1>Thanks Chris, but I dont understand why,when and where should I call this
createSimplepager();
2>And If it gets called all by itself can you please help me understand how
do I add that newly created instance if SimplePager to a VerticalPanel.
As i want to add the simplePager to the south of my Docklayoutpanel, which I
do by adding the SimplePager instance to a vertical panel.
3>In brief I want to further use the newly created instance of SimplePager,
but I didnt found how to do it.
On Sun, Oct 9, 2011 at 4:12 AM, chris <chris.hins...@gmail.com> wrote:
> I ran into the same problem today and can tell you that it is most
> likely the @UiField(provided=true) annotation. I think I see your
> problem and you are creating another SimplePager in your constructor
> and it is not being assigned to pager1. This is what is giving you the
> null pointer exception. I would recommed using the @UiFactory
> annotation on a function to create your objects, then you do not need
> the provided=true in you @Uifield. It really doesn't matter which
> syntax you use but I like to keep my constructors pretty simple. Hope
> that helps.
>
> @UiFactory
> SimplePager createSimplePager() {
> SimplePager simplePager = new SimplePager();
> simplePager = new SimplePager(TextLocation.RIGHT);
> simplePager.setPageSize(10);
> simplePager.setRangeLimited(true);
> return simplePager;
> }
>
>
>
>
> On Oct 5, 12:52 am, Karzai <kapil2ka...@gmail.com> wrote:
> > Hi I m getting the following error can anyone please help me in
> > resolving and getting a proper pagination flow, on clicking of the
> > paginate icon. below is the code I have been trying to use and the
> > exception I'm getting :
> >
> > Exception :
> > ===========
> >
> > 11:17:33.939 [ERROR] [myapps] Unable to load module entry point class
> > com.apps.app1.client.Myapps (see associated exception for details)
> >
> > java.lang.NullPointerException: null
> > at
> >
> com.google.gwt.user.client.ui.HTMLPanel.addAndReplaceElement(HTMLPanel.java:197)
> > at
> >
> com.apps.app1.client.GridData_GridDataUiBinderImpl.createAndBindUi(GridData_GridDataUiBinderImpl.java:
> > 37)
> > at
> >
> com.apps.app1.client.GridData_GridDataUiBinderImpl.createAndBindUi(GridData_GridDataUiBinderImpl.java:
> > 1)
> > at com.apps.app1.client.GridData.<init>(GridData.java:61)
> > at com.apps.app1.client.Myapps.onModuleLoad(Myapps.java:14)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> > 39)
> > at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
> > 25)
> > at java.lang.reflect.Method.invoke(Method.java:597)
> > at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:
> > 396)
> > at
> >
> com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:
> > 200)
> > at
> >
> com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:
> > 525)
> > at
> >
> com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:
> > 363)
> > at java.lang.Thread.run(Thread.java:619)
> >
> > The GridData.java file
> > ==================
> >
> > package com.apps.app1.client;
> >
> > import java.util.ArrayList;
> > import java.util.Comparator;
> > import java.util.Date;
> > import java.util.List;
> >
> > import com.apps.app1.client.Contact.Category;
> > import com.google.gwt.cell.client.CheckboxCell;
> > import com.google.gwt.cell.client.DateCell;
> > import com.google.gwt.cell.client.EditTextCell;
> > import com.google.gwt.cell.client.FieldUpdater;
> > import com.google.gwt.cell.client.NumberCell;
> > import com.google.gwt.cell.client.SelectionCell;
> > import com.google.gwt.core.client.GWT;
> > import com.google.gwt.dom.client.Style.Unit;
> > import com.google.gwt.event.dom.client.ClickEvent;
> > import com.google.gwt.event.dom.client.ClickHandler;
> > import com.google.gwt.safehtml.shared.SafeHtmlUtils;
> > import com.google.gwt.uibinder.client.UiBinder;
> > import com.google.gwt.uibinder.client.UiField;
> > import com.google.gwt.user.cellview.client.Column;
> > import com.google.gwt.user.cellview.client.DataGrid;
> > import com.google.gwt.user.cellview.client.Header;
> > import com.google.gwt.user.cellview.client.SafeHtmlHeader;
> > import com.google.gwt.user.cellview.client.SimplePager;
> > import com.google.gwt.user.cellview.client.TextColumn;
> > import
> > com.google.gwt.user.cellview.client.ColumnSortEvent.ListHandler;
> > import
> >
> com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
> > import com.google.gwt.user.cellview.client.SimplePager.TextLocation;
> > import com.google.gwt.user.client.ui.Button;
> > import com.google.gwt.user.client.ui.Composite;
> > import com.google.gwt.user.client.ui.DialogBox;
> > import com.google.gwt.user.client.ui.VerticalPanel;
> > import com.google.gwt.user.client.ui.Widget;
> > import com.google.gwt.view.client.ListDataProvider;
> > import com.google.gwt.view.client.SelectionChangeEvent;
> > import com.google.gwt.view.client.SingleSelectionModel;
> >
> > public class GridData extends Composite {
> >
> > private static GridDataUiBinder uiBinder = GWT
> > .create(GridDataUiBinder.class);
> >
> > interface GridDataUiBinder extends UiBinder<Widget, GridData> {
> > }
> >
> > @UiField(provided = true)
> > DataGrid<Contact> table;
> > @UiField(provided = true)
> > SimplePager pager1;
> >
> > public GridData() {
> >
> > table = new DataGrid<Contact>();
> > SimplePager.Resources pagerResources =
> > GWT.create(SimplePager.Resources.class);
> > SimplePager pager1 = new SimplePager(TextLocation.CENTER,
> > pagerResources, false, 0, true);
> > pager1.setDisplay(table);
> > initWidget(uiBinder.createAndBindUi(this));
> >
> table.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);
> > /*DockLayoutPanel mainPanel = new
> DockLayoutPanel(Unit.EM);
> > VerticalPanel panel = new VerticalPanel();
> > panel.setBorderWidth(5);
> > panel.setTitle("North");
> > VerticalPanel panel1 = new VerticalPanel();
> > panel.setBorderWidth(5);
> > panel1.setTitle("East");
> > VerticalPanel panel2 = new VerticalPanel();
> > panel.setBorderWidth(5);
> > panel2.setTitle("West");
> > VerticalPanel panel3 = new VerticalPanel();
> > panel.setBorderWidth(5);
> > panel2.setTitle("South");
> >
> > mainPanel.insertNorth(panel, 10.0, null);
> > mainPanel.insertWest(panel1, 10.0, null);
> > mainPanel.insertEast(panel2, 10.0, null);
> > */
> >
> > table.setWidth("100%");
> > final ListDataProvider<Contact> dataProvider = new
> > ListDataProvider<Contact>();
> > dataProvider.addDataDisplay(table);
> >
> > String[] categoryArray = new String[]
> > {"Jack","Ron","Hermaine","Harry","Voldermort"};
> > final Category[] categories = new
> Category[categoryArray.length];
> > for(int i = 0 ; i< categoryArray.length; i++)
> > {
> > categories[i] = new Category(categoryArray[i]);
> > }
> > List<Contact> CONTACTS = dataProvider.getList();
> > Contact contact = new Contact();
> > CONTACTS = contact.getContacts();
> >
> > Column<Contact, Number> ageColumn = new Column<Contact,
> Number>(new
> > NumberCell()) {
> >
> > @Override
> > public Integer getValue(Contact object) {
> > // TODO Auto-generated method stub
> > return object.age;
> > }
> > };
> >
> > List<String> categoryName = new ArrayList<String>();
> > for(Category category : categories){
> >
> > categoryName.add(category.getDisplayName());
> > }
> > SelectionCell selectionCell = new
> SelectionCell(categoryName);
> > Column<Contact, String> categoryColumn = new
> Column<Contact,
> > String>(selectionCell) {
> >
> > @Override
> > public String getValue(Contact object) {
> > // TODO Auto-generated method stub
> > return object.category.getDisplayName();
> > }
> > };
> > table.setColumnWidth(categoryColumn, 40.0, Unit.PX);
> > table.addColumn(categoryColumn, "category", "Category");
> > Header<String> ageFooter = new Header<String>(new
> EditTextCell()) {
> > @Override
> > public String getValue() {
> > List<Contact> items =
> table.getVisibleItems();
> > if (items.size() == 0) {
> > return "";
> > } else {
> > int totalAge = 0;
> > for (Contact item : items) {
> > totalAge += item.age;
> > }
> > return "Avg: " + totalAge /
> items.size();
> > }
> > }
> > };
> > table.setColumnWidth(ageColumn, 40.0, Unit.PX);
> > table.addColumn(ageColumn, new
> > SafeHtmlHeader(SafeHtmlUtils.fromSafeConstant("Age")), ageFooter);
> >
> > ListHandler<Contact> sortHandler = new
> > ListHandler<Contact>(dataProvider.getList());
> > table.addColumnSortHandler(sortHandler);
> >
> > Column<Contact, String> nameColumn = new Column<Contact,
> String>(new
> > EditTextCell()) {
> >
> > @Override
> > public String getValue(Contact object) {
> > // TODO Auto-generated method stub
> > return object.name;
> > }
> > };
> > nameColumn.setSortable(true);
> > sortHandler.setComparator(nameColumn, new
> Comparator<Contact>() {
> > public int compare(Contact o1, Contact o2) {
> > return -((o1.name).compareTo(o2.name));
> > }
> > });
> >
> > table.addColumn(nameColumn, "Name", "Name");
> > nameColumn.setFieldUpdater(new FieldUpdater<Contact,
> String>() {
> >
> > @Override
> > public void update(int index, Contact object,
> String value) {
> > // TODO Auto-generated method stub
> > object.name = value;
> > dataProvider.refresh();
> > }
> > });
> > table.setColumnWidth(nameColumn, 60.0, Unit.PX);
> > TextColumn<Contact> addressColumn = new
> TextColumn<Contact>() {
> >
> > @Override
> > public String getValue(Contact object) {
> > // TODO Auto-generated method stub
> > return object.address;
> > }
> > };
> > addressColumn.setSortable(true);
> > addressColumn.setFieldUpdater(new FieldUpdater<Contact,
> String>() {
> >
> > @Override
> > public void update(int index, Contact object,
> String value) {
> > // TODO Auto-generated method stub
> > object.address = value;
> > dataProvider.refresh();
> > }
> > });
> > table.setColumnWidth(addressColumn, 70.0, Unit.PX);
> > table.addColumn(addressColumn, "Address", "Address");
> >
> > DateCell dateCell = new DateCell();
> > Column<Contact, Date> dateColumn = new Column<Contact,
> > Date>(dateCell) {
> >
> > @Override
> > public Date getValue(Contact object) {
> > // TODO Auto-generated method stub
> > return object.birthday;
> >
> > }
> > };
> > table.setColumnWidth(dateColumn, 40.0, Unit.PX);
> > table.addColumn(dateColumn, "Date", "Birthday");
> > /*final SelectionModel<Contact> selectionModel12 = new
> > MultiSelectionModel<Contact>();
> > table.setSelectionModel(selectionModel12,
> > DefaultSelectionEventManager.<Contact>createCheckboxManager());*/
> > final SingleSelectionModel<Contact> selectionModel1
> = new
> > SingleSelectionModel<Contact>();
> > table.setSelectionModel(selectionModel1);
> > selectionModel1.addSelectionChangeHandler(new
> > SelectionChangeEvent.Handler() {
> > @Override
> > public void
> onSelectionChange(SelectionChangeEvent event) {
> > // TODO Auto-generated method stub
> > Contact selected =
> selectionModel1.getSelectedObject();
> > if(selected != null)
> > {
> > final DialogBox box = new
> DialogBox();
> > box.setAnimationEnabled(true);
> > box.setHTML(selected.name);
> > box.setText(selected.name);
> > VerticalPanel w = new
> VerticalPanel();
> > //w.setSize("5px", "10px");
> > w.setBorderWidth(1);
> > /*Image image = new
> Image("D:\\checkout1\\rocro-modularization\
> > \rocro-web\\rocro-entrypoint\\target\\rocro-entrypoint\
> > \com.subex.rocro.web.app.ROCroApplication\\resources\\common\\icons\
> > \ol_close.png");
> > image.addClickHandler(new
> ClickHandler() {
> >
> > @Override
> > public void
> onClick(ClickEvent event) {
> > // TODO
> Auto-generated method stub
> > box.hide();
> > }
> > });
> > image.setSize("50px", "30px");
> > w.add(image)*/
> > w.add(new Button("Close IT", new
> ClickHandler() {
> >
> > @Override
> > public void
> onClick(ClickEvent event) {
> > // TODO
> Auto-generated method stub
> > box.hide();
> > }
> > }));
> > w.setTitle(selected.name);
> > box.setPopupPosition(350, 100);
> > box.add(w);
> > box.show();
> > }
> > }
> > });
> > Column<Contact, Boolean> checkColumn = new
> Column<Contact,
> > Boolean>(new CheckboxCell(true, false)) {
> >
> > @Override
> > public Boolean getValue(Contact object) {
> >
> > return
> selectionModel1.isSelected(object);
> > }
> > };
> > table.addColumn(checkColumn,
> SafeHtmlUtils.fromSafeConstant("<br/>"));
> >
> > table.setColumnWidth(checkColumn, 40, Unit.PX);
> > table.setVisibleRange(0, 13);
> > table.setRowCount(CONTACTS.size(), true);
> > table.setRowData(0, CONTACTS);
> > /*mainPanel.insertSouth(pager, 10.0, null);
> > VerticalPanel panel4 = new VerticalPanel();
> > panel4.add(table);
> > panel4.add(pager);
> > mainPanel.add(table); */
> > /*RootLayoutPanel.get().add(mainPanel);*/
> >
> > }
> >
> > }
> >
> > the GridData.ui.xml file
> > ===================
> >
> > <!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent";>
> > <ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
> > xmlns:g="urn:import:com.google.gwt.user.client.ui"
> > xmlns:c="urn:import:com.google.gwt.user.cellview.client">
> >
> > <g:DockLayoutPanel
> > unit="EM">
> > <!-- DataGrid. -->
> > <g:center>
> > <c:DataGrid
> > ui:field="table" />
> > </g:center>
> >
> > <!-- Pager. -->
> > <g:south
> > size="3">
> > <g:HTMLPanel>
> > <table
> > style="width:100%">
> > <tr>
> > <td
> > align='center'>
> > <c:SimplePager ui:field="pager1"/>
> > </td>
> > </tr>
> > </table>
> > </g:HTMLPanel>
> > </g:south>
> > </g:DockLayoutPanel>
> > </ui:UiBinder>
> >
> > the Myapps.java file
> > ===================
> >
> > package com.apps.app1.client;
> >
> > import com.google.gwt.core.client.EntryPoint;
> > import com.google.gwt.user.client.ui.RootLayoutPanel;
> >
> > /**
> > * Entry point classes define <code>onModuleLoad()</code>.
> > */
> > public class Myapps implements EntryPoint {
> >
> > @Override
> > public void onModuleLoad() {
> > GridData data = new GridData();
> > RootLayoutPanel.get().add(data);
> > }
> >
> > }
> >
> > Please help me out in getting the a proper solution for it.
>
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