GWT/GWT Bootstrap - Pagination (SimplePager) - gwt

Question

I have a celltable and I'm trying implement pagination, but it doesn't work. I looked for solutions but without any success. I click in next page, nothing happens. I forgot to implement something? Someone can help me? Thanks for attention! Below, my implementation:
Java:
public class TaskPanel extends Composite {
private static TaskPanelUiBinder uiBinder = GWT
.create(TaskPanelUiBinder.class);
interface TaskPanelUiBinder extends UiBinder<Widget, TaskPanel> {
}
public TaskPanel() {
this.tableTask = createTableTask();
//Populate celltable
preencheListaTask();
initWidget(uiBinder.createAndBindUi(this));
}
#UiField(provided = true)
CellTable<Task> tableTask;
#UiField
AccordionGroup accordionTable;
#UiField Button btnRefresh;
#UiField SimplePager pager;
#UiField FormTaskPanel formTask;
List<Task> listTasks = new ArrayList<Task>();
ListDataProvider<Task> tableTaskProvider;
public List<Task> getListTasks() {
return this.listTasks;
}
public void setListTasks(List<Task> lista) {
this.listTasks = lista;
}
public TaskPanel getTaskPanel() {
return this;
}
//Create celltable
public CellTable<Task> createTableTask() {
tableTask = new CellTable<Task>();
tableTask.setPageSize(2);
TextColumn<Task> dataInicioColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDataInicial();
}
};
tableTask.addColumn(dataInicioColumn, "Data Inicio");
TextColumn<Task> dataFinalColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDataFinal();
}
};
tableTask.addColumn(dataFinalColumn, "Data Final");
TextColumn<Task> descricaoColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDescricao();
}
};
tableTask.addColumn(descricaoColumn, "Descricao");
TextColumn<Task> categoriaColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getCategoria();
}
};
tableTask.addColumn(categoriaColumn, "Categoria");
TextColumn<Task> prioridadeColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getPrioridade();
}
};
tableTask.addColumn(prioridadeColumn, "Prioridade");
return tableTask;
}
//Generate a JSON, and I parse for List<Task> to populate celltable
public List<Task> preencheListaTask() {
final List<Task> lista = new ArrayList<Task>();
String url = "http://127.0.0.1:8888/financecontrol/jsonTableTasks.json";
RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
try {
Request request = builder.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable exception) {
System.out.println("Error to retrieve JSON");
}
#Override
public void onResponseReceived(Request arg0, Response response) {
if (200 == response.getStatusCode()) {
JSONValue value = JSONParser.parse(response.getText());
com.google.gwt.json.client.JSONObject taskObjs = value
.isObject();
JSONArray tasksArray = taskObjs.get("tasks").isArray();
if (tasksArray != null) {
for (int i = 0; i < tasksArray.size(); i++) {
com.google.gwt.json.client.JSONObject taskObj = tasksArray
.get(i).isObject();
String id = taskObj.get("ID").isNumber().toString();
String dataInicial = taskObj
.get("Data Inicial").isString()
.stringValue();
String dataFinal = taskObj.get("Data Final")
.isString().stringValue();
String descricao = taskObj.get("Descricao")
.isString().stringValue();
String categoria = taskObj.get("Categoria").isString().toString();
String prioridade = taskObj.get("Prioridade").isString().toString();
Task task = new Task(Integer.parseInt(id),
dataInicial, dataFinal,
descricao, categoria, prioridade);
lista.add(task);
}
setListTasks(lista);
System.out.println("JSON retrieve");
}
addLinhas();
} else {
System.out.println("Couldn't retrieve JSON ("
+ response.getStatusText() + ")");
}
}
});
} catch (RequestException e) {
System.err.println("Erro cath - " + e.getMessage());
}
return lista;
}
//add rows to celltable
public void addLinhas() {
this.tableTask.setRowCount(getListTasks().size(), true);
this.tableTask.setRowData(0, getListTasks());
tableTask.redraw();
tableTaskProvider = new ListDataProvider<Task>(getListTasks());
tableTaskProvider.addDataDisplay(tableTask);
//Pagination
SimplePager.Resources pagerResources = GWT.create(SimplePager.Resources.class);
pager = new SimplePager(TextLocation.CENTER, pagerResources, false, 0, true);
pager.setDisplay(tableTask);
}
#UiHandler("btnRefresh")
public void onClickRefresh(ClickEvent e) {
preencheListaTask();
}
}
UiBinder:
<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:style>
.formContent {
height: 70%;
}
</ui:style>
<b:Container addStyleNames="{style.formContent}">
<r:FormTaskPanel ui:field="formTask"/>
<b:AccordionGroup ui:field="accordionTable" defaultOpen="false" heading="Task List">
<b:CellTable ui:field="tableTask" />
<b:SimplePager ui:field="pager" location="CENTER"/>
<b:Button ui:field="btnRefresh" text="Refresh" icon="REFRESH"/>
</b:AccordionGroup>
</b:Container>

Answer 1

You have pager = new SimplePager(...), so you have to declare #uiField(provided = true) for pager, and move pager declaration/initialisation into your createTableTask function (pager must be set before initwidget).