Using Notification leaves ghost window on taskbar

[Ron Siven]

I use the NotifierBuilder to create a notifier, and then create a Notification using the NotificationBuilder. When I invoke the notifier.notify(notification) method, it creates a ghost window on the Windows taskbar that doesn't disappear when the Popup disappears.

    private Notification.Notifier notifier;

    notifier = NotifierBuilder.create()
            .popupLocation(Pos.BOTTOM_RIGHT)
            .popupLifeTime(Duration.millis(10_000))
            .height(120.0d)
            .build();

    Notification errorNotification = NotificationBuilder.create()   
        .title(resourceBundle.getString("title") + " - " + resourceBundle.getString("error"))
        .message(notification.getErrorMessage())
        .image(Notification.ERROR_ICON)
        .build();

    Platform.runLater(() -> notifier.notify(errorNotification));

[Ron Siven]

Here is a screenshot of the window that appears.

[Gerrit Grunwald]

Hmm...strange, this window does not appear on my Mac. Will try to fix it...

[Gerrit Grunwald]

Can you try with last commit? I just modified some minor things but not sure if it has an effect on Windows.

[Ron Siven]

Thanks for your timely response! I have a tight timeline for my project, and this notification tool is exactly what I need. So, thank you for that as well!

I just pulled your changes, and still see the same behavior. What I have done for now is change the showPopup method to hide the stage if the popups list is empty. So, from this:

    timeline.setOnFinished(actionEvent -> Platform.runLater(() -> {
        POPUP.hide();
        popups.remove(POPUP);
        fireNotificationEvent(new NotificationEvent(NOTIFICATION, Notifier.this, POPUP, NotificationEvent.HIDE_NOTIFICATION));
    }));

to this:

    timeline.setOnFinished(actionEvent -> Platform.runLater(() -> {
        POPUP.hide();
        popups.remove(POPUP);
        if (popups.isEmpty()) {
            stage.hide();
        }
        fireNotificationEvent(new NotificationEvent(NOTIFICATION, Notifier.this, POPUP, NotificationEvent.HIDE_NOTIFICATION));
    }));

I also added an icon to the stage. :)

[Ron Siven]

Gerrit,

It appears as though I'm not the only one. I see that someone else commented about a similar issue a couple of weeks ago on the YouTube video for this feature of Enzo: https://youtu.be/82m0tNfx7pE

Could it be a Windows 10 thing? I kind of doubt it. It's most likely a Windows or a Java thing. If we could specify more than one StageStyle like TRANSPARENT and UTILITY, this would not be a problem.

I'm happy to assist in any way I can. I'll keep seeking answers in the meantime unless you find an answer before that.

Thanks again!

[Ron Siven]

This is a total hack. But, by setting stage.setY(-100); and stage.initStyle(StageStyle.UTILITY); in the initGraphics() method of the Notification.Notifier enum, the window doesn't appear on the taskbar. Nor is it visible to the user as it is off of the viewable area of the srceen. ¯_(ツ)_/¯

[Gerrit Grunwald]

Yep I played with the same hack but did not like it much which is the reason why it is not in :) So it seems that this problem only occurs on Windows, problem for me is that I do not have a windows machine available, just OS X and Linux. Will try to find a way...

[Gerrit Grunwald]

You might want to try the following in Notifier:

private void initGraphics() {
    scene = new Scene(new Region());
    scene.setFill(null);
    scene.getStylesheets().add(getClass().getResource("notifier.css").toExternalForm());

    stage = new Stage();
    stage.setMinWidth(0);
    stage.setMinHeight(0);
    stage.setMaxWidth(0);
    stage.setMaxHeight(0);
    stage.setWidth(0);
    stage.setHeight(0);
    stage.initModality(Modality.NONE);

    stage.setResizable(false);
    //stage.initStyle(StageStyle.TRANSPARENT);
    stage.initStyle(StageStyle.UTILITY);
    stage.setScene(scene);
    stage.setAlwaysOnTop(true);
}

[Gerrit Grunwald]

Might be that the following issue is related to the problem: JavaFX Issue Tracker

[Ron Siven]

Funny. They mention the same hack I did, and they also call it what it is. A hack! :-D

[Ron Siven]

I tried the code from above, but to no avail. The window does not appear on the taskbar, but it appears on the desktop as a tiny window with only a close ('X') button.

[Ron Siven]

Here is another screenshot of the window in action.