Probably you registered more than one the handler.
On 19 October 2014 14:11, Grisha Shoihet <[email protected]> wrote:
> hello,
>
> I am new in GWT and try to implement AsyncDataProvider with DataGrid and
> SimplePager.
> All working as expected except strange behavior
> in SearchResultsAsyncDataProvider.
> I need to update DataGrid each time with new results and it is working ,
> but when I try to use pagination seems that DataGrid fire events for all
> previous results also(maybe its related to history mechanism).
>
> Please advice if you have any idea?
> I use mvp with activities and places parent.
>
> public class SearchResultsAsyncDataProvider extends
> AsyncDataProvider<SearchDocument> {
>
> Logger logger = Logger.getLogger("SearchResultsAsyncDataProvider");
> private final ClientFactory clientFactory;
> private String searchQuery = null;
>
> public SearchResultsAsyncDataProvider(String searchQuery,final
> ClientFactory clientFactory) {
> this.searchQuery = searchQuery;
> this.clientFactory = clientFactory;
> }
>
> /**
> * {@link #onRangeChanged(HasData)} is called when the table requests a new
> * range of data. You can push data back to the displays using
> * {@link #updateRowData(int, List)}.
> */
> @Override
> protected void onRangeChanged(HasData<SearchDocument> display) {
>
> *//here i expect to once access...*
>
> }
>
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------
> public class SearchResultsViewImpl extends Composite implements
> SearchResultsView{
>
> private static SearchResultsViewImplUiBinder uiBinder =
> GWT.create(SearchResultsViewImplUiBinder.class);
>
> interface SearchResultsViewImplUiBinder extends UiBinder<Widget,
> SearchResultsViewImpl> {}
>
> @UiField
> Label labelInformation;
> @UiField(provided = true)
> DataGrid<SearchDocument> dataGridSearchResults;
> @UiField(provided = true)
> SimplePager simplePagerSearchResults;
> private SearchResultsPresenter searchResultsPresenter;
> private SearchResultsAsyncDataProvider searchResultsAsyncDataProvider;
> private final String COLUMN_NAME = "Name";
> private TextColumn<SearchDocument> columnName;
>
> public SearchResultsViewImpl()
> {
> this.dataGridSearchResults = new DataGrid<SearchDocument>();
> this.dataGridSearchResults.setEmptyTableWidget(new Label("No Data to
> Display"));
> this.simplePagerSearchResults = new SimplePager();
> initWidget(uiBinder.createAndBindUi(this));
> //this.setSize("500px", "500px");
> this.dataGridSearchResults.setSize("500px","500px");
> this.buildGrid();
> }
>
> private void buildGrid()
> {
> // Build each of the 7 columns
> columnName = buildColumnName();
>
> // Add the columns to the widget
> this.dataGridSearchResults.addColumn(columnName,
> buildHeader(COLUMN_NAME), buildHeader(COLUMN_NAME));
>
> this.dataGridSearchResults.setColumnWidth(0, 60, Unit.PX);
> // Make efficient for IE
> //this.dataGridSearchResults.setSkipRowHoverCheck(true);
> //this.dataGridSearchResults.setSkipRowHoverFloatElementCheck(true);
> //this.dataGridSearchResults.setSkipRowHoverStyleUpdate(true);
> }
> private TextColumn<SearchDocument> buildColumnName()
> {
> columnName = new TextColumn<SearchDocument>()
> {
> @Override
> public String getValue(SearchDocument object)
> {
> return object.getName();
> }
> };
> columnName.setDataStoreName(COLUMN_NAME);
> columnName.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);
> columnName.setVerticalAlignment(HasVerticalAlignment.ALIGN_TOP);
> return columnName;
> }
> private Header<String> buildHeader(final String text){
> Header<String> head = new Header<String>(new TextCell()){
> @Override
> public String getValue() {
> return text;
> }
> };
> return head;
> }
>
> private void addColumnSortAsyncHandling() {
> columnName.setSortable(true);
> // columnTitle.setSortable(true);
> // columnDate.setSortable(true);
>
> ColumnSortEvent.AsyncHandler columnSortHandler =
> new ColumnSortEvent.AsyncHandler(this.dataGridSearchResults);
> this.dataGridSearchResults.addColumnSortHandler(columnSortHandler);
> }
> private void createAsyncDataProvider() {
> this.searchResultsAsyncDataProvider =
> new SearchResultsAsyncDataProvider(
> this.searchResultsPresenter.getSearchQuery(),
> this.searchResultsPresenter.getClientFactory());
> this.dataGridSearchResults.setVisibleRangeAndClearData(new Range(0,15),
> true);
> //this.dataGridSearchResults.setPageSize(15);
> this.simplePagerSearchResults.setDisplay(this.dataGridSearchResults);
> this.simplePagerSearchResults.startLoading();
>
> this.searchResultsAsyncDataProvider.addDataDisplay(this.dataGridSearchResults);
> //call presenter here to get estimation from db for update row count
> this.searchResultsAsyncDataProvider.updateRowCount(55, true);
> this.labelInformation.setText("Search results for :
> \""+this.searchResultsPresenter.getSearchQuery()+"\"");
> //addColumnSortAsyncHandling();
> }
>
> @Override
> public void reset() {
> this.createAsyncDataProvider();
> }
>
> @Override
> public void setSearchResultsPresenter(
> SearchResultsPresenter searchResultsPresenter) {
> this.searchResultsPresenter = searchResultsPresenter;
> }
> }
>
> ---------------------------------------------------------------------------------------------------------------------------------------------------
>
> public class SearchResultsActivity extends AbstractActivity implements
> SearchResultsPresenter{
>
> // Used to obtain views, eventBus, placeController
> private final ClientFactory clientFactory;
> private SearchResultsView searchResultsView = null;
> private SearchResultsPlace searchResultsPlace = null;
> public SearchResultsActivity(SearchResultsPlace searchResultsPlace,
> final ClientFactory clientFactory){
> this.clientFactory = clientFactory;
> this.searchResultsPlace = searchResultsPlace;
> }
> @Override
> public void start(AcceptsOneWidget panel, EventBus eventBus) {
> //reset view here . clear adapter set new keyword etc...
> this.searchResultsView = this.clientFactory.getSearchResultsView(this);
> this.searchResultsView.reset();
> panel.setWidget(this.searchResultsView.asWidget());
> }
> @Override
> public void goTo(Place place) {
> this.clientFactory.getPlaceController().goTo(place);
> }
>
> @Override
> public ClientFactory getClientFactory() {
> return this.clientFactory;
> }
>
> @Override
> public String getSearchQuery() {
> return this.searchResultsPlace.getValue();
> }
> }
>
> --------------------------------------------------------------------------------------------------------------------------------
>
>
>
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