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Créer une nouvelle fenêtre

Pour afficher du contenu dans une nouvelle fenêtre, une Stage doit être créée. Après la création et l'initialisation, show ou showAndWait doit être appelé sur l'objet Stage : 

// create sample content
Rectangle rect = new Rectangle(100, 100, 200, 300);
Pane root = new Pane(rect);
root.setPrefSize(500, 500);

Parent content = root;

// create scene containing the content
Scene scene = new Scene(content);

Stage window = new Stage();
window.setScene(scene);

// make window visible
window.show();

Remarque: Ce code doit être exécuté sur le thread d'application JavaFX.

Création d'une boîte de dialogue personnalisée

Vous pouvez créer des boîtes de dialogue personnalisées contenant de nombreux composants et y exécuter de nombreuses fonctionnalités. Il se comporte comme une deuxième étape sur la scène du propriétaire.
Dans l'exemple suivant, une application qui affiche une personne dans la tableview de la scène principale et crée une personne dans une boîte de dialogue (AddingPersonDialog) préparée. Les interfaces graphiques créées par SceneBuilder, mais elles peuvent être créées par des codes java purs.

Exemple d'application:

AppMain.java 

package customdialog;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class AppMain extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
        Scene scene = new Scene(root, 500, 500);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

}

AppMainController.java 

package customdialog;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class AppMainController implements Initializable {

    @FXML
    private TableView<Person> tvData;
    @FXML
    private TableColumn colId;
    @FXML
    private TableColumn colName;
    @FXML
    private TableColumn colAge;

    private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();

    @FXML
    void onOpenDialog(ActionEvent event) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
        Parent parent = fxmlLoader.load();
        AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
        dialogController.setAppMainObservableList(tvObservableList);

        Scene scene = new Scene(parent, 300, 200);
        Stage stage = new Stage();
        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setScene(scene);
        stage.showAndWait();
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        colId.setCellValueFactory(new PropertyValueFactory<>("id"));
        colName.setCellValueFactory(new PropertyValueFactory<>("name"));
        colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
        tvData.setItems(tvObservableList);
    }

}

AppMain.fxml 

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>

<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
   <children>
      <VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
         <children>
            <Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
            <TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
              <columns>
                <TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
                <TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
                  <TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
              </columns>
               <columnResizePolicy>
                  <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
               </columnResizePolicy>
            </TableView>
         </children>
      </VBox>
   </children>
</AnchorPane>

AddPersonDialogController.java 

package customdialog;

import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class AddPersonDialogController  {
    
    @FXML
    private TextField tfId;

    @FXML
    private TextField tfName;

    @FXML
    private TextField tfAge;
    
    private ObservableList<Person> appMainObservableList;

    @FXML
    void btnAddPersonClicked(ActionEvent event) {
        System.out.println("btnAddPersonClicked");
        int id = Integer.valueOf(tfId.getText().trim());
        String name = tfName.getText().trim();
        int iAge = Integer.valueOf(tfAge.getText().trim());
        
        Person data = new Person(id, name, iAge);
        appMainObservableList.add(data);
        
        closeStage(event);
    }

    public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
        this.appMainObservableList = tvObservableList;
        
    }

    private void closeStage(ActionEvent event) {
        Node  source = (Node)  event.getSource(); 
        Stage stage  = (Stage) source.getScene().getWindow();
        stage.close();
    }

}

AddPersonDialog.fxml 

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>

<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
   <children>
      <VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
         <children>
            <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
                  <TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
                  <TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
                  <TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER_RIGHT">
               <children>
                  <Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
               </children>
               <opaqueInsets>
                  <Insets />
               </opaqueInsets>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
         </children>
      </VBox>
   </children>
</AnchorPane>

Person.java 

package customdialog;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;

public class Person {

    private SimpleIntegerProperty id;
    private SimpleStringProperty name;
    private SimpleIntegerProperty age;

    public Person(int id, String name, int age)  {
        this.id = new SimpleIntegerProperty(id);
        this.name = new SimpleStringProperty(name);
        this.age = new SimpleIntegerProperty(age);
    }

    public int getId() {
        return id.get();
    }

    public void setId(int ID) {
        this.id.set(ID);
    }

    public String getName() {
        return name.get();
    }

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

    public int getAge() {
        return age.get();
    }

    public void setAge(int age) {
        this.age.set(age);
    }

    @Override
    public String toString() {
        return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
    }

}

Capture d'écran entrer la description de l'image ici

Création d'une boîte de dialogue personnalisée

Vous pouvez créer des boîtes de dialogue personnalisées contenant de nombreux composants et y exécuter de nombreuses fonctionnalités. Il se comporte comme une deuxième étape sur la scène du propriétaire.
Dans l'exemple suivant, une application qui affiche une personne dans la tableview de la scène principale et crée une personne dans une boîte de dialogue (AddingPersonDialog) préparée. Les interfaces graphiques créées par SceneBuilder, mais elles peuvent être créées par des codes java purs.

Exemple d'application:

AppMain.java 

package customdialog;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class AppMain extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
        Scene scene = new Scene(root, 500, 500);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

}

AppMainController.java 

package customdialog;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class AppMainController implements Initializable {

    @FXML
    private TableView<Person> tvData;
    @FXML
    private TableColumn colId;
    @FXML
    private TableColumn colName;
    @FXML
    private TableColumn colAge;

    private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();

    @FXML
    void onOpenDialog(ActionEvent event) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
        Parent parent = fxmlLoader.load();
        AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
        dialogController.setAppMainObservableList(tvObservableList);

        Scene scene = new Scene(parent, 300, 200);
        Stage stage = new Stage();
        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setScene(scene);
        stage.showAndWait();
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        colId.setCellValueFactory(new PropertyValueFactory<>("id"));
        colName.setCellValueFactory(new PropertyValueFactory<>("name"));
        colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
        tvData.setItems(tvObservableList);
    }

}

AppMain.fxml 

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>

<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
   <children>
      <VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
         <children>
            <Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
            <TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
              <columns>
                <TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
                <TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
                  <TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
              </columns>
               <columnResizePolicy>
                  <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
               </columnResizePolicy>
            </TableView>
         </children>
      </VBox>
   </children>
</AnchorPane>

AddPersonDialogController.java 

package customdialog;

import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class AddPersonDialogController  {
    
    @FXML
    private TextField tfId;

    @FXML
    private TextField tfName;

    @FXML
    private TextField tfAge;
    
    private ObservableList<Person> appMainObservableList;

    @FXML
    void btnAddPersonClicked(ActionEvent event) {
        System.out.println("btnAddPersonClicked");
        int id = Integer.valueOf(tfId.getText().trim());
        String name = tfName.getText().trim();
        int iAge = Integer.valueOf(tfAge.getText().trim());
        
        Person data = new Person(id, name, iAge);
        appMainObservableList.add(data);
        
        closeStage(event);
    }

    public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
        this.appMainObservableList = tvObservableList;
        
    }

    private void closeStage(ActionEvent event) {
        Node  source = (Node)  event.getSource(); 
        Stage stage  = (Stage) source.getScene().getWindow();
        stage.close();
    }

}

AddPersonDialog.fxml 

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>

<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
   <children>
      <VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
         <children>
            <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
                  <TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
                  <TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
               <children>
                  <Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
                  <TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
               </children>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
            <HBox alignment="CENTER_RIGHT">
               <children>
                  <Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
               </children>
               <opaqueInsets>
                  <Insets />
               </opaqueInsets>
               <padding>
                  <Insets right="30.0" />
               </padding>
            </HBox>
         </children>
      </VBox>
   </children>
</AnchorPane>

Person.java 

package customdialog;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;

public class Person {

    private SimpleIntegerProperty id;
    private SimpleStringProperty name;
    private SimpleIntegerProperty age;

    public Person(int id, String name, int age)  {
        this.id = new SimpleIntegerProperty(id);
        this.name = new SimpleStringProperty(name);
        this.age = new SimpleIntegerProperty(age);
    }

    public int getId() {
        return id.get();
    }

    public void setId(int ID) {
        this.id.set(ID);
    }

    public String getName() {
        return name.get();
    }

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

    public int getAge() {
        return age.get();
    }

    public void setAge(int age) {
        this.age.set(age);
    }

    @Override
    public String toString() {
        return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
    }

}

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Modified text is an extract of the original Stack Overflow Documentation
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