如何在 NatTable 中将值排序为数字？

Question

我的问题是，尽管我使用了DefaultDoubleDisplayConverter，但数据值被排序为字符串。我将转换器注册到单元格标签，而不是列标题标签。我的代码：

public class NatTableFactory {
  private NatTable createTable(Composite parent, List<TableLine> tLines, String[][] propertyNames,
      PropertyToLabels[] propToLabels, TableParams params, TextMatcherEditor<TableLine>editor, boolean openableParts) {
    
    BodyLayerStack bodyLayerStack =
        new BodyLayerStack(
                tLines,
                tLines.get(0).getLength(),
                params.getColumnIndicesForRowHeaders());
    
    ...

    SortHeaderLayer<TableLine> sortHeaderLayer =
        new SortHeaderLayer<TableLine>(
            columnHeaderLayer,
            new GlazedListsSortModel<TableLine>(
                bodyLayerStack.getSortedList(),
                getSortingColumnPropAccessor(propertyNames[0]),
                configRegistry,
                columnHeaderDataLayer));
 
    ...
    
    composite.addConfiguration(NatTableLayerConfigurations.getCompoositeLayerConfiguration());
    
    NatTable natTable = new NatTable(parent, composite, false);
    
    if( params.getAutoFitColWidthIndices().size() > 0 )
      registerAutoResizeColCmdHandler(natTable, composite, bodyLayerStack, params.getAutoFitColWidthIndices());
    
    setNatTableContentTooltip(natTable);
    
    natTable.setConfigRegistry(configRegistry);
   
    natTable.addConfiguration(new SingleClickSortConfiguration());
    
    natTable.addConfiguration(new DefaultNatTableStyleConfiguration());

    setNatTableContextMenu(natTable, openableParts);
    
    natTable.addConfiguration(NatTableLayerConfigurations.getNatTableConfiguration());        
    
    //natTable.addConfiguration(NatTableLayerConfigurations.getCustomConvertConfiguration(bodyDataLayer));
    
    natTable.configure();

    ...

    NatTableContentProvider.addNatTableData(natTable, bodyLayerStack.getSelectionLayer(), bodyLayerStack.getBodyDataProvider());
    
    return natTable;
  }
}

然后：

public class NatTableLayerConfigurations
{
  ...

  public static AbstractRegistryConfiguration getNatTableConfiguration()
  {
    return new AbstractRegistryConfiguration()
    {

      @Override
      public void configureRegistry(IConfigRegistry configRegistry)
      {
        ...    
        Style cellAlignStyle = new Style();
        cellAlignStyle.setAttributeValue(CellStyleAttributes.HORIZONTAL_ALIGNMENT, HorizontalAlignmentEnum.RIGHT);
        configRegistry.registerConfigAttribute(CellConfigAttributes.CELL_STYLE, cellAlignStyle, DisplayMode.NORMAL, NatTableFactory.DataTypeNumberLabel);
        //
        configRegistry.registerConfigAttribute(
            CellConfigAttributes.DISPLAY_CONVERTER,
            new DefaultDoubleDisplayConverter(), DisplayMode.NORMAL,
            NatTableFactory.DataTypeNumberLabel);
        System.out.println("configRegistry.registerConfigAttribute CellConfigAttributes.DISPLAY_CONVERTER");
        
        ...
      }
    };
  }
}

和：

public class BodyLayerStack extends AbstractLayerTransform
{
  ...    
  public BodyLayerStack(List<TableLine> values, int columnCount, Integer[] columnIndicesForRowHeaders)
  {
    EventList<TableLine> eventList = GlazedLists.eventList(values);
    TransformedList<TableLine, TableLine> rowObjectsGlazedList = GlazedLists.threadSafeList(eventList);

    sortedList = new SortedList<>(rowObjectsGlazedList, null);
    // wrap the SortedList with the FilterList
    filterList = new FilterList<>(sortedList);
    
    bodyDataProvider = new ListDataProvider<TableLine>(filterList, getColumnAccessor(columnCount));
    bodyDataLayer = new DataLayer(bodyDataProvider);

    IConfigLabelAccumulator cellLabelAccumulator = new IConfigLabelAccumulator() {
      
      @Override
      public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {
        int columnIndex = bodyDataLayer.getColumnIndexByPosition(columnPosition);
        int rowIndex = bodyDataLayer.getRowIndexByPosition(rowPosition);
        if( isRowHeader(columnIndicesForRowHeaders, columnIndex) ) {
          configLabels.addLabel(NatTableFactory.RowHeaderLabel);
        } else {
          configLabels.addLabel(filterList.get(rowIndex).getObjectTypeByColumn(columnIndex));
          
          // NatTableLayerConfigurations.getNatTableConfiguration();
        }
      }
    };
    bodyDataLayer.setConfigLabelAccumulator(cellLabelAccumulator);
    
    GlazedListsEventLayer<TableLine> glazedListsEventLayer = new GlazedListsEventLayer<>(bodyDataLayer, filterList);
    
    ...    
  }
}

我检查了各种示例，但我看不到，我错过了什么。以及如何检查单元格中的数据是否正确转换？感谢您的提示。

Answer 1

我想您缺少排序比较器的配置。

这在我们的文档中有解释：https://www.eclipse.org/nattable/documentation.php?page=sorting

下面的例子展示了用法：

• SortableGridExample
• GroupByCustomTypesExample