import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
public void fireEvent(GwtEvent<?> event) {
    if (event.getAssociatedType().equals(RowCountChangeEvent.getType())) {
        rowCountHandlers.forEach((h) -> h.onRowCountChange((RowCountChangeEvent) event));
    } else if (event.getAssociatedType().equals(RangeChangeEvent.getType())) {
        rangeHandlers.forEach((h) -> h.onRangeChange((RangeChangeEvent) event));
    }
}
 

import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
@UiHandler("table")
void onRangeChange(RangeChangeEvent event) {
  Range r = event.getNewRange();
  int start = r.getStart();

  fetch(start);
}
 

import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
@Override
public HandlerRegistration addRangeChangeHandler( final RangeChangeEvent.Handler handler ) {
    return dataGrid.addRangeChangeHandler( handler );
}
 

import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
@Override
public HandlerRegistration addRangeChangeHandler(final RangeChangeEvent.Handler handler) {
    return dataGrid.addRangeChangeHandler(handler);
}
 

import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
/**
     * <p><font color='red'>This method is not in use, and will
     * throw an UnsupportedOperationException.</font></p>
     *  @throws UnsupportedOperationException
     */
    @Override
    public HandlerRegistration addRangeChangeHandler(RangeChangeEvent.Handler handler) {
//        throw new UnsupportedOperationException();
    	return null;
    }
 

import com.google.gwt.view.client.RangeChangeEvent; //导入依赖的package包/类
@Override
public HandlerRegistration addRangeChangeHandler(RangeChangeEvent.Handler handler) {
  return presenter.addRangeChangeHandler(handler);
}