static void SetEventOrigin(UIEventArgs e, HitChain hitChain)
{
int count = hitChain.Count;
if (count > 0)
{
var hitInfo = hitChain.GetHitInfo(count - 1);
e.ExactHitObject = hitInfo.hitElement;
}
}
static RenderElement HitTestOnPreviousChain(HitChain hitPointChain, HitChain previousChain, int x, int y)
{
#if DEBUG
if (hitPointChain == previousChain)
{
throw new NotSupportedException();
}
#endif
if (previousChain.Count > 0)
{
previousChain.SetStartTestPoint(x, y);
//test on prev chain top to bottom
int j = previousChain.Count;
for (int i = 0; i < j; ++i)
{
HitInfo hitInfo = previousChain.GetHitInfo(i);
RenderElement elem = hitInfo.hitElement;
if (elem != null && elem.VisibleAndHasParent)
{
if (elem.Contains(hitInfo.point))
{
RenderElement found = elem.FindUnderlyingSiblingAtPoint(hitInfo.point);
if (found == null)
{
Point leftTop = elem.Location;
hitPointChain.OffsetTestPoint(leftTop.X, leftTop.Y);
hitPointChain.AddHitObject(elem);
//add to chain
}
else
{
break;
}
}
}
else
{
break;
}
}
}
//---------------------------------
if (hitPointChain.Count > 0)
{
var commonElement = hitPointChain.GetHitInfo(hitPointChain.Count - 1).hitElement;
hitPointChain.RemoveCurrentHit();
return commonElement;
}
else
{
return null;
}
}
static void ForEachEventListenerBubbleUp(UIEventArgs e, HitChain hitPointChain, EventListenerAction listenerAction)
{
HitInfo hitInfo;
for (int i = hitPointChain.Count - 1; i >= 0; --i)
{
hitInfo = hitPointChain.GetHitInfo(i);
IEventListener listener = hitInfo.hitElement.GetController() as IEventListener;
if (listener != null)
{
if (e.SourceHitElement == null)
{
e.SourceHitElement = listener;
}
var hitPoint = hitInfo.point;
e.SetLocation(hitPoint.X, hitPoint.Y);
e.CurrentContextElement = listener;
if (listenerAction(listener))
{
return;
}
}
}
}
static void ForEachOnlyEventPortalBubbleUp(UIEventArgs e, HitChain hitPointChain, EventPortalAction eventPortalAction)
{
for (int i = hitPointChain.Count - 1; i >= 0; --i)
{
HitInfo hitPoint = hitPointChain.GetHitInfo(i);
object currentHitElement = hitPoint.hitElement.GetController();
IEventPortal eventPortal = currentHitElement as IEventPortal;
if (eventPortal != null)
{
var ppp = hitPoint.point;
e.CurrentContextElement = currentHitElement as IEventListener;
e.SetLocation(ppp.X, ppp.Y);
if (eventPortalAction(eventPortal))
{
return;
}
}
}
}
