How can I use a modal dialog in conjunction with Vaadin Flow notifications?

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To use a modal dialog in conjunction with Vaadin Flow notifications, you can follow these steps:

1. Create a modal dialog by extending the Vaadin Dialog class.

Example:

public class MyDialog extends Dialog {

  public MyDialog() {
    setCloseOnEsc(false);
    setCloseOnOutsideClick(false);
  }

  // add your own content to the dialog
}

1. In your UI class, create a notification listener that shows the modal dialog when a notification is added.

Example:

Notification.show("Hello, World!", 3000, Notification.Position.TOP_CENTER)
        .addClickListener(e -> {
            MyDialog dialog = new MyDialog();
            dialog.open();
        });

1. You can also add a button to your modal dialog that closes the dialog.

Example:

public class MyDialog extends Dialog {

  public MyDialog() {
      // ...

      Button closeButton = new Button("Close", e -> close());
      add(closeButton);
  }

  // ...
}

1. Finally, add the modal dialog to your UI class.

Example:

public class MyUI extends VerticalLayout {

  public MyUI() {

    // ...

    MyDialog myDialog = new MyDialog();
    add(myDialog);
  }

  // ...
}

With these steps, you can use a modal dialog in conjunction with Vaadin Flow notifications. When the notification is clicked, the modal dialog will appear, and the user can close it using the close button.