void HitTest(Point hitPoint)
{
if (_spriteTarget != null)
{
_spriteTarget.IsDragConnectionOver = false;
_spriteTarget = null;
}
if (_jackTarget != null)
{
_jackTarget.IsConnectionOver = false;
_jackTarget = null;
}
VisualTreeHelper.HitTest(_adornedElement,
new HitTestFilterCallback(HitTestFilter),
result => HitTestResultBehavior.Continue,
new PointHitTestParameters(hitPoint));
if (_adornedElement.InputHitTest(hitPoint) is DependencyObject inputElement)
{
var contentControl = VisualFinder.GetAncestor <ContentControl>(inputElement);
if (contentControl != null)
{
_spriteTarget = contentControl.DataContext as ISpriteVM;
if (_spriteTarget != null)
{
_spriteTarget.IsDragConnectionOver = true;
}
}
}
}
public ConnectorAdorner(UIElement adornedElement, Point?startPoint, Jack jackSource, ISpriteVM spriteSource)
: base(adornedElement)
{
_adornedElement = adornedElement;
_startPoint = startPoint;
_jackSource = jackSource;
_spriteSource = spriteSource;
Cursor = Cursors.Cross;
_jackSource.IsConnectionOver = true;
}
HitTestFilterBehavior HitTestFilter(DependencyObject o)
{
if (o.GetType() == typeof(Jack))
{
_jackTarget = (Jack)o;
if (ReferenceEquals(_jackTarget, _jackSource))
{
return(HitTestFilterBehavior.ContinueSkipSelfAndChildren);
}
_jackTarget.IsConnectionOver = true;
var contentControl = VisualFinder.GetAncestor <ContentControl>(_jackTarget);
_spriteTarget = contentControl.DataContext as ISpriteVM;
if (_spriteTarget != null)
{
_spriteTarget.IsDragConnectionOver = true;
}
return(HitTestFilterBehavior.ContinueSkipSelfAndChildren);
}
return(HitTestFilterBehavior.Continue);
}