Examples with Ticket com.vaadin.flow.component.combobox.test.entity.Ticket used on opensource projects

Example 1 with Ticket

use of com.vaadin.flow.component.combobox.test.entity.Ticket in project flow-components by vaadin.

the class ComboBoxView method itemCountChangeNotification.

private void itemCountChangeNotification() {
    ComboBox<Ticket> comboBox = new ComboBox<>("Available tickets");
    comboBox.setPlaceholder("Select a ticket");
    Collection<Ticket> tickets = generateTickets();
    ComboBoxListDataView<Ticket> dataView = comboBox.setItems(tickets);
    Button buyTicketButton = new Button("Buy a ticket", click -> comboBox.getOptionalValue().ifPresent(dataView::removeItem));
    /*
         * If you want to get notified when the ComboBox's items count has
         * changed on the server-side, i.e. due to adding or removing an
         * item(s), or by changing the server-side filtering, you can add a
         * listener using a data view API.
         *
         * Please note that the ComboBox's client-side filter change won't fire
         * the event, since it doesn't change the item count on the server-side,
         * but only reduces the item list in UI and makes it easier to search
         * through the items.
         */
    dataView.addItemCountChangeListener(event -> comboBox.getOptionalValue().ifPresent(ticket -> {
        if (event.getItemCount() > 0) {
            Notification.show(String.format("Ticket with %s is sold. %d ticket(s) left", ticket, event.getItemCount()), 3000, Notification.Position.MIDDLE);
        } else {
            Notification.show("All tickets were sold out", 3000, Notification.Position.MIDDLE);
            buyTicketButton.setEnabled(false);
        }
        comboBox.clear();
    }));
    HorizontalLayout layout = new HorizontalLayout(comboBox, buyTicketButton);
    layout.setAlignItems(FlexComponent.Alignment.BASELINE);
    addCard("Item Count Change Notification", layout);
}