private UIElement GetReactViewTarget(DependencyObject originalSource, Point point)
{
// If the target is not a child of the root view, then this pointer
// event does not belong to React.
if (!RootViewHelper.IsReactSubview(originalSource))
{
return null;
}
// population of sources provided by:
// http://stackoverflow.com/questions/2059475/what-is-the-silverlights-findelementsinhostcoordinates-equivalent-in-wpf
var sources = new List<DependencyObject>();
//changed from external edits, because VisualHit is
//only a DependencyObject and may not be a UIElement
//this could cause exceptions or may not be compiling at all
//simply filter the result for class UIElement and
//cast it to IEnumerable<UIElement> if you need
//the very exact same result including type
VisualTreeHelper.HitTest(
_view,
null,
new HitTestResultCallback(
hit =>
{
var source = hit.VisualHit;
if (!source.HasTag())
{
return HitTestResultBehavior.Continue;
}
var pointerEvents = source.GetPointerEvents();
if (pointerEvents == PointerEvents.None || pointerEvents == PointerEvents.BoxNone)
{
return HitTestResultBehavior.Continue;
}
sources.Add(hit.VisualHit);
return HitTestResultBehavior.Continue;
}),
new PointHitTestParameters(point));
// Get the first React view that does not have pointer events set
// to 'none' or 'box-none', and is not a child of a view with
// 'box-only' or 'none' settings for pointer events.
// TODO: use pooled data structure
var isBoxOnlyCache = new Dictionary<DependencyObject, bool>();
foreach (var source in sources)
{
var viewHierarchy = RootViewHelper.GetReactViewHierarchy(source);
var isBoxOnly = IsBoxOnlyWithCache(viewHierarchy, isBoxOnlyCache);
if (!isBoxOnly)
{
return (UIElement)source;
}
}
return null;
}
private UIElement GetReactViewTarget(DependencyObject originalSource, Point point)
{
// If the target is not a child of the root view, then this pointer
// event does not belong to React.
if (!RootViewHelper.IsReactSubview(originalSource))
{
return(null);
}
var adjustedPoint = AdjustPointForStatusBar(point);
var sources = VisualTreeHelper.FindElementsInHostCoordinates(adjustedPoint, _view);
// Get the first React view that does not have pointer events set
// to 'none' or 'box-none', and is not a child of a view with
// 'box-only' or 'none' settings for pointer events.
// TODO: use pooled data structure
var isBoxOnlyCache = new Dictionary <DependencyObject, bool>();
foreach (var source in sources)
{
if (!source.HasTag())
{
continue;
}
var pointerEvents = source.GetPointerEvents();
if (pointerEvents == PointerEvents.None || pointerEvents == PointerEvents.BoxNone)
{
continue;
}
var viewHierarchy = RootViewHelper.GetReactViewHierarchy(source);
var isBoxOnly = IsBoxOnlyWithCache(viewHierarchy, isBoxOnlyCache);
if (!isBoxOnly)
{
return(source);
}
}
return(null);
}
private static bool ShouldSendEnterLeaveEvent(DependencyObject view)
{
// If the target is not a child of the root view, then this pointer
// event does not belong to React.
if (!RootViewHelper.IsReactSubview(view))
{
return false;
}
var viewHierarchy = RootViewHelper.GetReactViewHierarchy(view);
foreach (var ancestor in viewHierarchy)
{
var pointerEvents = ancestor.GetPointerEvents();
if (pointerEvents == PointerEvents.None || pointerEvents == PointerEvents.BoxNone)
{
return false;
}
}
return true;
}
private UIElement GetReactViewTarget(DependencyObject originalSource, Point point)
{
// If the target is not a child of the root view, then this pointer
// event does not belong to React.
if (!RootViewHelper.IsReactSubview(originalSource))
{
return(null);
}
// population of sources provided by:
// http://stackoverflow.com/questions/2059475/what-is-the-silverlights-findelementsinhostcoordinates-equivalent-in-wpf
var sources = new List <DependencyObject>();
//changed from external edits, because VisualHit is
//only a DependencyObject and may not be a UIElement
//this could cause exceptions or may not be compiling at all
//simply filter the result for class UIElement and
//cast it to IEnumerable<UIElement> if you need
//the very exact same result including type
VisualTreeHelper.HitTest(
_view,
null,
new HitTestResultCallback(
hit =>
{
var source = hit.VisualHit;
if (!source.HasTag())
{
return(HitTestResultBehavior.Continue);
}
var pointerEvents = source.GetPointerEvents();
if (pointerEvents == PointerEvents.None || pointerEvents == PointerEvents.BoxNone)
{
return(HitTestResultBehavior.Continue);
}
sources.Add(hit.VisualHit);
return(HitTestResultBehavior.Continue);
}),
new PointHitTestParameters(point));
var viewHierarchy = RootViewHelper.GetReactViewHierarchy(originalSource);
var dependencyObjects = viewHierarchy as DependencyObject[] ?? viewHierarchy.ToArray();
var enumerator = dependencyObjects.GetEnumerator();
if (!enumerator.MoveNext())
{
return(null);
}
if (enumerator.Current.GetPointerEvents() == PointerEvents.BoxNone)
{
var nonBoxOnlyView =
sources.FirstOrDefault(x => x.HasTag() && x.GetPointerEvents() != PointerEvents.BoxNone);
enumerator = RootViewHelper.GetReactViewHierarchy(nonBoxOnlyView).GetEnumerator();
if (!enumerator.MoveNext())
{
return(null);
}
}
var element = enumerator.Current;
while (enumerator.MoveNext())
{
var current = enumerator.Current;
if (element == null || current.GetPointerEvents() == PointerEvents.BoxOnly || !(element is UIElement))
{
element = current;
}
}
return((UIElement)element);
}