How to get event source from value property changed handler?

Question

I am relatively new to JavaFX, so perhaps this is an easy question to answer. I am creating in Java code several (e.g., 5) ChoiceBox instances. I add a handler for when the value of the ChoiceBox changes. My code:
ChoiceBox<String> rpmSelector = new ChoiceBox<>();
ObservableList<String> rpmSelectorItems = FXCollections.observableArrayList();
rpmSelectorItems.add(ALL_RPM);
for (Double engSpeed : engSpeeds) {
    rpmSelectorItems.add(String.format("%.0f", engSpeed.doubleValue()));
rpmSelector.setItems(rpmSelectorItems);
rpmSelector.getSelectionModel().selectFirst();
rpmSelector.valueProperty().addListener(new ChangeListener<String>() {
    @Override
    public void changed(ObservableValue<? extends String> obsValue,
            String oldValue, String newValue) {
       // How can I get the ChoiceBox that was the source of this event?
});My question is: in the "changed" method, how do I determine which of the ChoiceBox instances had its value changed?
Thanks!
Chris
Edited by: 976245 on May 15, 2013 1:05 PM
Edited by: 976245 on May 15, 2013 1:05 PM

Answer 1

     My question is: in the "changed" method, how do I determine which of the ChoiceBox instances had its value changed?You have only one ChoiceBox control. Probably you want to get the selected item. If it is the case you can get it through selectedItemProperty(),
selectedIndexProperty(), and valueProperty()
        rpmSelector.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<String>() {
            public void changed(ObservableValue<? extends String> ov, String old_val, String new_val) {
                System.out.println("Selected item is: " + new_val);
        rpmSelector.getSelectionModel().selectedIndexProperty().addListener(new ChangeListener<Number>() {
            @Override
            public void changed(ObservableValue<? extends Number> observableValue, Number oldv, Number newv) {
                System.out.println("Selected index is: " + newv.intValue());
        rpmSelector.valueProperty().addListener(new ChangeListener<String>() {
            public void changed(ObservableValue<? extends String> ov, String old_val, String new_val) {
                System.out.println("Selected   value: " + new_val);
        });