How display several Vaadin properties in a single table cell?

Question

I have 3 properties of a java class which I require to display below each other in a table cell.

The 3 properties are added to a container which is bound to a table - however, this leads to each property occupying a different cell in the same row.

e.g.
Container container = new IndexedContainer();
container.addContainerProperty("property1", String.class, "dftvalue1");
container.addContainerProperty("property2", String.class, "dftvalue2");
container.addContainerProperty("property3", String.class, "dftvalue3");

container.getContainerProperty(itemId, "property1").setValue("value1");
...
Table table = new Table("My Table");
table.setContainerDataSource(container);

I require to display as below.

---

          |  property1   |
col1      |  property2   |
          |  property3   |

---

Please can you inform/advise how this can be done? Thank you Steve.

Answer 1

You would implement a Table.ColumnGenerator for this. Then create the content for the cell there. The content can be "any" vaadin Component.

Either use e.g. Label with HTML content and concat your props with <br/> (be aware of XSS!). Or you can also create a vertical layout and add a label for each property.

Something like this:

def c = new BeanItemContainer<SomeBean>(SomeBean)
c.addAll([
        new SomeBean(prop1: "prop11", prop2: "prop12", prop3: "prop13"),
        new SomeBean(prop1: "prop21", prop2: "prop22", prop3: "prop23"),
        new SomeBean(prop1: "prop31", prop2: "prop32", prop3: "prop33"),
])
setContent(new Table().with{
    setContainerDataSource(c, [])
    addGeneratedColumn("combined", {Table source, Object itemId, Object columnId ->
        (source.getItem(itemId) as BeanItem<SomeBean>).bean.with{
            // UNSAFE CODE! DON'T USE VERBATIM
            new Label("$it.prop1<br />$it.prop2<br />$it.prop3", ContentMode.HTML)
        }
    })
    setVisibleColumns(["combined"].toArray())
    it
})