private void CoerceSelectedItem(ISpriteCategory category, [CallerMemberName] string callerName = null)
{
if (supressEvents)
{
return;
}
string propName = "null";
if (GetBindingExpression(ItemsSourceProperty) != null)
{
propName = GetBindingExpression(ItemsSourceProperty).ResolvedSourcePropertyName;
}
Console.WriteLine($"{propName} SpriteCategoryComboBox.{callerName} coerce");
supressEvents = true;
ISpriteCategory source = ItemsSource;
if (source == null)
{
category = null;
}
else if (category != null && source.TryGetValue(category.Id, out ISpriteCategory newCategory))
{
category = newCategory;
}
else
{
category = (ISpriteCategory)source.List.FirstOrDefault();
}
SelectedItem = category;
SelectedItemInternal = category;
supressEvents = false;
}
/// <summary>
/// Tries to get the category with the specified Id in the category.
/// </summary>
/// <param name="id">The Id of the category to get.</param>
/// <param name="value">The output category if one was found, otherwise null.</param>
/// <returns>True if a category with the Id was found, otherwise null.</returns>
///
/// <exception cref="ArgumentNullException">
/// <paramref name="id"/> is null.
/// </exception>
public bool TryGetValue(object id, out ISpriteCategory value)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
value = (ISpriteCategory)List.Find(e => e.Id.Equals(id));
return(value != null);
}
