How to change tableView row color when some conditions are valid (javaFX)

Question

My application contains:

• An arraylist of integers. this list update every few second (numbers are added and other are deleted)

• Tableview<Data>

• the Data contains several fields and semNumId field (which is integer)

• I want to be able to paint the rows, which the arraylist contains the semNumId numbers with green colour.

• the arraylist may be change (and the tableview data will contain the same data). so the green colour may be set on and off without changing the table data

I have look here:

JavaFx How to set row background color of specifics rows in TableView

but seems it doesn't help much.

How can I implement this ?

pay attention that:

tableView.setRowFactory(tv -> {
    TableRow<Data> row = new TableRow<>();

create new tableRow which I cant check if it's semNumId in the list (because when creating with new operation the default is 0);

Please add example code

Answer 1

Not sure if I understood you correctly...

private final ObservableList<Integer> numbers = FXCollections.observableArrayList<>();
private final BooleanProperty numbersChanged = new SimpleBooleanProperty(false);

numbers.addListener(new ListChangeListener<Number> {
        @Override public void onChanged(Change<? extends Number> c) {
            numbersChanged.set(true);
        }
    });

tableView.setRowFactory(tv -> {
    TableRow<Data> row = new TableRow<>();
    BooleanBinding contains = Bindings.createBooleanBinding(() -> {
        if (numberChanged.get()) {
            if (!numbers.isEmpty() && row.getItem() != null && numbers.contains(row.getItem().getSemNumId())) {
                return true;
            }
            numberChanged.set(false);
        }

        return false;
    }, row.itemProperty(), numbersChanged);
    row.styleProperty().bind(Bindings.when(contains)
        .then("-fx-background-color: green;")
        .otherwise(""));
    return row;
    });

This implementation assumes that your Data object will not change its value (semNumId) at runtime (i.e. immutable).