[CLOSED] Bug in LoadListener

[ashleywong]

I am going to implements a data list which received data from a RPC call. On the loaderLoad method, I wish to pre-select some fields.

However, I found that the loaderLoad() method is not really fired after the loader had loaded the data.

public class DataListStorePage extends LayoutContainer implements EntryPoint {

    public void onModuleLoad() {
        RootPanel.get().add(this);
    }

    @Override
    protected void onRender(Element parent, int pos) {
        super.onRender(parent, pos);

        setLayout(new FlowLayout(10));

        final DataList list = new DataList();
        list.setSelectionMode(SelectionMode.MULTI);
        list.setFlatStyle(true);

        RpcProxy proxy = new RpcProxy() {

            @Override
            protected void load(Object loadConfig, AsyncCallback callback) {
                callback.onSuccess(TestData.getStocks());
            }

        };
        final BaseListLoader loader = new BaseListLoader(proxy);
        loader.addLoadListener(new LoadListener() {

            @Override
            public void loaderLoad(LoadEvent le) {
                Window.alert(list.getItemCount() + "");
            }

        });

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

        DataListBinder<Stock> binder = new DataListBinder<Stock>(list, store);
        binder.setDisplayProperty("name");
        binder.init();

        ContentPanel panel = new ContentPanel();
        panel.setFrame(true);
        panel.setCollapsible(true);
        panel.setAnimCollapse(false);
        panel.setButtonAlign(HorizontalAlignment.CENTER);
        panel.setIconStyle("icon-list");
        panel.setHeading("Store DataList");
        panel.setLayout(new FitLayout());
        panel.add(list);
        panel.setSize(230, 250);

        ToolBar toolBar = new ToolBar();

        final StoreFilter<Stock> filter = new StoreFilter<Stock>() {
            public boolean select(Store store, Stock parent, Stock item,
                    String property) {
                if (item.getName().charAt(0) == 'A') {
                    return false;
                }
                return true;
            }
        };
        store.addFilter(filter);

        TextToolItem sort = new TextToolItem("Sort");
        sort.setIconStyle("my-icon-asc");
        sort.addSelectionListener(new SelectionListener() {
            public void componentSelected(ComponentEvent ce) {
                store.sort("name", SortDir.ASC);
            }
        });

        final ToggleToolItem filterItem = new ToggleToolItem("Filter A's");
        filterItem.setIconStyle("icon-filter");
        filterItem.addSelectionListener(new SelectionListener() {
            public void componentSelected(ComponentEvent ce) {
                if (filterItem.isPressed()) {
                    store.applyFilters("name");
                } else {
                    store.clearFilters();
                }

            }
        });
        toolBar.add(sort);
        toolBar.add(new SeparatorToolItem());
        toolBar.add(filterItem);
        panel.setTopComponent(toolBar);

        add(panel);

        DeferredCommand.addCommand(new Command() {

            public void execute() {
                loader.load();
            }

        });
    }
}

[darrellmeyer]

It is fired after the load event, but before the list has responded to the event. You should be checking the data in the event:

    loader.addLoadListener(new LoadListener() {
      @Override
      public void loaderLoad(LoadEvent le) {
        Window.alert("count: " + ((List)le.data).size());
      }
    });

If you add your listener after you create the store, your code will work as the stores listener will be executed before yours.

[ashleywong]

Thanks for advance.

Actually, I want to pick up some entries to pre-select. However, le.getData() can only get the List<Stock>. How do I get the DataListItem?

Attached is the available select method of DataList.

[ashleywong]

If you add your listener after you create the store, your code will work as the stores listener will be executed before yours.

Sorry, I got it. Thanks