CODEWITHSUNDEEP
javajavafxjavafx-8
Xiao Lin Li
Xiao Lin Li

Reputation: 147

JavaFX How to bring Dialog/Alert to the front of the screen

I want to force an Alert to be on top of other applications. Alerts seems to be lacking a setAlwaysOnTop function.

I have seen this post: JavaFX 2.2 Stage always on top.

I have tried:

  1. create a new stage and stage.setAlwaysOnTop(true), then alert.initOwner(stage).
  2. create a new stage and stage.initModality(Modality.APPLICATION_MODAL), then alert.initOwner(stage).

Does anyone know how to achieve this?

Edit: I am using Java 8.

Let say I have safari opened, and it is being focused. I want to bring the Alert to the top of the screen, in front of safari, when I call its showAndWait() function.

Upvotes: 6

Views: 15505

Answers (4)

Robert Mugattarov
Robert Mugattarov

Reputation: 1298

I have tried fabians and claimoars solutions and simplified them to:

((Stage) dialog.getDialogPane().getScene().getWindow()).setAlwaysOnTop(true);

This works in my Eclipse / JavaFX app.

Upvotes: 10

claimoar
claimoar

Reputation: 271

 Alert alert = new Alert(Alert.AlertType.WARNING, "I Warn You!", ButtonType.OK, ButtonType.CANCEL);

 Stage stage = (Stage) alert.getDialogPane().getScene().getWindow();
 stage.setAlwaysOnTop(true);
 stage.toFront(); // not sure if necessary

Upvotes: 24

fabian
fabian

Reputation: 82461

You could "steal" the DialogPane from a Alert and show it in a utility Stage. For this window you can set the alwaysOnTop property the usual way:

Alert alert = new Alert(Alert.AlertType.WARNING, "I Warn You!", ButtonType.OK, ButtonType.CANCEL);
DialogPane root = alert.getDialogPane();

Stage dialogStage = new Stage(StageStyle.UTILITY);

for (ButtonType buttonType : root.getButtonTypes()) {
    ButtonBase button = (ButtonBase) root.lookupButton(buttonType);
    button.setOnAction(evt -> {
        root.setUserData(buttonType);
        dialogStage.close();
    });
}

// replace old scene root with placeholder to allow using root in other Scene
root.getScene().setRoot(new Group());

root.setPadding(new Insets(10, 0, 10, 0));
Scene scene = new Scene(root);

dialogStage.setScene(scene);
dialogStage.initModality(Modality.APPLICATION_MODAL);
dialogStage.setAlwaysOnTop(true);
dialogStage.setResizable(false);
dialogStage.showAndWait();
Optional<ButtonType> result = Optional.ofNullable((ButtonType) root.getUserData());
System.out.println("result: "+result.orElse(null));

Upvotes: 10

ali shreef
ali shreef

Reputation: 89

try this 

 Alert a = new Alert(AlertType.ERROR);
        a.setTitle("Title of alert");
        a.initStyle(StageStyle.UNDECORATED);
        a.setContentText("details of message");
        a.showAndWait();

you can use this to force alert message to appear to the user if some thing wrong happen,for example when user enter the data as string and you accept data as integer. i hope that helps you.

note: i think Alert is available for javafx (jdk 1.8).

Upvotes: -1

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