internal static PathGeometry GetPathGeometry(ConnectorInfo source, ConnectorInfo sink)
{
var rectSource = GetRectWithMargin(source, 0);
var rectSink = GetRectWithMargin(sink, 13);
var startPoint = GetOffsetPoint(source, rectSource);
var endPoint = GetOffsetPoint(sink, rectSink);
var midpoint = CalculateMidpoint(startPoint, new Point(endPoint.X, startPoint.Y));
var distance = CalculateDistance(startPoint, midpoint);
var p1 = CalculateEndpoint(startPoint, distance, GetAngel(source.Orientation));
var p2 = CalculateEndpoint(endPoint, distance, GetAngel(sink.Orientation));
var p3 = endPoint;
var geometry = new PathGeometry();
var pathFigure = new PathFigure();
pathFigure.StartPoint = startPoint;
geometry.Figures.Add(pathFigure);
var bs = new BezierSegment(p1, p2, p3, true);
pathFigure.Segments.Add(bs);
return geometry;
}
private static Point GetOffsetPoint(ConnectorInfo connector, Rect rect)
{
Point offsetPoint = new Point();
switch (connector.Orientation)
{
case ConnectorOrientation.Left:
offsetPoint = new Point(rect.Left, connector.Position.Y);
break;
case ConnectorOrientation.Top:
offsetPoint = new Point(connector.Position.X, rect.Top);
break;
case ConnectorOrientation.Right:
offsetPoint = new Point(rect.Right, connector.Position.Y);
break;
case ConnectorOrientation.Bottom:
offsetPoint = new Point(connector.Position.X, rect.Bottom);
break;
default:
break;
}
return offsetPoint;
}
private static Rect GetRectWithMargin(ConnectorInfo connectorThumb, double margin)
{
Rect rect = new Rect(connectorThumb.DesignerItemLeft,
connectorThumb.DesignerItemTop,
connectorThumb.DesignerItemSize.Width,
connectorThumb.DesignerItemSize.Height);
rect.Inflate(margin, margin);
return rect;
}
internal ConnectorInfo GetInfo()
{
ConnectorInfo info = new ConnectorInfo();
info.DesignerItemLeft = DesignerCanvas.GetLeft(this.ParentDesignerItem);
info.DesignerItemTop = DesignerCanvas.GetTop(this.ParentDesignerItem);
info.DesignerItemSize = new Size(this.ParentDesignerItem.ActualWidth, this.ParentDesignerItem.ActualHeight);
info.Orientation = this.Orientation;
info.Position = this.Position;
return info;
}