public void clickAddButton() {
        WindowToCreateEvent windowToCreateEvent = new WindowToCreateEvent();
        windowToCreateEvent.createUserInput();
        Optional<Event> result = windowToCreateEvent.getInputResult();

        result.ifPresent(res -> {
            if (!res.getMessage().isEmpty()) {
                int key = 0;
                try {
                    key = dataBase.addEvent(result.get());
                    Event event = new Event(key, result.get().getId_user(), result.get().getDay(),
                            result.get().getHour(),result.get().getMin(), result.get().getMessage());
                    EventField eventField = new EventField(event);
                    Button eventButton = eventField.createButtonEvent();
                    Pane node_result = null;
                    ObservableList<Node> childrens = gridPaneDay.getChildren();
                    System.out.println(eventField.getDayId() + " " + eventField.getHour());
                    int counter = 0;

                    node_result = (Pane) gridPaneDay.getChildren().get(eventField.getDayId()*7+ eventField.getHour());
                    System.out.println(node_result);

                    ObservableList<Node> childrensOfResult = node_result.getChildren();
                    for(Node childs : childrensOfResult) {
                        counter++;
                    }

                    if(counter == 0) {
                        eventButton.setLayoutY(0);
                    } else {
                        eventButton.setLayoutY(counter * 25);
                    }

                    eventButton.setMaxHeight(20);
                    rowsconstraints.get(eventField.getHour()).setMinHeight((1+counter)*25);
                    node_result.getChildren().add(eventButton);
                    mapOfButtons.put(key, eventButton);
                } catch(SQLException e) {
                    e.printStackTrace();
                }
            }
        });
    }