com.google.gwt.view.client.HasData Java Examples

/**
 * This is invoked internally by the PagedTable on navigation actions.
 */
protected void onRangeChanged(final HasData<Integer> display) {
    int start = ((PagedTable) display).getPageStart();
    final List<Integer> rows = getCurrentPageRows(display);

    if (lastOffset == start) {
        updateRowData(lastOffset, rows);
    }
    else {
        lastOffset = start;
        getPresenter().lookupCurrentPage(rowsFetched -> {
            updateRowData(lastOffset, rows);
            table.setHeight(calculateHeight(rowsFetched) + "px");
        });
    }
}
 

@Override
protected <C> Widget createPager(final HasData<C> display)
{
    // by returning null we can prevent the "flickering" of the "show more" link
    // see http://stackoverflow.com/a/6827755/1538056
    //return null;


    PageSizePager pager = new PageSizePager(Integer.MAX_VALUE);

    // removes the text "Show More" during loading
    display.setRowCount(0);

    // increase the visible range so that no one ever needs to page
    display.setVisibleRange(0, Integer.MAX_VALUE);
    pager.setDisplay(display);

    return pager;
}
 

protected List<Integer> getCurrentPageRows(HasData<Integer> display) {
    final int start = ((PagedTable) display).getPageStart();
    int pageSize = ((PagedTable) display).getPageSize();
    int end = start + pageSize;
    if (end > table.getRowCount()) {
        end = table.getRowCount();
    }

    final List<Integer> rows = new ArrayList<Integer>(end-start);
    for (int i = 0; i < end-start; i++) {
        rows.add(i);
    }
    return rows;
}
 

/**
 * Invoked from createWidget just after the data set has been fetched.
 */
public void addDataDisplay(HasData<Integer> display) {
    // Avoid fetching the data set again
    lastOffset = 0;

    // This calls internally to onRangeChanged()
    super.addDataDisplay(display);
}
 

/**
 * Fire an event to the {@link com.google.gwt.cell.client.AbstractCell}.
 *
 * @param event the native event
 */
@SuppressWarnings("unchecked")
protected void fireEventToCell(NativeEvent event) {
  if (parentNodeInfo == null) {
    return;
  }

  Cell<T> parentCell = parentNodeInfo.getCell();
  String eventType = event.getType();
  Element cellParent = getCellParent();
  Object key = getValueKey();
  Context context = new Context(getIndex(), 0, key);
  boolean cellWasEditing = parentCell.isEditing(context, cellParent, value);

  // Update selection.
  boolean isSelectionHandled = parentCell.handlesSelection() || KeyboardSelectionPolicy.BOUND_TO_SELECTION == tree.getKeyboardSelectionPolicy();
  HasData<T> display = (HasData<T>)parentNode.listView;
  CellPreviewEvent<T> previewEvent = CellPreviewEvent.fire(display, event, display, context, value, cellWasEditing, isSelectionHandled);

  // Forward the event to the cell.
  if (previewEvent.isCanceled() || !cellParent.isOrHasChild(Element.as(event.getEventTarget()))) {
    return;
  }
  Set<String> consumedEvents = parentCell.getConsumedEvents();
  if (consumedEvents != null && consumedEvents.contains(eventType)) {
    parentCell.onBrowserEvent(context, cellParent, value, event, parentNodeInfo.getValueUpdater());
    tree.cellIsEditing = parentCell.isEditing(context, cellParent, value);
    if (cellWasEditing && !tree.cellIsEditing) {
      CellBasedWidgetImpl.get().resetFocus(new Scheduler.ScheduledCommand() {
        @Override
        public void execute() {
          tree.setFocus(true);
        }
      });
    }
  }
}
 

/**
 * Create a pager to control the list view.
 *
 * @param <C> the item type in the list view
 * @param display the list view to add paging too
 * @return the pager
 */
protected <C> Widget createPager(HasData<C> display) {
  if (pagerFactory == null) {
    return null;
  }
  AbstractPager pager = pagerFactory.create(display);
  pager.setDisplay(display);
  return pager;
}
 

@Override
protected void onRangeChanged(final HasData<AuditLogItem> display) {
    Range range = display.getVisibleRange();
    int start = min(range.getStart(), store.size() - 1);
    int end = min(start + range.getLength(), store.size());
    List<AuditLogItem> items = store.subList(start, end);
    display.setRowData(start, items);
}
 

private void clearSelection() {
    for (HasData<T> table : delegate.getDataDisplays()) {
        SelectionModel<? super T> selectionModel = table.getSelectionModel();
        if (selectionModel instanceof SingleSelectionModel) {
            SingleSelectionModel<T> sm = (SingleSelectionModel<T>) selectionModel;
            T selectedObject = sm.getSelectedObject();
            if (selectedObject != null) {
                ((SingleSelectionModel<T>) selectionModel).setSelected(selectedObject, false);
            }
        }
    }
}