/// <summary>
/// Swaps to the customization screen of the chosen item.
/// </summary>
/// <param name="sender">The button that was clicked</param>
/// <param name="e">The event arguments.</param>
private void CustomizeItemClicked(object sender, RoutedEventArgs e)
{
if (sender is Button b)
{
if (DataContext is Combo combo)
{
IMenuScreen menu = this.GetParent <ItemCustomization>();
if (menu == null)
{
menu = this.GetParent <ItemModification>();
}
ItemModification modifier = new ItemModification();
IOrderItem item = combo.Entree;
if ((string)b.Tag == "1")
{
item = combo.Drink;
}
else if ((string)b.Tag == "2")
{
item = combo.Side;
}
CustomizationScreen screen = Helper.GetCustomizationScreen(item, out string text);
modifier.customizeItemLabel.Text = text;
screen.DataContext = item;
modifier.customizationContainer.Child = screen;
modifier.ReturnScreen = menu as UserControl;
menu.OrderComponent.ChangeScreen(modifier);
}
}
}
/// <summary>
/// Returns to the menu selection screen without adding the item.
/// </summary>
/// <param name="sender">The button that was pressed.</param>
/// <param name="e">The event arguments associated with the press.</param>
private void CancelClicked(object sender, RoutedEventArgs e)
{
CustomizationScreen customization = customizationContainer.Child as CustomizationScreen;
if (customization == null)
{
throw new InvalidOperationException("Cannot add the item when no customization has been set.");
}
if (DataContext is Order order)
{
order.Remove(customization.OrderedItem);
}
OrderComponent.ChangeScreen(new MenuSelectionScreen());
}
/// <summary>
/// Adds the customized item to the order and returns to the menu selection screen.
/// </summary>
/// <param name="sender">The button that was pressed.</param>
/// <param name="e">The event arguments associated with the press.</param>
/// <exception cref="System.InvalidOperationException">Thrown if there is no actual customization component.</exception>
private void AddItemClicked(object sender, RoutedEventArgs e)
{
CustomizationScreen customization = customizationContainer.Child as CustomizationScreen;
OrderComponent.ChangeScreen(new MenuSelectionScreen());
}