public static void BindFlagInput <T>(this Element self, BindFlagInputOptions <T> options)
where T : class, INotifyPropertyChanged
{
var source = options.BindObject
?? throw new ArgumentNullException(nameof(options.BindObject));
var property = options.Property
?? throw new ArgumentNullException(nameof(options.Property));
if (property.Body is not MemberExpression)
{
throw new ArgumentException(Resources.InvalidBindingExpression);
}
var attribute = options.Attribute;
if (string.IsNullOrWhiteSpace(attribute))
{
throw new ArgumentException("Attribute cannot be empty");
}
attribute = attribute.ToLowerInvariant();
var setter = CompileSetter(property);
var getter = property.Compile();
self.Bind(source, _ =>
{
var value = getter(source);
self.ToggleAttributeLower(attribute, value);
});
self.BindBack(_ =>
{
var value = self.HasAttributeLower(attribute);
setter(source, value);
});
}
/// <summary>
/// Adds a two-way binding for a flag attribute (e.g. 'checked' attribute)
/// </summary>
/// <typeparam name="T">Type of data source</typeparam>
/// <param name="options">Binding options</param>
/// <returns>This instance</returns>
public LaraBuilder BindFlagInput <T>(BindFlagInputOptions <T> options)
where T : class, INotifyPropertyChanged
{
_stack.Peek().BindFlagInput(options);
return(this);
}
