Le Tutoriel de JavaFX ProgressBar et ProgressIndicator
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ProgressBar et ProgressIndicator sont les éléments d'interface qui décrivent visuellement la progression des opérations de vos applications JavaFX.

ProgressBar et ProgressIndicator avec la charge de travail à déterminer :

L'exemple ci-dessous crée un ProgressBar et un ProgressIndicator simule un processus qui ne détermine pas l'heure de la fin.

ProgressDemo.java
package org.o7planning.javafx.progress; import javafx.application.Application; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.ProgressBar; import javafx.scene.control.ProgressIndicator; import javafx.scene.layout.FlowPane; import javafx.stage.Stage; public class ProgressDemo extends Application { @Override public void start(Stage stage) { ProgressBar progressBar = new ProgressBar(); ProgressIndicator progressIndicator = new ProgressIndicator(); FlowPane root = new FlowPane(); root.setPadding(new Insets(10)); root.setHgap(10); root.getChildren().addAll(progressBar, progressIndicator); Scene scene = new Scene(root, 400, 300); stage.setTitle("JavaFX ProgressBar & ProgressIndicator (o7planning.org)"); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(args); } }
Vous pouvez créer un objet Tâche (Task) pour effectuer une certaine tâche, telle que la copie de la liste des fichiers. La copie prend de temps, vous devez utiliser ProgressBar ou ProgressIndicator pour afficher le pourcentage de travail déjà effectué.

ProgressAndTaskDemo.java
package org.o7planning.javafx.progress; import java.io.File; import java.util.List; import javafx.application.Application; import javafx.concurrent.WorkerStateEvent; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.control.ProgressBar; import javafx.scene.control.ProgressIndicator; import javafx.scene.layout.FlowPane; import javafx.scene.paint.Color; import javafx.stage.Stage; public class ProgressAndTaskDemo extends Application { private CopyTask copyTask; @Override public void start(Stage primaryStage) { final Label label = new Label("Copy files:"); final ProgressBar progressBar = new ProgressBar(0); final ProgressIndicator progressIndicator = new ProgressIndicator(0); final Button startButton = new Button("Start"); final Button cancelButton = new Button("Cancel"); final Label statusLabel = new Label(); statusLabel.setMinWidth(250); statusLabel.setTextFill(Color.BLUE); // Start Button. startButton.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { startButton.setDisable(true); progressBar.setProgress(0); progressIndicator.setProgress(0); cancelButton.setDisable(false); // Create a Task. copyTask = new CopyTask(); // Unbind progress property progressBar.progressProperty().unbind(); // Bind progress property progressBar.progressProperty().bind(copyTask.progressProperty()); // Hủy bỏ kết nối thuộc tính progress progressIndicator.progressProperty().unbind(); // Bind progress property. progressIndicator.progressProperty().bind(copyTask.progressProperty()); // Unbind text property for Label. statusLabel.textProperty().unbind(); // Bind the text property of Label // with message property of Task statusLabel.textProperty().bind(copyTask.messageProperty()); // When completed tasks copyTask.addEventHandler(WorkerStateEvent.WORKER_STATE_SUCCEEDED, // new EventHandler<WorkerStateEvent>() { @Override public void handle(WorkerStateEvent t) { List<File> copied = copyTask.getValue(); statusLabel.textProperty().unbind(); statusLabel.setText("Copied: " + copied.size()); } }); // Start the Task. new Thread(copyTask).start(); } }); // Cancel cancelButton.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { startButton.setDisable(false); cancelButton.setDisable(true); copyTask.cancel(true); progressBar.progressProperty().unbind(); progressIndicator.progressProperty().unbind(); statusLabel.textProperty().unbind(); // progressBar.setProgress(0); progressIndicator.setProgress(0); } }); FlowPane root = new FlowPane(); root.setPadding(new Insets(10)); root.setHgap(10); root.getChildren().addAll(label, progressBar, progressIndicator, // statusLabel, startButton, cancelButton); Scene scene = new Scene(root, 500, 120, Color.WHITE); primaryStage.setTitle("ProgressBar & ProgressIndicator"); primaryStage.setScene(scene); primaryStage.show(); } public static void main(String[] args) { Application.launch(args); } }
CopyTask.java
package org.o7planning.javafx.progress; import java.io.File; import java.util.ArrayList; import java.util.List; import javafx.concurrent.Task; // Copy all file in C:/Windows public class CopyTask extends Task<List<File>> { @Override protected List<File> call() throws Exception { File dir = new File("C:/Windows"); File[] files = dir.listFiles(); int count = files.length; List<File> copied = new ArrayList<File>(); int i = 0; for (File file : files) { if (file.isFile()) { this.copy(file); copied.add(file); } i++; this.updateProgress(i, count); } return copied; } private void copy(File file) throws Exception { this.updateMessage("Copying: " + file.getAbsolutePath()); Thread.sleep(500); } }