapter() { public void onClick(Button button, EventObject e) { Panel fb = new Panel(); fb.setAutoScroll(true); fb.setAutoLoad("firebug.html"); final Window window = new Window("Firebug"); window.setIconCls("bug-icon"); window.setWidth(550); window.setHeight(260); window.add(fb); window.setCloseAction(Window.CLOSE); window.show(button.getElement()); } }); toolbar.addButton(button); } toolbar.addFill(); toolbar.addItem(new ToolbarTextItem("Select Theme ")); toolbar.addSpacer(); toolbar.addField(new ThemeChanger()); westPanel.setTopToolbar(toolbar); TabPanel tabPanel = new TabPanel(); tabPanel.setActiveTab(0); tabPanel.setDeferredRender(true); tabPanel.setTabPosition(Position.BOTTOM); TreePanel treePanel = screenManager.getTreeNav(); tabPanel.add(treePanel); tabPanel.add(screenManager.getAccordionNav()); westPanel.add(tabPanel); return westPanel; } /** * This method is called whenever the application's history changes. * * @param historyToken the histrory token */ public void onHistoryChanged(String historyToken) { screenManager.showScreen(historyToken); } private void showMenu(final Panel tab, EventObject e) { if (menu == null) { menu = new Menu(); Item close = new Item("Close Tab"); close.setId("close-tab-item"); close.addListener(new BaseItemListenerAdapter() { public void onClick(BaseItem item, EventObject e) { centerPanel.remove(centerPanel.getActiveTab()); } }); menu.addItem(close); Item closeOthers = new Item("Close Other Tabs"); closeOthers.setId("close-others-item"); closeOthers.addListener(new BaseItemListenerAdapter() { public void onClick(BaseItem item, EventObject e) { Component[] items = centerPanel.getItems(); for (int i = 0; i < items.length; i++) { Panel panel = (Panel) items[i]; if (panel.isClosable() && !panel.getId().equals(centerPanel.getActiveTab().getId())) { centerPanel.remove(panel); } } } }); menu.addItem(closeOthers); } BaseItem close = menu.getItem("close-tab-item"); if (!centerPanel.getActiveTab().isClosable()) { close.disable(); } else { close.enable(); } BaseItem closeOthers = menu.getItem("close-others-item"); if (centerPanel.getItems().length == 1) { closeOthers.disable(); } else { closeOthers.enable(); } menu.showAt(e.getXY()); } public static void showMessage(String title, String message) { messagePanel.setPopupPosition(500, 300); messagePanel.setWidget(new HTML(getMessageHtml(title, message))); messagePanel.setWidth("300px"); messagePanel.show(); } private static native String getMessageHtml(String title, String message) /*-{ return ['<div class="msg">', '<div class="x-box-tl"><div class="x-box-tr"><div class="x-box-tc"></div></div></div>', '<div class="x-box-ml"><div class="x-box-mr"><div class="x-box-mc"><h3>', title, '</h3>', message, '</div></div></div>', '<div class="x-box-bl"><div class="x-box-br"><div class="x-box-bc"></div></div></div>', '</div>'].join(''); }-*/; }