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;
}
}
}
}
protected virtual void OnPreviewMouseLeftButtonDownCommand(MouseButtonEventArgs e)
{
var presenter = VisualFinder.GetAncestor <ContentPresenter>((DependencyObject)e.OriginalSource);
if (presenter != null)
{
if (presenter.DataContext is IPalleteVM item)
{
DragDrop.DoDragDrop(presenter, new DataObject(SpriteData.FORMAT_DRAG_DROP, item.Entity), DragDropEffects.Copy);
}
}
}
protected virtual void OnMoveJack(MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
_startPointConnector = null;
return;
}
var jack = VisualFinder.GetAncestor <Jack>((DependencyObject)e.OriginalSource);
if (_startPointConnector.HasValue && jack != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(ActivityCanvas.Instance);
if (adornerLayer != null)
{
var adorner = new ConnectorAdorner(ActivityCanvas.Instance, _startPointConnector, jack, this);
adornerLayer.Add(adorner);
e.Handled = 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);
}
