/// <summary>
/// Compares two bindings and returns a value indicating whether
/// one is less than, equal to, or greater than the other.
/// </summary>
/// <param name="binding">The first binding to compare.</param>
/// <param name="other">The second binding to compare.</param>
/// <returns>A signed integer that indicates the relative values of binding and other.</returns>
public static int Compare(SingleTouchBinding binding, SingleTouchBinding other)
{
int result = 0;
if (result == 0)
{
result = binding.Priority.CompareTo(other.Priority) * -1;
}
if (result == 0)
{
result = binding.Identifier.CompareTo(other.Identifier);
}
return(result);
}
/// <summary>
/// Adds a binding for the observer if one doesn't exist.
/// Modifies existing binding otherwise.
/// </summary>
/// <param name="observer">The observer to add.</param>
/// <param name="priority">
/// The priority of the observer. Observers
/// with higher priority will receive touch events before observers with
/// lower priority. The default value is zero.
/// </param>
/// <param name="swallowsTouches">
/// The value indicating if the binding should swallow touches. If the value
/// is <c>true</c> and the observer's <see cref="ISingleTouchObserver.OnTouchBegan" />
/// method returns <c>true</c>, other observers with lower priority will not receive any
/// events for the touch.
/// </param>
public void Add(ISingleTouchObserver observer, int priority = 0, bool swallowsTouches = true)
{
SingleTouchBinding binding;
binding = this.GetBinding(observer);
if (binding == null)
{
binding = new SingleTouchBinding();
binding.Observer = observer;
binding.Priority = priority;
binding.SwallowsTouches = swallowsTouches;
this.AddBinding(binding);
}
else if (binding.Priority != priority || binding.SwallowsTouches != swallowsTouches)
{
binding.Priority = priority;
binding.SwallowsTouches = swallowsTouches;
this.Dirty = true;
}
}
private void RemoveBinding(SingleTouchBinding binding)
{
if (this.Locked)
{
if (this.BindingsToAdd.Contains(binding) == true)
{
this.BindingsToAdd.Remove(binding);
}
if (this.BindingsToRemove.Contains(binding) == false)
{
this.BindingsToRemove.Add(binding);
}
}
else
{
if (this.Bindings.Contains(binding) == true)
{
this.Bindings.Remove(binding);
this.Dirty = true;
}
}
}
