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Sections AddRemove Sample for accordion panel (Smart GWT)

/*  * SmartGWT (GWT for SmartClient)  * Copyright 2008 and beyond, Isomorphic Software, Inc.  *  * SmartGWT is free software; you can redistribute it and/or modify it  * under the terms of the GNU Lesser General Public License version 3  * as published by the Free Software Foundation.  SmartGWT is also  * available under typical commercial license terms - see  * http://smartclient.com/license  * 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.  */ package com.smartgwt.sample.showcase.client; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.ui.RootPanel; import com.smartgwt.client.types.VisibilityMode; import com.smartgwt.client.widgets.Canvas; import com.smartgwt.client.widgets.IButton; import com.smartgwt.client.widgets.Img; import com.smartgwt.client.widgets.events.ClickEvent; import com.smartgwt.client.widgets.events.ClickHandler; import com.smartgwt.client.widgets.layout.HLayout; import com.smartgwt.client.widgets.layout.SectionStack; import com.smartgwt.client.widgets.layout.SectionStackSection; import com.smartgwt.client.widgets.layout.VLayout; public class Showcase implements EntryPoint {   public void onModuleLoad() {     RootPanel.get().add(getViewPanel());   }   public Canvas getViewPanel() {     final SectionStack sectionStack = new SectionStack();     sectionStack.setVisibilityMode(VisibilityMode.MULTIPLE);     sectionStack.setWidth(300);     sectionStack.setHeight(350);     sectionStack.setBorder("2px solid #458B00");     SectionStackSection section1 = new SectionStackSection("Blue Pawn");     section1.setExpanded(true);     section1.addItem(new Img("pieces/48/pawn_blue.png", 48, 48));     sectionStack.addSection(section1);     SectionStackSection section2 = new SectionStackSection("Green Cube");     section2.setExpanded(true);     section2.setCanCollapse(false);     section2.addItem(new Img("pieces/48/cube_green.png", 48, 48));     sectionStack.addSection(section2);     SectionStackSection section3 = new SectionStackSection("Blue Cube");     section3.setExpanded(false);     section3.addItem(new Img("pieces/48/cube_blue.png", 48, 48));     sectionStack.addSection(section3);     lastSectionIndex = 2;     IButton addButton = new IButton("Add Section");     addButton.setWidth(150);     addButton.addClickHandler(new ClickHandler() {         public void onClick(ClickEvent event) {             String title = lastSectionIndex % 2 == 0 ? "Yellow Piece" : "Blue Cube";             String iconName = lastSectionIndex % 2 == 0 ? "piece_yellow" : "cube_blue";             SectionStackSection section = new SectionStackSection(title);             section.setExpanded(lastSectionIndex % 2 == 0);             section.addItem(new Img("pieces/48/" + iconName + ".png", 48, 48));             sectionStack.addSection(section);             ++lastSectionIndex;         }     });     IButton removeButton = new IButton("Remove Section");     removeButton.setWidth(150);     removeButton.addClickHandler(new ClickHandler() {         public void onClick(ClickEvent event) {             sectionStack.removeSection(lastSectionIndex);             --lastSectionIndex;         }     });     HLayout layout = new HLayout();     layout.setMembersMargin(20);     layout.addMember(sectionStack);     VLayout buttons = new VLayout();     buttons.setMembersMargin(10);     buttons.addMember(addButton);     buttons.addMember(removeButton);     layout.addMember(buttons);     return layout;   }   int lastSectionIndex; }                  SmartGWT.zip( 9,880 k)