Dynamic status bar

I made up a status bar, but couldn't get it to be updated while some other task is being executed, like several printing jobs. The bar is a simple JPanel with a JLabel. I tried to revalidate the panel and another thread.
What do I have to do to get the message updated?

but couldn't get it to be updated while some other task is being executed, like several printing jobs.Its probably because you aren't using Threads. If your printing jobs are executing in the Event Thread then the GUI can't be updated until the printing is finished. The printing code should be moved to a separate Thread.

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    Message was edited by:
    user630121
    Message was edited by:
    user630121

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    1. Description of table
    2. Delivery class
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    Another possible reason for your performance problem could be that when you use a vbox, the vbox content can overflow the area of the borderpane center and might be sitting on top of the menu pane, making you unable to click the menu (which is what happens to me when I try that with the draft program with the vbox wrapping mod, then resize the scene to make it smaller). This was a trick which caught me and the reason that I used a Group originally rather than a vbox. I found a vbox still works but you need to tweak things a bit. The trick I saw was that the order in which you add stuff to the borderpane is important. The borderpane acts like a stack where the last thing added floats over the top of everything else if you size the scene small enough. For your project you want the menu on top always, so it always needs to be the last thing added to the borderpane, but when you swap in the level pane for the game pane, then back out again, the game pane can end up on top of the menu which makes the menu seem like you can't click it (only when the scene is sized small enough). It was quite a subtle bug which took me a little while to work out what was happening. For me the solution was to add just one vbox to the center of the border, and then swap the game pane and the level editor in and out of the vbox, that way the center of the layout always stayed behind the menu bar and the status bar.
    I added some revisions to reflect the comments above and placed some comments in the code to note what was changed and why.
    public class SampleGameLayoutRevised extends Application {
      public static void main(String[] args) { Application.launch(args); }
      public void start(Stage stage) throws Exception {
        final BorderPane gameLayout = new BorderPane();
        final Group gameView = new Group();
        final MenuBar gameMenubar = new MenuBar();
        final Menu gameMenu = new Menu("Mode");
        final VBox centerView = new VBox();
        centerView.setStyle("-fx-background-color: darkgreen");  // we set a background color on the center view to check if it overwrites the game menu.
        MenuItem playGameMenu = new MenuItem("Play Game");
        MenuItem levelEditMenu = new MenuItem("Edit Levels");
        gameMenu.getItems().add(playGameMenu);
        gameMenu.getItems().add(levelEditMenu);
        gameMenubar.getMenus().add(gameMenu);
        final StackPane levelEditView = new StackPane();
        levelEditView.getChildren().add(new Text("Level Editor"));
        ImageView buildingView[][] = new ImageView[22][22];
        Image img = new Image("http://www.julepstudios.com/images/close-icon.png");  // use of http here is just for example, instead use an image resource from your project files.
        for (int nCol = 0; nCol < 22; nCol++) {
          for (int nRow = 0; nRow < 22; nRow++) {
            ImageView imgView = new ImageView(img);
            imgView.setScaleX(0.5);
            imgView.setScaleY(0.5);
            buildingView[nCol][nRow] = imgView;
            buildingView[nCol][nRow].setX(nCol * 20 + 5);
            buildingView[nCol][nRow].setY(nRow * 20 + 40);
            gameView.getChildren().add(buildingView[nCol][nRow]);
        final VBox statusBar = new VBox();
        final Text statusText = new Text("Playing Game");
        statusBar.getChildren().add(statusText);
        statusBar.setStyle("-fx-background-color: cornsilk"); // we set a background color on the status bar,
                                                              // because we can't rely on the scene background color
                                                              // because, if the scene is sized small, the status bar will start to overlay the game view
                                                              // and if we don't explicitly set the statusBar background the center view will start
                                                              // to bleed through the transparent background of the statusBar.
        gameLayout.setCenter(centerView); // we add the centerview first and we never change it, instead we put it's changeable contents in a vbox and change out the vbox content.
        gameLayout.setBottom(statusBar);
        gameLayout.setTop(gameMenubar);   // note the game layout is the last thing added to the borderpane so it will always stay on top if the border pane is resized.
        playGameMenu.setOnAction(new EventHandler<ActionEvent>() {
          public void handle(ActionEvent event) {
            centerView.getChildren().clear();  // here we perform a centerview vbox content swap.
            centerView.getChildren().add(gameView);
            statusText.setText("Playing Game");
        levelEditMenu.setOnAction(new EventHandler<ActionEvent>() {
          public void handle(ActionEvent event) {
            centerView.getChildren().clear();  // here we perform a centerview vbox content swap.
            centerView.getChildren().add(levelEditView);
            statusText.setText("Editing Level");
        playGameMenu.fire();
        Scene scene = new Scene(gameLayout, 800, 600, Color.CORNSILK);
        stage.setScene(scene);
        stage.show();
    }Other than that I am not sure of a reason for the slowdown you are seeing. In my experience JavaFX has been quick and responsive for the tasks I have been using it for. Admittedly, I just use if for a bunch of small trial projects, but I've never seen it unresponsive for a minute.
    - John

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