Java examples for JavaFX:ProgressBar
Generating a Background Process
import java.util.Random; import javafx.application.Application; import javafx.beans.value.ChangeListener; import javafx.beans.value.ObservableValue; import javafx.concurrent.Task; import javafx.geometry.Pos; import javafx.scene.Group; 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.control.TextArea; import javafx.scene.layout.BorderPane; import javafx.scene.layout.HBox; import javafx.scene.paint.Color; import javafx.stage.Stage; public class Main extends Application { static Task copyWorker; final int numFiles = 30; public static void main(String[] args) { Application.launch(args);/* ww w. j a v a 2 s . com*/ } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Background Processes"); Group root = new Group(); Scene scene = new Scene(root, 330, 120, Color.WHITE); BorderPane mainPane = new BorderPane(); mainPane.layoutXProperty().bind(scene.widthProperty().subtract(mainPane.widthProperty()).divide(2)); root.getChildren().add(mainPane); final Label label = new Label("Files Transfer:"); final ProgressBar progressBar = new ProgressBar(0); final ProgressIndicator progressIndicator = new ProgressIndicator(0); final HBox hb = new HBox(); hb.setSpacing(5); hb.setAlignment(Pos.CENTER); hb.getChildren().addAll(label, progressBar, progressIndicator); mainPane.setTop(hb); final Button startButton = new Button("Start"); final Button cancelButton = new Button("Cancel"); final TextArea textArea = new TextArea(); textArea.setEditable(false); textArea.setPrefSize(200, 70); final HBox hb2 = new HBox(); hb2.setSpacing(5); hb2.setAlignment(Pos.CENTER); hb2.getChildren().addAll(startButton, cancelButton, textArea); mainPane.setBottom(hb2); // wire up start button startButton.setOnAction((e) -> { startButton.setDisable(true); progressBar.setProgress(0); progressIndicator.setProgress(0); textArea.setText(""); cancelButton.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(new ChangeListener<String>() { public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) { textArea.appendText(newValue + "\n"); } }); new Thread(copyWorker).start(); }); // cancel button will kill worker and reset. cancelButton.setOnAction((e) -> { startButton.setDisable(false); cancelButton.setDisable(true); copyWorker.cancel(true); // reset progressBar.progressProperty().unbind(); progressBar.setProgress(0); progressIndicator.progressProperty().unbind(); progressIndicator.setProgress(0); textArea.appendText("File transfer was cancelled."); }); primaryStage.setScene(scene); primaryStage.show(); } public 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); } return true; } }; } public 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); } }