Dfyjkt

How can I display my progress bar through pop up and automatically close if process is finished. Here is my code.

 Task<ProgressForm> task = new Task<ProgressForm>() 
 @Override 
 public ProgressForm call() throws InterruptedException
 ProgressForm pf = new ProgressForm();
 for (int i = 1; i <= 10; i++) 
 pf.activateProgressBar(this);
 updateProgress(i, 10);
 
 return pf; 
 
 ;

 task.setOnSucceeded(new EventHandler<WorkerStateEvent>() 
 @Override
 public void handle(WorkerStateEvent t) 
 ProgressForm pf = (ProgressForm)task.getValue();
 pf.getDialogStage().close();
 
 );

 Thread th = new Thread(task);
 th.run();

Progress form class:

private final Stage dialogStage;
private final ProgressBar pb = new ProgressBar();
private final ProgressIndicator pin = new ProgressIndicator();

public ProgressForm() 
 dialogStage = new Stage();
 dialogStage.initStyle(StageStyle.UTILITY);
 dialogStage.setResizable(false);
 dialogStage.initModality(Modality.APPLICATION_MODAL);

 // PROGRESS BAR
 final Label label = new Label();
 label.setText("alerto");

 pb.setProgress(-1F);
 pin.setProgress(-1F);

 final HBox hb = new HBox();
 hb.setSpacing(5);
 hb.setAlignment(Pos.CENTER);
 hb.getChildren().addAll(pb, pin);

 Scene scene = new Scene(hb);
 dialogStage.setScene(scene);


public void activateProgressBar(final Task task) throws InterruptedException 
 pb.progressProperty().bind(task.progressProperty());
 pin.progressProperty().bind(task.progressProperty());
 dialogStage.show();


public Stage getDialogStage() 
 return dialogStage;

The problem with this code is

1. if i use .show(), displaying pop up is smooth but NO PROGRESS BAR.


2. if i use .showAndWait(), displaying pop up requires manual exit for the pop up to close BUT Progress bar displays.

Any thoughts/ideas about this?

The two rules for multithreading in JavaFX are:

1. Code which modifies the UI (creates a Stage or changes properties
   of nodes that are part of a scene graph) must be executed on the
   JavaFX Application thread. Violating this rule will either throw
   IllegalStateExceptions or result in unpredictable behavior.


2. Code which takes a long time to execute should be executed in a background thread (i.e. not the FX Application Thread). Violating this rule will cause the UI to become unresponsive.

Your code violates the first rule, because it calls the ProgressForm constructor in a background thread. You should set up the UI first, show the dialog, and then start the background thread.

Note that there is no need to repeatedly bind the progress properties of the progress bar and indicator to the progress property of the task. Once it is bound, it will remain bound until and unless you unbind it.

It's quite hard to fix your code as it stands, because your background task doesn't actually do anything that takes any time. Here's a version of what you're doing with just a pause:

import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.geometry.Pos;
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.HBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class ProgressDialogExample extends Application 

 @Override
 public void start(Stage primaryStage) 
 Button startButton = new Button("Start");
 startButton.setOnAction(e -> 
 ProgressForm pForm = new ProgressForm();

 // In real life this task would do something useful and return 
 // some meaningful result:
 Task<Void> task = new Task<Void>() 
 @Override
 public Void call() throws InterruptedException 
 for (int i = 0; i < 10; i++) 
 updateProgress(i, 10);
 Thread.sleep(200);
 
 updateProgress(10, 10);
 return null ;
 
 ;

 // binds progress of progress bars to progress of task:
 pForm.activateProgressBar(task);

 // in real life this method would get the result of the task
 // and update the UI based on its value:
 task.setOnSucceeded(event -> 
 pForm.getDialogStage().close();
 startButton.setDisable(false);
 );

 startButton.setDisable(true);
 pForm.getDialogStage().show();

 Thread thread = new Thread(task);
 thread.start();
 );

 StackPane root = new StackPane(startButton);
 Scene scene = new Scene(root, 350, 75);
 primaryStage.setScene(scene);
 primaryStage.show();

 

 public static class ProgressForm 
 private final Stage dialogStage;
 private final ProgressBar pb = new ProgressBar();
 private final ProgressIndicator pin = new ProgressIndicator();

 public ProgressForm() 
 dialogStage = new Stage();
 dialogStage.initStyle(StageStyle.UTILITY);
 dialogStage.setResizable(false);
 dialogStage.initModality(Modality.APPLICATION_MODAL);

 // PROGRESS BAR
 final Label label = new Label();
 label.setText("alerto");

 pb.setProgress(-1F);
 pin.setProgress(-1F);

 final HBox hb = new HBox();
 hb.setSpacing(5);
 hb.setAlignment(Pos.CENTER);
 hb.getChildren().addAll(pb, pin);

 Scene scene = new Scene(hb);
 dialogStage.setScene(scene);
 

 public void activateProgressBar(final Task<?> task) 
 pb.progressProperty().bind(task.progressProperty());
 pin.progressProperty().bind(task.progressProperty());
 dialogStage.show();
 

 public Stage getDialogStage() 
 return dialogStage;
 
 

 public static void main(String args) 
 launch(args);
 

You can use controlsfx library to display this easily

private void progressDialogue()
 copyWorker = createWorker();
 ProgressDialog dialog = new ProgressDialog(copyWorker);
 dialog.initStyle(StageStyle.TRANSPARENT);

 dialog.setGraphic(null);
 //stage.initStyle(StageStyle.TRANSPARENT);
 dialog.initStyle(StageStyle.TRANSPARENT);
 //dialog.setContentText("Files are Uploading");
 //dialog.setTitle("Files Uploading");
 //dialog.setHeaderText("This is demo");
 dialog.setHeaderText(null);
 dialog.setGraphic(null);
 dialog.initStyle(StageStyle.UTILITY);
 new Thread(copyWorker).start(); 
 dialog.showAndWait();



public Task createWorker() 
 return new Task() 
 @Override
 protected Object call() throws Exception 
 for (int i = 0; i < 10; i++) 
 Thread.sleep(100);
 updateMessage("2000 milliseconds");
 updateProgress(i + 1, 10);
 
 return true;
 
 ;

now you need to call the method progressDialogue();

the code is from this video : https://www.youtube.com/watch?v=DK_1YGLI9ig