JavaFX 控件 Spinner

Spinner

樣式

//最小, 最大, 默認值, 步長
Spinner<Integer> spinner1 = new Spinner<>(0, 10, 5, 2);
Spinner<Double> spinner2 = new Spinner<>(0.0, 10.0, 5, 0.5);
spinner1.setEditable(true);


ObservableList<String> items = FXCollections.observableArrayList();
items.addAll("A", "B", "C", "D", "E");
Spinner<String> spinner3 = new Spinner<>(items);

spinner3.getStyleClass().add(Spinner.STYLE_CLASS_SPLIT_ARROWS_HORIZONTAL);

spinner1.valueProperty().addListener(new ChangeListener<Integer>() {
    @Override
    public void changed(ObservableValue<? extends Integer> observable, Integer oldValue, Integer newValue) {
        System.out.println("observable = " + observable + ", oldValue = " + oldValue + ", newValue = " + newValue);
    }
});

SpinnerValueFactory

Student student1 = new Student("Student1", 10, 1);
Student student2 = new Student("Student2", 11, 2);
Student student3 = new Student("Student3", 12, 3);

ObservableList<Student> students = FXCollections.observableArrayList();
students.addAll(student1, student2, student3);

SpinnerValueFactory<Student> spinnerValueFactory = new SpinnerValueFactory.ListSpinnerValueFactory<>(students);
Spinner<Student> spinner4 = new Spinner<>();

spinnerValueFactory.setConverter(new StringConverter<Student>() {
    @Override
    public String toString(Student object) {
        if (object == null) {
            return "";
        }
        return object.name + "-" + object.id;
    }

    @Override
    public Student fromString(String string) {
        return null;
    }
});
//setValueFactory 要後調用
spinner4.setValueFactory(spinnerValueFactory);