public LinkHost(UIElement surface, FunctionReference workflowLink, ObjectConnector source, ObjectConnector target, Orientation orientation)
{
Stroke = _commonBrush;
StrokeThickness = 2;
_workflowLink = workflowLink;
_surface = surface;
_source = source;
_target = target;
_orientation = orientation;
InitializeGeometry();
}
private void OnSurfaceMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var sourceConnector = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), _surface).OfType<ObjectConnector>().FirstOrDefault();
if (sourceConnector != null && CanStartConnection(sourceConnector))
{
_sourceConnector = sourceConnector;
_lineGeometry = new LineGeometry();
_lineGeometry.StartPoint = _lineGeometry.EndPoint = e.GetPosition(_surface);
_path = new Path
{
Stroke = new SolidColorBrush(Colors.Black),
StrokeThickness = 2,
Data = _lineGeometry
};
_surface.Children.Add(_path);
return;
}
var designerControl = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), _surface).OfType<ActivityHost>().FirstOrDefault();
if (designerControl != null)
{
SelectItem(designerControl);
_clickPosition = e.GetPosition(designerControl);
_dragStarted = true;
return;
}
var link = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), _surface).OfType<LinkHost>().FirstOrDefault();
if (link != null)
{
SelectItem(link);
return;
}
SelectItem(null);
}