Essai Task et MVC avec JavaFx
Bonjour,
J'ai essayé de reprendre un exemple du livre JavaFX8 Introduction by Example (à la page 119) ou sur GitHub à l'adresse suivante :
https://github.com/Apress/javafx-8-i...dProcesses.zip
ça marche bien .
Ensuite j'ai voulu le transformer pour créer un MVC avec une partie FXML et la les problèmes arrivent :
Mes boutons ne sont plus gérés correctement et génèrent des erreurs :
Voici mon Controleur :"SampleControler"
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| package application;
import java.net.URL;
import java.util.Random;
import java.util.ResourceBundle;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.ProgressBar;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.TextArea;
public class SampleController
{
static Task copyWorker;
final int numFiles = 30;
@FXML
private URL location;
@FXML
private ResourceBundle resources;
@FXML
private Button Start;
@FXML
private Button Cancel;
@FXML
private TextArea textArea;
@FXML
private ProgressBar progressBar;
@FXML
private ProgressIndicator progressIndicator;
public SampleController()
{
}
@FXML
private void initialize()
{
}
@FXML
private void Startbutton() {
Start.setDisable(true);
progressBar.setProgress(0);
progressIndicator.setProgress(0);
textArea.setText("");
Cancel.setDisable(false);
copyWorker = createWorker(numFiles);
// wire up progress bar
progressBar.progressProperty().unbind();
progressBar.progressProperty().bind(copyWorker.progressProperty());
progressIndicator.progressProperty().unbind();
progressIndicator.progressProperty().bind(copyWorker.progressProperty());
// append to text area box
copyWorker.messageProperty().addListener((ObservableValue<? extends String> observable, String oldValue, String newValue) -> {
textArea.appendText(newValue + "\n");});
new Thread(copyWorker).start();
}
@FXML
private void Cancelbutton() {
Start.setDisable(false);
Cancel.setDisable(true);
copyWorker.cancel(true);
// reset
progressBar.progressProperty().unbind();
progressBar.setProgress(0);
progressIndicator.progressProperty().unbind();
progressIndicator.setProgress(0);
textArea.appendText("File transfer was cancelled.");
}
private Task createWorker(final int numFiles) {
return new Task() {
@Override
protected Object call() throws Exception {
for (int i = 0; i < numFiles; i++) {
long elapsedTime = System.currentTimeMillis();
copyFile("some file", "some dest file");
elapsedTime = System.currentTimeMillis() - elapsedTime;
String status = elapsedTime + " milliseconds";
// queue up status
updateMessage(status);
updateProgress(i + 1, numFiles); // (progress, max)
}
return true;
}
};
}
private void copyFile(String src, String dest) throws InterruptedException {
// simulate a long time
Random rnd = new Random(System.currentTimeMillis());
long millis = rnd.nextInt(1000);
Thread.sleep(millis);
}
} |
Mon XML :Sample.fxml
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| <?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ProgressBar?>
<?import javafx.scene.control.ProgressIndicator?>
<?import javafx.scene.control.TextArea?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.Pane?>
<BorderPane xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.SampleController">
<bottom>
<Pane prefHeight="200.0" prefWidth="1072.0" BorderPane.alignment="CENTER">
<children>
<Button id="Start" layoutX="59.0" layoutY="59.0" mnemonicParsing="false" onAction="#Startbutton" prefHeight="25.0" prefWidth="52.0" text="Start" />
<Button id="Cancel" layoutX="59.0" layoutY="123.0" mnemonicParsing="false" onAction="#Cancelbutton" text="Cancel" />
<ProgressBar id="progressBar" layoutX="223.0" layoutY="63.0" prefWidth="200.0" progress="0.0" />
<TextArea id="textArea" layoutX="223.0" layoutY="100.0" prefHeight="65.0" prefWidth="200.0" />
<ProgressIndicator id="progressIndicator" layoutX="458.0" layoutY="43.0" progress="0.0" />
</children>
</Pane>
</bottom>
</BorderPane> |
et mon affichage javafx: "Main"
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| package application;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.fxml.FXMLLoader;
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
try {
BorderPane root = (BorderPane)FXMLLoader.load(getClass().getResource("Sample.fxml"));
Scene scene = new Scene(root,800,400);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
} |
En attente de vos réponses et de vous lire
Bien Cdt 8O
