How do you set the icon of a Dialog control Java FX/Java 8

Question

I might be missing something very obvious, but I can\'t find out how to set the Icon for a Dialog component (ProgressDialog to be more precise). I know how to do that for a Stag

Answer 1

This is a method that I include in my JavaFX projects, simply calling this method and passing the Alert as a parameter will set both the title bar icon and the header graphic.

public class Msg {

public void showInfo(String title, String header, String message) {
    Alert alertShowInfo = new Alert(Alert.AlertType.INFORMATION);
    addDialogIconTo(alertShowInfo); //add icon and header graphic
    alertShowInfo.setTitle(title);
    alertShowInfo.setHeaderText(header);
    alertShowInfo.setContentText(message);
    alertShowInfo.showAndWait();
}

//this adds images to Alert
public void addDialogIconTo(Alert alert) {
    // Add custom Image to Dialog's title bar
    final Image APPLICATION_ICON = new Image("icon.png");
    Stage dialogStage = (Stage) alert.getDialogPane().getScene().getWindow();
    dialogStage.getIcons().add(APPLICATION_ICON);

    // Add custom ImageView to Dialog's header pane.        
    final ImageView DIALOG_HEADER_ICON = new ImageView("icon.png");
    DIALOG_HEADER_ICON.setFitHeight(48); // Set size to API recommendation.
    DIALOG_HEADER_ICON.setFitWidth(48);
    alert.getDialogPane().setGraphic(DIALOG_HEADER_ICON);                       
    }
}

Then, in whatever class I wish to use the Alert, it will already have the customized icon and header graphic.

public static void main(String[] args){
        Msg msg = new Msg();

        // Alert will now include custom icon and header graphic.
        msg.showInfo("Sucess!", "Program succeeded", "Now exiting program");
} 

Answer 2

Just Do like this:

Alert(AlertType.ERROR, "Erreur de connexion! Verifiez vos Identifiants",FINISH); //Cancel..
setTitle("XNotes FX Erreur");
stage = (Stage) alert.getDialogPane().getScene().getWindow();
stage.getIcons().add(new Image("indiza/XnotesErrorIdz.png")); // To add an icon
showAndWait();

Here is the result

**My friends, is it computer science that we do? : No, we do crafts **

Answer 3

There's an excellent tutorial here by Marco Jakob, where you can find not only how to use dialogs, but also how to solve your problem.

Both for the new dialogs (in JDK8u40 early versions or with openjfx-dialogs with JDK 8u25), or for those in ControlsFX, in order to set the icon of your dialog, you can use this solution:

Stage stage = (Stage) dialog.getDialogPane().getScene().getWindow();
stage.getIcons().add(
    new Image(this.getClass().getResource("<image>.png").toString()));

This code snippet shows how to use a ProgressDialog, from ControlsFX, and set an icon for the dialog:

@Override
public void start(Stage primaryStage) {

    Service<Void> service = new Service<Void>() {
        @Override protected Task<Void> createTask() {
            return new Task<Void>() {
                @Override protected Void call() throws InterruptedException {
                    updateMessage("Message . . .");
                    updateProgress(0, 10);
                    for (int i = 0; i < 10; i++) {
                        Thread.sleep(300);
                        updateProgress(i + 1, 10);
                        updateMessage("Progress " + (i + 1) + " of 10");
                    }
                    updateMessage("End task");
                    return null;
                }
            };
        }
    };

    Button btn = new Button("Start Service");
    btn.setOnAction(e -> {
        ProgressDialog dialog = new ProgressDialog(service);
        dialog.setTitle("Progress Dialog");
        dialog.setHeaderText("Header message");
        Stage stage = (Stage) dialog.getDialogPane().getScene().getWindow();
        stage.getIcons().add(new Image(this.getClass().getResource("<image>.png").toString()));
        service.start();
    });

    Scene scene = new Scene(new StackPane(btn), 300, 250);
    primaryStage.setScene(scene);
    primaryStage.show();
}

Answer 4

You can easily use the icon of your application for the alert-icon by setting your application-window as owner of the alert box:

@FXML
Button buShow;
...

Alert alert = new Alert(AlertType.INFORMATION, "Nice Box.", ButtonType.CLOSE);
alert.initOwner(buShow.getScene().getWindow());   // Alert uses the Windows Icon
alert.show();