Le Tutoriel de JavaFX Spinner

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1- JavaFX Spinner

Spinner est similaire à ComboBox ou List, qui permet aux utilisateurs de choisir de l'ensemble de valeurs. Semblable à ComboBox peut modifier, Spinner permet également aux utilisateurs d'ajouter des valeur. Contrairement ComboBox, Spinner aucune liste déroulante, il ne affiche pas la liste des valeurs possibles, à un moment donné, il affiche juste un valeur actuelle. Il est souvent utilisé ramplacer pour ComboBox ou List lorsque l'ensemble de valeurs peut être très grande.
 
La structure de Spinner:

2- Exemple avec Spinner

L'exemple simple ci-dessous illustre un Spinner avec des valeurs numériques.
SpinnerDemo.java
package org.o7planning.javafx.spinner;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Spinner;
import javafx.scene.control.SpinnerValueFactory;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class SpinnerDemo extends Application {

    @Override
    public void start(Stage stage) {

        Label label = new Label("Select Level:");
        final Spinner<Integer> spinner = new Spinner<Integer>();

        final int initialValue = 3;

        // Value factory.
        SpinnerValueFactory<Integer> valueFactory = //
                new SpinnerValueFactory.IntegerSpinnerValueFactory(1, 5, initialValue);

        spinner.setValueFactory(valueFactory);

        FlowPane root = new FlowPane();
        root.setHgap(10);
        root.setVgap(10);
        root.setPadding(new Insets(10));

        root.getChildren().addAll(label, spinner);

        Scene scene = new Scene(root, 400, 200);

        stage.setTitle("JavaFX Spinner (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}
Exemple 2:
SpinnerDemo2.java
package org.o7planning.javafx.spinner;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Spinner;
import javafx.scene.control.SpinnerValueFactory;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class SpinnerDemo2 extends Application {

   @Override
   public void start(Stage stage) {

       Label label = new Label("Select Month:");

       ObservableList<String> months = FXCollections.observableArrayList(//
               "January", "February", "March", "April", //
               "May", "June", "July", "August", //
               "September", "October", "November", "December");

       final Spinner<String> spinner = new Spinner<String>();

       // Value factory.
       SpinnerValueFactory<String> valueFactory = //
               new SpinnerValueFactory.ListSpinnerValueFactory<String>(months);
     
       // Default value
       valueFactory.setValue("February");

       spinner.setValueFactory(valueFactory);

       FlowPane root = new FlowPane();
       root.setHgap(10);
       root.setVgap(10);
       root.setPadding(new Insets(10));

       root.getChildren().addAll(label, spinner);

       Scene scene = new Scene(root, 400, 200);

       stage.setTitle("JavaFX Spinner (o7planning.org)");
       stage.setScene(scene);
       stage.show();
   }

   public static void main(String[] args) {
       Application.launch(args);
   }

}

3- Spinner et Styles

JavaFX Spinner peut définir la position et la direction des touches fléchées, si non spécifié, la valeur par défaut est la direction droit et la direction verticale.
SpinnerStyleDemo.java
package org.o7planning.javafx.spinner;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Spinner;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class SpinnerStyleDemo extends Application {

    @Override
    public void start(Stage stage) {

        String[] styleClasses = new String[] { "", // Default.
                Spinner.STYLE_CLASS_ARROWS_ON_RIGHT_HORIZONTAL, //
                Spinner.STYLE_CLASS_ARROWS_ON_LEFT_VERTICAL, //
                Spinner.STYLE_CLASS_ARROWS_ON_LEFT_HORIZONTAL, //
                Spinner.STYLE_CLASS_SPLIT_ARROWS_VERTICAL, //
                Spinner.STYLE_CLASS_SPLIT_ARROWS_HORIZONTAL

        };

        FlowPane root = new FlowPane();
        root.setHgap(10);
        root.setVgap(10);
        root.setPadding(new Insets(10));

        for (String styleClass : styleClasses) {
            Spinner<Integer> spinner = new Spinner<Integer>(1, 20, 10);
            spinner.getStyleClass().add(styleClass);
            root.getChildren().add(spinner);
        }

        Scene scene = new Scene(root, 400, 200);

        stage.setTitle("JavaFX Spinner (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}

4- Spinner et ChangeEvent

Habituellement, les Spinner utilisés pour afficher des valeurs numériques. Cependant, vous pouvez également utiliser pour afficher un certain objet. L'exemple ci-dessous Spinner contient un ensemble d'objets Language, et gère les événements lorsque la valeur de Spinner change .
 
SpinnerChangeEventDemo.java
package org.o7planning.javafx.spinner;

import java.util.ArrayList;
import java.util.List;

import org.o7planning.javafx.model.Language;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Spinner;
import javafx.scene.control.SpinnerValueFactory;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class SpinnerChangeEventDemo extends Application {

    @Override
    public void start(Stage stage) {

        Language vietnamese = new Language("vi", "Vietnamese", "Xin Chao");
        Language english = new Language("en", "English", "Hello");
        Language russian = new Language("ru", "Russian", "привет");

        List<Language> languages = new ArrayList<Language>();
        languages.add(vietnamese);
        languages.add(english);
        languages.add(russian);

        //
        
        Label label = new Label("Select Language:");
        final Spinner<Language> spinner = new Spinner<Language>();

        Label labelMessage = new Label("?");

        // Value factory.
        SpinnerValueFactory<Language> valueFactory = //
                new SpinnerValueFactory<Language>() {

                    @Override
                    public void decrement(int steps) {
                        Language current = this.getValue();
                        int idx = languages.indexOf(current);
                        int newIdx = (languages.size() + idx - steps) % languages.size();
                        Language newLang = languages.get(newIdx);
                        this.setValue(newLang);
                    }

                    @Override
                    public void increment(int steps) {
                        Language current = this.getValue();
                        int idx = languages.indexOf(current);
                        int newIdx = (idx + steps) % languages.size();
                        Language newLang = languages.get(newIdx);
                        this.setValue(newLang);
                    }

                };

        // Default value for Spinner
        valueFactory.setValue(vietnamese);

        spinner.setValueFactory(valueFactory);

        // When spinner change value.
        spinner.valueProperty().addListener(new ChangeListener<Language>() {

            @Override
            public void changed(ObservableValue<? extends Language> observable,//
                    Language oldValue, Language newValue) {
                
                labelMessage.setText("Greeting: "+ newValue.getGreeting());

            }
        });

        FlowPane root = new FlowPane();
        root.setHgap(10);
        root.setVgap(10);
        root.setPadding(new Insets(10));

        root.getChildren().addAll(label, spinner, labelMessage);

        Scene scene = new Scene(root, 400, 200);

        stage.setTitle("JavaFX Spinner (o7planning.org)");
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }

}
Language.java
package org.o7planning.javafx.model;

public class Language {

    private String code;
    private String name;
    private String greeting;

    public Language() {

    }

    public Language(String code, String name) {
        this.code = code;
        this.name = name;
    }

    public Language(String code, String name, String greeting) {
        this.code = code;
        this.name = name;
        this.greeting = greeting;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGreeting() {
        return greeting;
    }

    public void setGreeting(String greeting) {
        this.greeting = greeting;
    }

    @Override
    public String toString() {
        return this.name;
    }

}

5- Spinner peut modifier 

L'utilisateur peut ajouter de nouvelles valeurs à Spinner, l'exemple ci-dessous illustre que l'utilisateur entre la valeur et appuie sur Entrée, la valeur sera ajoutée à l'ensemble des valeurs disponibles de Spinner.
SpinnerEditDemo.java
package org.o7planning.javafx.spinner;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Spinner;
import javafx.scene.control.SpinnerValueFactory;
import javafx.scene.control.SpinnerValueFactory.ListSpinnerValueFactory;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;

public class SpinnerEditDemo extends Application {

   @Override
   public void start(Stage stage) {

       Label label = new Label("Select Level:");
       final Spinner<Integer> spinner = new Spinner<Integer>();

       // Editable.
       spinner.setEditable(true);

       // Item List.
       ObservableList<Integer> items = FXCollections.observableArrayList(1, 2, 3);

       // Value Factory:
       SpinnerValueFactory<Integer> valueFactory = //
               new SpinnerValueFactory.ListSpinnerValueFactory<>(items);

       // The converter to convert between text and item object.
       MyConverter converter = new MyConverter();
       valueFactory.setConverter(converter);

       spinner.setValueFactory(valueFactory);

       spinner.getEditor().setOnAction(new EventHandler<ActionEvent>() {

           @Override
           public void handle(ActionEvent event) {
               String text = spinner.getEditor().getText();
               SpinnerValueFactory.ListSpinnerValueFactory<Integer>//
               valueFactory = (ListSpinnerValueFactory<Integer>) spinner.getValueFactory();

               StringConverter<Integer> converter = valueFactory.getConverter();
               Integer enterValue = converter.fromString(text);

               // If the list does not contains 'enterValue'.
               if (!valueFactory.getItems().contains(enterValue)) {
                   // Add new item to list
                   valueFactory.getItems().add(enterValue);
                   // Set to current
                   valueFactory.setValue(enterValue);
               } else {
                   // Set to current
                   valueFactory.setValue(enterValue);
               }

           }
       });

       //
       FlowPane root = new FlowPane();
       root.setHgap(10);
       root.setVgap(10);
       root.setPadding(new Insets(10));

       root.getChildren().addAll(label, spinner);

       Scene scene = new Scene(root, 400, 200);

       stage.setTitle("JavaFX Spinner (o7planning.org)");
       stage.setScene(scene);
       stage.show();
   }

   class MyConverter extends StringConverter<Integer> {

       @Override
       public String toString(Integer object) {
           return object + "";
       }

       @Override
       public Integer fromString(String string) {
           return Integer.parseInt(string);
       }

   }

   public static void main(String[] args) {
       Application.launch(args);
   }

}

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