a grid in tabPanel error

I'm using a grid example to show it in my tabPanel. The problem is that i dont get my data store in my grid and it is empty. The code i'm using is

    package com.google.mdlight.shared;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import com.extjs.gxt.ui.client.Style.HorizontalAlignment;
import com.extjs.gxt.ui.client.data.BaseModel;
import com.extjs.gxt.ui.client.data.Ba开发者_StackOverflow中文版sePagingLoader;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.data.PagingLoadResult;
import com.extjs.gxt.ui.client.data.PagingLoader;
import com.extjs.gxt.ui.client.data.PagingModelMemoryProxy;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.grid.ColumnConfig;
import com.extjs.gxt.ui.client.widget.grid.ColumnData;
import com.extjs.gxt.ui.client.widget.grid.ColumnModel;
import com.extjs.gxt.ui.client.widget.grid.Grid;
import com.extjs.gxt.ui.client.widget.grid.GridCellRenderer;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;
import com.extjs.gxt.ui.client.widget.layout.FlowLayout;
import com.extjs.gxt.ui.client.widget.table.NumberCellRenderer;
import com.extjs.gxt.ui.client.widget.toolbar.PagingToolBar;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.RootPanel;

class GridUsers extends LayoutContainer {
  @Override
  protected void onRender(Element parent, int index) {
    super.onRender(parent, index);
    // super.onRender(parent, index);  
        setLayout(new FlowLayout(10));  
         getAriaSupport().setPresentation(true);  
   // setLayout(new FlowLayout(10));

    // add paging support for a local collection of models
    PagingModelMemoryProxy proxy = new PagingModelMemoryProxy(getStocks());

    // loader
    PagingLoader<PagingLoadResult<ModelData>> loader = new BasePagingLoader<PagingLoadResult<ModelData>>(proxy);
    loader.setRemoteSort(true);

    ListStore<Stock> store = new ListStore<Stock>(loader);

    final PagingToolBar toolBar = new PagingToolBar(10);
    toolBar.bind(loader);

    loader.load(0, 10);

    final NumberFormat currency = NumberFormat.getCurrencyFormat();
    final NumberFormat number = NumberFormat.getFormat("0.00");
    final NumberCellRenderer<Grid<Stock>> numberRenderer = new NumberCellRenderer<Grid<Stock>>(currency);

    GridCellRenderer<Stock> change = new GridCellRenderer<Stock>() {
      public String render(Stock model, String property, ColumnData config, int rowIndex, int colIndex,
          ListStore<Stock> store, Grid<Stock> grid) {
        double val = (Double) model.get(property);
        String style = val < 0 ? "red" : "green";
        return "<span style='color:" + style + "'>" + number.format(val) + "</span>";
      }
    };

    GridCellRenderer<Stock> gridNumber = new GridCellRenderer<Stock>() {
      public String render(Stock model, String property, ColumnData config, int rowIndex, int colIndex,
          ListStore<Stock> store, Grid<Stock> grid) {
        return numberRenderer.render(null, property, model.get(property));
      }
    };

    List<ColumnConfig> configs = new ArrayList<ColumnConfig>();

    ColumnConfig column = new ColumnConfig();
    column.setId("name");
    column.setHeader("Company");
    column.setWidth(200);
    configs.add(column);

    column = new ColumnConfig();
    column.setId("symbol");
    column.setHeader("Symbol");
    column.setWidth(100);
    configs.add(column);

    column = new ColumnConfig();
    column.setId("last");
    column.setHeader("Last");
    column.setAlignment(HorizontalAlignment.RIGHT);
    column.setWidth(75);
    column.setRenderer(gridNumber);
    configs.add(column);

    column = new ColumnConfig("change", "Change", 100);
    column.setAlignment(HorizontalAlignment.RIGHT);
    column.setRenderer(change);
    configs.add(column);

    column = new ColumnConfig("date", "Last Updated", 100);
    column.setAlignment(HorizontalAlignment.RIGHT);
    //column.setDateTimeFormat(DateTimeFormat.getShortDateFormat());
    configs.add(column);

    ColumnModel cm = new ColumnModel(configs);


    ContentPanel cp = new ContentPanel();
   // cp.setFrame(true);
    cp.setHeading("Local Paging Grid");
    //cp.setIcon(Resources.ICONS.table());
    cp.setButtonAlign(HorizontalAlignment.CENTER);
    cp.setLayout(new FitLayout());
    cp.setBottomComponent(toolBar);
    cp.setSize(600, 200);

    Grid<Stock> grid = new Grid<Stock>(store, cm);
    grid.setBorders(true);
    grid.setAutoExpandColumn("name");

    cp.add(grid);

    add(cp);
  }
  public static List<Stock> getStocks() {
    List<Stock> stocks = new ArrayList<Stock>();

    stocks.add(new Stock("Apple Inc.", "AAPL", 125.64, 123.43));
    stocks.add(new Stock("Cisco Systems, Inc.", "CSCO", 25.84, 26.3));
    stocks.add(new Stock("Google Inc.", "GOOG", 516.2, 512.6));
    stocks.add(new Stock("Intel Corporation", "INTC", 21.36, 21.53));
    stocks.add(new Stock("Level 3 Communications, Inc.", "LVLT", 5.55, 5.54));
    stocks.add(new Stock("Microsoft Corporation", "MSFT", 29.56, 29.72));
    stocks.add(new Stock("Nokia Corporation (ADR)", "NOK", 27.83, 27.93));
    stocks.add(new Stock("Oracle Corporation", "ORCL", 18.73, 18.98));
    stocks.add(new Stock("Starbucks Corporation", "SBUX", 27.33, 27.36));
    stocks.add(new Stock("Yahoo! Inc.", "YHOO", 26.97, 27.29));
    stocks.add(new Stock("Applied Materials, Inc.", "AMAT", 18.4, 18.66));
    stocks.add(new Stock("Comcast Corporation", "CMCSA", 25.9, 26.4));
    stocks.add(new Stock("Sirius Satellite", "SIRI", 2.77, 2.74));

    stocks.add(new Stock("Tellabs, Inc.", "TLAB", 10.64, 10.75));
    stocks.add(new Stock("eBay Inc.", "EBAY", 30.43, 31.21));
    stocks.add(new Stock("Broadcom Corporation", "BRCM", 30.88, 30.48));
    stocks.add(new Stock("CMGI Inc.", "CMGI", 2.14, 2.13));
    stocks.add(new Stock("Amgen, Inc.", "AMGN", 56.22, 57.02));
    stocks.add(new Stock("Limelight Networks", "LLNW", 23, 22.11));
    stocks.add(new Stock("Amazon.com, Inc.", "AMZN", 72.47, 72.23));

    stocks.add(new Stock("E TRADE Financial Corporation", "ETFC", 24.32, 24.58));
    stocks.add(new Stock("AVANIR Pharmaceuticals", "AVNR", 3.7, 3.52));
    stocks.add(new Stock("Gemstar-TV Guide, Inc.", "GMST", 4.41, 4.55));
    stocks.add(new Stock("Akamai Technologies, Inc.", "AKAM", 43.08, 45.32));
    stocks.add(new Stock("Motorola, Inc.", "MOT", 17.74, 17.69));
    stocks.add(new Stock("Advanced Micro Devices, Inc.", "AMD", 13.77, 13.98));
    stocks.add(new Stock("General Electric Company", "GE", 36.8, 36.91));
    stocks.add(new Stock("Texas Instruments Incorporated", "TXN", 35.02, 35.7));
    stocks.add(new Stock("Qwest Communications", "Q", 9.9, 10.03));
    stocks.add(new Stock("Tyco International Ltd.", "TYC", 33.48, 33.26));
    stocks.add(new Stock("Pfizer Inc.", "PFE", 26.21, 26.19));
    stocks.add(new Stock("Time Warner Inc.", "TWX", 20.3, 20.45));
    stocks.add(new Stock("Sprint Nextel Corporation", "S", 21.85, 21.76));
    stocks.add(new Stock("Bank of America Corporation", "BAC", 49.92, 49.73));
    stocks.add(new Stock("Taiwan Semiconductor", "TSM", 10.4, 10.52));
    stocks.add(new Stock("AT&T Inc.", "T", 39.7, 39.66));
    stocks.add(new Stock("United States Steel Corporation", "X", 115.81, 114.62));
    stocks.add(new Stock("Exxon Mobil Corporation", "XOM", 81.77, 81.86));
    stocks.add(new Stock("Valero Energy Corporation", "VLO", 72.46, 72.6));
    stocks.add(new Stock("Micron Technology, Inc.", "MU", 12.02, 12.27));
    stocks.add(new Stock("Verizon Communications Inc.", "VZ", 42.5, 42.61));
    stocks.add(new Stock("Avaya Inc.", "AV", 16.96, 16.96));
    stocks.add(new Stock("The Home Depot, Inc.", "HD", 37.66, 37.79));

    stocks.add(new Stock("First Data Corporation", "FDC", 32.7, 32.65));
    return stocks;

  }
}

class Stock extends BaseModel {

  public Stock() {
  }

  public Stock(String name, String symbol, double open, double last) {
    set("name", name);
    set("symbol", symbol);
    set("open", open);
    set("last", last);
    set("date", new Date());
    set("change", last - open);
  }

  public Stock(String name, double open, double change, double pctChange, Date date, String industry) {
    set("name", name);
    set("open", open);
    set("change", change);
    set("percentChange", pctChange);
    set("date", date);
    set("industry", industry);
  }

  public String getIndustry() {
    return get("industry");
  }

  public void setIndustry(String industry) {
    set("industry", industry);
  }

  public Date getLastTrans() {
    return (Date) get("date");
  }

  public String getName() {
    return (String) get("name");
  }

  public String getSymbol() {
    return (String) get("symbol");
  }

  public double getOpen() {
    Double open = (Double) get("open");
    return open.doubleValue();
  }

  public double getLast() {
    Double open = (Double) get("last");
    return open.doubleValue();
  }

  public double getChange() {
    return getLast() - getOpen();
  }

  public double getPercentChange() {
    return getChange() / getOpen();
  }

  public String toString() {
    return getName();
  }

}

and i insert it to my tabPanel like this

final TabItem itemAdmin = new TabItem();  
                   itemAdmin.setId("admin");
                   itemAdmin.setText("Administration ");   
                   //itemAdmin.addText("Administration ici ");  
                   itemAdmin.addStyleName("pad-text"); 
                   itemAdmin.setAutoHeight(true);
                   itemAdmin.setAutoWidth(true);

                   itemAdmin.add(new GridUsers()); //le grid dans le module reporting //le formulaire dans le module administration

When i clic on my page i get this error

14:12:28.062 [ERROR] [mdlight] Uncaught exception escaped

java.lang.RuntimeException: Deferred binding failed for 'com.extjs.gxt.ui.client.widget.grid.GridTemplates' (did you forget to inherit a required module?)
    at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:53)
    at com.google.gwt.core.client.GWT.create(GWT.java:98)
    at com.extjs.gxt.ui.client.widget.grid.GridView.initTemplates(GridView.java:1356)
    at com.extjs.gxt.ui.client.widget.grid.GridView.init(GridView.java:1229)
    at com.extjs.gxt.ui.client.widget.grid.Grid.onRender(Grid.java:880)
    at com.extjs.gxt.ui.client.widget.Component.render(Component.java:1023)
    at com.extjs.gxt.ui.client.widget.Layout.renderComponent(Layout.java:361)
    at com.extjs.gxt.ui.client.widget.Layout.renderAll(Layout.java:352)
    at com.extjs.gxt.ui.client.widget.Layout.onLayout(Layout.java:318)
    at com.extjs.gxt.ui.client.widget.layout.FitLayout.onLayout(FitLayout.java:58)
    at com.extjs.gxt.ui.client.widget.Layout.layout(Layout.java:114)
....
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:281)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:531)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:352)
    at java.lang.Thread.run(Unknown Source)

Is there someone who faced this problem? Thank you in advance for your help.

Kind regards.

This is simply as it states it looks like your missing an inherited module, More specifically the one that contains GridTemplates.class within it as its failing on the create.

Ensure the GXT.jar file is present as well as its dependencies.

Hope it helps

check similar question on stack overflow and the forum of sencha about the same issue

it seems that you have a misfit between the ver of the gxt and the gwt