/// <summary>
/// Get touches from the selected source list
/// </summary>
protected IEnumerable <Touch> GetTouchesFromSource(NotuiElement element,
InteractingTouchSource touchsrc = InteractingTouchSource.Touching)
{
switch (touchsrc)
{
case InteractingTouchSource.Touching:
return(element.Touching.Keys);
case InteractingTouchSource.Hitting:
return(element.Hitting.Keys);
case InteractingTouchSource.Mice:
return(element.Mice);
default:
return(Enumerable.Empty <Touch>());
}
}
/// <summary>
/// Get all the touches which can act on this behavior
/// </summary>
/// <param name="element"></param>
/// <param name="touchsrc"></param>
/// <returns></returns>
protected List <Touch> GetBehavingTouches(NotuiElement element, InteractingTouchSource touchsrc = InteractingTouchSource.Touching)
{
List <Touch> touches;
if (UseOnlyWithSpecificChildren == null)
{
touches = GetTouchesFromSource(element, touchsrc).ToList();
if (UseChildrenInteracting)
{
AddChildrenTouches(element, touches, touchsrc);
}
}
else
{
touches = new List <Touch>();
var selectedChildren = UseOnlyWithSpecificChildren(element);
foreach (var child in selectedChildren)
{
touches.AddRange(GetTouchesFromSource(child, touchsrc));
}
}
return(touches);
}
/// <summary>
/// Recursive function which adds touches interacting with the children to this behavior
/// </summary>
/// <param name="element"></param>
/// <param name="touches"></param>
/// <param name="touchsrc"></param>
protected void AddChildrenTouches(NotuiElement element, List <Touch> touches, InteractingTouchSource touchsrc = InteractingTouchSource.Touching)
{
foreach (var child in element.Children.Values)
{
touches.AddRange(GetTouchesFromSource(child, touchsrc));
AddChildrenTouches(child, touches, touchsrc);
}
}