Comment charger le contenu de JavaFX onglets de façon dynamique?

Ok, si je vous ai bien compris, voici ma suggestion de Victoria;

Supposons que l'application principale FXML contient TabPane quelque part en elle:

//other controls
<TabPane fx:id="tabPane" id="tabPane">
   <tabs>
   </tabs>
</TabPane>
//other controls

Dans le contrôleur principal:

//TabPane in fxml
@FXML
private TabPane tabPane;
//The FXMLLoader
private FXMLLoader fXMLLoader = new FXMLLoader();
//City list fetched from server
private String[] cityList = {"Moscow", "Stambul", "New York", "Bishkek"};
//OPTIONAL : Map for "city name - city fxml controller" pairs
private Map<String, Object> cityControllerMap = new HashMap<String, Object>();
//Belows are in init method
//Add only tabs dynamically but not their content
for (String city : cityList) {
tabPane.getTabs().add(new Tab(city));
}
//It is important to call it before adding ChangeListener to the tabPane to avoid NPE and
//to be able fire the manual selection event below. Otherwise the 1st tab will be selected
//with empty content.
tabPane.getSelectionModel().clearSelection();
//Add Tab ChangeListener
tabPane.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {
@Override
public void changed(ObservableValue<? extends Tab> observable, Tab oldValue, Tab newValue) {
System.out.println("Tab selected: " + newValue.getText());
if (newValue.getContent() == null) {
try {
//Loading content on demand
Parent root = (Parent) fXMLLoader.load(this.getClass().getResource(newValue.getText() + ".fxml").openStream());
newValue.setContent(root);
//OPTIONAL : Store the controller if needed
cityControllerMap.put(newValue.getText(), fXMLLoader.getController());
} catch (IOException ex) {
ex.printStackTrace();
}
} else {
//Content is already loaded. Update it if necessary.
Parent root = (Parent) newValue.getContent();
//Optionally get the controller from Map and manipulate the content
//via its controller.
}
}
});
//By default, select 1st tab and load its content.
tabPane.getSelectionModel().selectFirst();

Si vous décidez de stocker les contrôleurs, vous pouvez définir un contrôleur pour chaque ville fxml ou de ne définir qu'une seule classe de contrôleur pour le tout et de le définir comme fXMLLoader.setController(new CommonCityController()); avant le chargement de la ville de fichier fxml.

HTH.

OriginalL'auteur Uluk Biy