How to get TableHeaderRow from TableView nowadays in JavaFX?

Question

I saw examples on how to get table header in many places with code

TableHeaderRow header = (TableHeaderRow) tableView.lookup("TableHeaderRow");

like here: How to prevent TableView from doing TableColumn re-order in javaFX 8?

But this code returns null for me.

How to reach TableHeaderRow then?

Gannie

Answer 1

The TableHeaderRow is created by the Skin and the default Skin is not created until css is applied.

You could call applyCss after adding the TableView to a Scene and access the TableHeaderRow after this call.

Alternatively listen for changes in the Skin and execute that code after the skin has been set.

Furthermore I'd recommend using TableViewSkinBase.getTableHeaderRow to retrieve the header row instead of using lookup (you're using com.sun packages anyway).

tableView.skinProperty().addListener((a, b, newSkin) -> {
    TableHeaderRow headerRow = ((TableViewSkinBase) newSkin).getTableHeaderRow();
    ...
});

Willard

If I am not mistaken the getTableHeaderRow method is no longer visible in JavaFX11 – Choli

Answer 2

lookup("TableHeaderRow"); works, but it needs called after the table is rendered or it will return null

Carnot