/// <summary>
/// Creates a data binding between this property and another which
/// have a different type.
/// </summary>
/// <typeparam name="T2">Target property type.</typeparam>
/// <param name="property">Binding target property.</param>
/// <param name="outAdapter">Data conversion function.</param>
public void Bind <T2>(Bindable <T2> property, Func <T, T2> outAdapter)
{
if (outAdapter == null)
{
throw new InvalidOperationException("No binding adapter provided.");
}
if (!AllowedDirections.HasFlag(BindingDirection.Read))
{
throw new InvalidOperationException("This binding direction is not allowed.");
}
// - Get a weak reference of the property
var propRef = new WeakReference <Bindable <T2> >(property);
var bindingAction = new Action(() =>
{
// - Check if the target property is still alive
if (!propRef.TryGetTarget(out Bindable <T2> prop))
{
Bindings.Remove(propRef);
return;
}
// - Update value
prop.Value = outAdapter.Invoke(InternalValue);
});
Bindings.Add(propRef, bindingAction);
}
/// <summary>
/// Creates a data binding between this property and the specified one.
/// </summary>
/// <param name="property">Binding target property.</param>
/// <param name="direction">Binding direction.</param>
public void Bind(Bindable <T> property, BindingDirection direction = BindingDirection.Both)
{
bool invalidOperation = false;
invalidOperation = invalidOperation || direction.HasFlag(BindingDirection.Read) && !AllowedDirections.HasFlag(BindingDirection.Write);
invalidOperation = invalidOperation || direction.HasFlag(BindingDirection.Write) && !AllowedDirections.HasFlag(BindingDirection.Read);
if (invalidOperation)
{
throw new InvalidOperationException("This binding direction is not allowed");
}
// - Get a weak reference of the property
var propRef = new WeakReference <Bindable <T> >(property);
if (direction.HasFlag(BindingDirection.Write))
{
var bindingAction = new Action(() =>
{
// - Check if the target property is still alive
if (!propRef.TryGetTarget(out Bindable <T> prop))
{
Bindings.Remove(propRef);
return;
}
// - Update value
prop.Value = InternalValue;
});
Bindings.Add(propRef, bindingAction);
}
// - If we want to read the target property, delegate binding process
if (direction.HasFlag(BindingDirection.Read))
{
property.Bind(this, BindingDirection.Write);
}
}
