Howto render Grid Cell with data from two fields?

In GXT2 I used to have a ListStore of a model containing the fields "unit" and "value". Then I created a Grid using the ListStore and a ColumnModel. The ColumnModel had a ColumnConfig for the "value" field. This ColumnConfig got a Renderer for showing "unit" next to "value" in that column.

GXT 2 - Code

Code:

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        List<ColumnConfig> configs = new ArrayList<ColumnConfig>();

        ColumnConfig valueColumn = new ColumnConfig("value", "value", 100);
        valueColumn.setAlignment(HorizontalAlignment.RIGHT);
        valueColumn.setRenderer(unitRenderer);
        configs.add(valueColumn);

        ColumnModel cm = new ColumnModel(configs);

        Grid<MyModel> grid = new Grid<MyModel>(ingrStore, cm);

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With the unitRenderer being:

Code:

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public static final GridCellRenderer<MyModel> unitRenderer = new GridCellRenderer<MyModel>() {
        @Override
        public Object render(MyModel model, String property, ColumnData config, int rowIndex, int colIndex,
                ListStore<MyModel> store, Grid<MyModel> grid) {
            Double value = model.get(property);
            if (value == null) {
                return "";
            }
            String unit = model.getUnit();
            return value.toString() + " " + unit;
        }
    };

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Question: How to accomplish this in GXT3?

I know about setCell() and the render-Method there. But Model, Store and Grid aren't accessible over there.

What I got so far (GXT 3):

Code:

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ColumnConfig<MyModel, Double> valueColumn= new ColumnConfig<MyModel, Double>(props.value(), 100, "value");

valueColumn.setCell(new PropertyDisplayCell<Double>(new DoublePropertyEditor(numberFormat)) {

    @Override
    public void render(com.google.gwt.cell.client.Cell.Context context, Double value, SafeHtmlBuilder sb) {

        String unit = "unit";//FIXME: How to get unit out of model here?

        sb.appendHtmlConstant("<span>" + value.toString() + " " + unit + "</span>");      }

    });

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You can get the model from your list store using the context.

Code:

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column.setCell(new AbstractCell<Long>() {
    @Override
    public void render(Context context, Long value, SafeHtmlBuilder sb) {
        model = store.get(context.getIndex());
        ...
    }
});

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You could also make the Cell generic on the Model itself, and use the

Code:

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ColumnConfig<MyModel, MyModel> column =
    new ColumnConfig<MyModel, MyModel>(new IdentityValueProvider<MyModel>() ...);
column.setCell(new AbstractCell<MyModel>() {
  @Override
  public void render(Cell.Context context, MyModel value, SafeHtmlBuilder sb) {
    //render with the whole value, invoking any getter you wish
  }
});

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