我试图找到将新条目添加到GWT DataGrid小部件中的任何解决方案，但它没有成功。
我有一个自定义DataGrid小部件的以下代码：
/**
* Custom DataGridWidget with asynchronous data transferring.
*/
public class DataGridWidget implements EntryPoint {
/* Path to UI template */
@UiTemplate("ui/DataGridWidget.ui.xml")
/* Interface for using UiBinder */
interface IDataGridWidget extends UiBinder<Widget, DataGridWidget> {
}
/* Instance of IDataGridWidget interface for next initialization of this widget */
private static IDataGridWidget dataGridWidget = GWT.create(IDataGridWidget.class);
/* Instance of service class for getting data from server in async mode */
protected static GettingServiceAsync gettingService = GWT.create(GettingService.class);
/* DataGrid */
@UiField(provided=true)
DataGrid<Contact> dataGrid;
/* "Add entry" button */
@UiField(provided=true)
Button bAdd;
/**
* Entry point method.
*/
public void onModuleLoad() {
/* Initialization of dataGrid */
dataGrid = new DataGrid<Contact>();
/* Create name column */
TextColumn<Contact> nameColumn = new TextColumn<Contact>() {
@Override
public String getValue(Contact contact) {
return contact.name;
}
};
/* Create address column. */
TextColumn<Contact> addressColumn = new TextColumn<Contact>() {
@Override
public String getValue(Contact contact) {
return contact.address;
}
};
/* Add the columns */
table.addColumn(nameColumn, "Name");
table.addColumn(addressColumn, "Address");
/* Create a data provider */
CustomDataProvider dataProvider = new CustomDataProvider();
/* Connect the dataGrid to the data provider. */
dataProvider.addDataDisplay(dataGrid);
/* Initialization of the "Add entry" button */
bAdd = new Button("Add entry", new ClickHandler() {
public void onClick(ClickEvent event) {
/* SOME CODE FOR ADDING A NEW ENTRY */
}
});
/* Initialization of dataGridWidget */
initWidget(dataGridWidget.createAndBindUi(this));
}
}
我有一个自定义AsyncDataProvider的代码：
/**
* Custom AsyncDataProvider for transferring data from the server.
*/
protected class CustomDataProvider extends AsyncDataProvider<Contact> {
@Override
protected void onRangeChanged(HasData<Contact> display) {
/* Get a new Range */
final Range range = display.getVisibleRange();
/* Start of range */
final int start = range.getStart();
/* How much entries we will get */
int length = range.getLength();
/* AsyncCallback for retreiveing entries form the server */
gettingService.getRangeContacts(start, length, new AsyncCallback<List<Contact>>() {
public void onSuccess(List<Contact> result) {
/* Updating data into the dataGrid */
updateRowData(start, result);
}
public void onFailure(Throwable caught) {
Window.alert("Error transferring data from the server");
}
});
}
}
也许有人有解决方案？感谢。