Updating current row when clicked upon in TableView JavaFX - javafx

Question

So I have code that works if the user selects a different row than the one currently selected
table.getSelectionModel().selectedItemProperty().addListener(
(observable, oldValue, newValue) -> {
if (newValue == null) {
updateDetails(oldValue);
return;
}
updateDetails(newValue);
});
}
However, I want this to work if the user clicks on the same value as well - basically, there's a part of the code that modifies an image shown but that image doesn't update itself unless I click on another row then go back to the row I was previously on. I would like to be able to update the row I'm on simply by clicking on it (which would call updateDetails) but can't seem to figure this out...

Answer 1

Create a custom rowFactory and add a mouse listener to it.
Example
This displays the old value property of the last item clicked and the new item clicked as text of the Label.
TableView<Item> tv = new TableView<>(FXCollections.observableArrayList(new Item("foo"), new Item("bar"), new Item("42")));
Label label = new Label();
TableColumn<Item, String> valueColumn = new TableColumn<>("value");
valueColumn.setCellValueFactory(d -> d.getValue().valueProperty());
tv.getColumns().add(valueColumn);
EventHandler<MouseEvent> eventHandler = new EventHandler<MouseEvent>() {
private Item lastItem;
#Override
public void handle(MouseEvent event) {
if (event.getButton() == MouseButton.PRIMARY) {
TableRow<Item> source = (TableRow<Item>) event.getSource();
if (!source.isEmpty()) {
label.setText(MessageFormat.format("old: {0}; new: {1}", lastItem == null ? null : lastItem.getValue(), (lastItem = source.getItem()).getValue()));
}
}
}
};
tv.setRowFactory(t -> {
TableRow<Item> row = new TableRow();
row.setOnMouseClicked(eventHandler);
return row;
});
public class Item {
public Item() {
}
public Item(String value) {
this.value.set(value);
}
private final StringProperty value = new SimpleStringProperty();
public String getValue() {
return value.get();
}
public void setValue(String val) {
value.set(val);
}
public StringProperty valueProperty() {
return value;
}
}