/// <summary>
/// Create and apply edge path using calculated ER parameters stored in edge
/// </summary>
/// <param name="useCurrentCoords">Use current vertices coordinates or final coorfinates (for.ex if move animation is active final coords will be its destination)</param>
/// <param name="externalRoutingPoints">Provided custom routing points will be used instead of stored ones.</param>
/// <param name="updateLabel">Should edge label be updated in this pass</param>
public virtual void PrepareEdgePath(bool useCurrentCoords = false, Measure.Point[] externalRoutingPoints = null, bool updateLabel = true)
{
//do not calculate invisible edges
if ((Visibility != Visibility.Visible && !IsHiddenEdgesUpdated) && Source == null || Target == null || ManualDrawing || !IsTemplateLoaded)
{
return;
}
#region Get the inputs
//get the size of the source
var sourceSize = new Size
{
Width = Source.ActualWidth,
Height = Source.ActualHeight
};
if (CustomHelper.IsInDesignMode(this))
{
sourceSize = new Size(80, 20);
}
//get the position center of the source
var sourcePos = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Source) : GraphAreaBase.GetFinalX(Source)) + sourceSize.Width * .5,
Y = (useCurrentCoords ? GraphAreaBase.GetY(Source) : GraphAreaBase.GetFinalY(Source)) + sourceSize.Height * .5
};
//get the size of the target
var targetSize = new Size
{
Width = Target.ActualWidth,
Height = Target.ActualHeight
};
if (CustomHelper.IsInDesignMode(this))
{
targetSize = new Size(80, 20);
}
//get the position center of the target
var targetPos = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Target) : GraphAreaBase.GetFinalX(Target)) + targetSize.Width * .5,
Y = (useCurrentCoords ? GraphAreaBase.GetY(Target) : GraphAreaBase.GetFinalY(Target)) + targetSize.Height * .5
};
var routedEdge = Edge as IRoutingInfo;
if (routedEdge == null)
{
throw new GX_InvalidDataException("Edge must implement IRoutingInfo interface");
}
//get the route informations
var routeInformation = externalRoutingPoints ?? routedEdge.RoutingPoints;
// Get the TopLeft position of the Source Vertex.
var sourcePos1 = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Source) : GraphAreaBase.GetFinalX(Source)),
Y = (useCurrentCoords ? GraphAreaBase.GetY(Source) : GraphAreaBase.GetFinalY(Source))
};
// Get the TopLeft position of the Target Vertex.
var targetPos1 = new Point
{
X = (useCurrentCoords ? GraphAreaBase.GetX(Target) : GraphAreaBase.GetFinalX(Target)),
Y = (useCurrentCoords ? GraphAreaBase.GetY(Target) : GraphAreaBase.GetFinalY(Target))
};
var hasEpSource = EdgePointerForSource != null;
var hasEpTarget = EdgePointerForTarget != null;
#endregion
//if self looped edge
if (IsSelfLooped)
{
PrepareSelfLoopedEdge(sourcePos1);
return;
}
//check if we have some edge route data
var hasRouteInfo = routeInformation != null && routeInformation.Length > 1;
//calculate source and target edge attach points
if (RootArea != null && !hasRouteInfo && RootArea.EnableParallelEdges && ParallelEdgeOffset != 0)
{
sourcePos = GetParallelOffset(Source, Target, ParallelEdgeOffset);
targetPos = GetParallelOffset(Target, Source, -ParallelEdgeOffset);
}
/* Rectangular shapes implementation by bleibold */
var gEdge = Edge as IGraphXCommonEdge;
Point p1;
Point p2;
//calculate edge source (p1) and target (p2) endpoints based on different settings
if (gEdge?.SourceConnectionPointId != null)
{
var sourceCp = Source.GetConnectionPointById(gEdge.SourceConnectionPointId.Value, true);
if (sourceCp == null)
{
throw new GX_ObjectNotFoundException(string.Format("Can't find source vertex VCP by edge source connection point Id({1}) : {0}", Source, gEdge.SourceConnectionPointId));
}
if (sourceCp.Shape == VertexShape.None)
{
p1 = sourceCp.RectangularSize.Center();
}
else
{
var targetCpPos = gEdge.TargetConnectionPointId.HasValue ? Target.GetConnectionPointById(gEdge.TargetConnectionPointId.Value, true).RectangularSize.Center() : (hasRouteInfo ? routeInformation[1].ToWindows() : (targetPos));
p1 = GeometryHelper.GetEdgeEndpoint(sourceCp.RectangularSize.Center(), sourceCp.RectangularSize, targetCpPos, sourceCp.Shape);
}
}
else
{
p1 = GeometryHelper.GetEdgeEndpoint(sourcePos, new SysRect(sourcePos1, sourceSize), (hasRouteInfo ? routeInformation[1].ToWindows() : (targetPos)), Source.VertexShape);
}
if (gEdge?.TargetConnectionPointId != null)
{
var targetCp = Target.GetConnectionPointById(gEdge.TargetConnectionPointId.Value, true);
if (targetCp == null)
{
throw new GX_ObjectNotFoundException(string.Format("Can't find target vertex VCP by edge target connection point Id({1}) : {0}", Target, gEdge.TargetConnectionPointId));
}
if (targetCp.Shape == VertexShape.None)
{
p2 = targetCp.RectangularSize.Center();
}
else
{
var sourceCpPos = gEdge.SourceConnectionPointId.HasValue ? Source.GetConnectionPointById(gEdge.SourceConnectionPointId.Value, true).RectangularSize.Center() : hasRouteInfo ? routeInformation[routeInformation.Length - 2].ToWindows() : (sourcePos);
p2 = GeometryHelper.GetEdgeEndpoint(targetCp.RectangularSize.Center(), targetCp.RectangularSize, sourceCpPos, targetCp.Shape);
}
}
else
{
p2 = GeometryHelper.GetEdgeEndpoint(targetPos, new SysRect(targetPos1, targetSize), hasRouteInfo ? routeInformation[routeInformation.Length - 2].ToWindows() : (sourcePos), Target.VertexShape);
}
SourceConnectionPoint = p1;
TargetConnectionPoint = p2;
Linegeometry = new PathGeometry();
PathFigure lineFigure;
//if we have route and route consist of 2 or more points
if (RootArea != null && hasRouteInfo)
{
//replace start and end points with accurate ones
var routePoints = routeInformation.ToWindows().ToList();
routePoints.Remove(routePoints.First());
routePoints.Remove(routePoints.Last());
routePoints.Insert(0, p1);
routePoints.Add(p2);
if (externalRoutingPoints == null && routedEdge.RoutingPoints != null)
{
routedEdge.RoutingPoints = routePoints.ToArray().ToGraphX();
}
if (RootArea.EdgeCurvingEnabled)
{
var oPolyLineSegment = GeometryHelper.GetCurveThroughPoints(routePoints.ToArray(), 0.5, RootArea.EdgeCurvingTolerance);
if (hasEpTarget)
{
UpdateTargetEpData(oPolyLineSegment.Points[oPolyLineSegment.Points.Count - 1], oPolyLineSegment.Points[oPolyLineSegment.Points.Count - 2]);
oPolyLineSegment.Points.RemoveAt(oPolyLineSegment.Points.Count - 1);
}
if (hasEpSource)
{
UpdateSourceEpData(oPolyLineSegment.Points.First(), oPolyLineSegment.Points[1]);
oPolyLineSegment.Points.RemoveAt(0);
}
lineFigure = GeometryHelper.GetPathFigureFromPathSegments(routePoints[0], true, true, oPolyLineSegment);
#if WPF
//freeze and create resulting geometry
GeometryHelper.TryFreeze(oPolyLineSegment);
#endif
}
else
{
if (hasEpSource)
{
routePoints[0] = routePoints[0].Subtract(UpdateSourceEpData(routePoints.First(), routePoints[1]));
}
if (hasEpTarget)
{
routePoints[routePoints.Count - 1] = routePoints[routePoints.Count - 1].Subtract(UpdateTargetEpData(p2, routePoints[routePoints.Count - 2]));
}
// Reverse the path if specified.
if (gEdge.ReversePath)
{
routePoints.Reverse();
}
var pcol = new PointCollection();
routePoints.ForEach(a => pcol.Add(a));
lineFigure = new PathFigure {
StartPoint = p1, Segments = new PathSegmentCollection {
new PolyLineSegment {
Points = pcol
}
}, IsClosed = false
};
}
}
else // no route defined
{
bool allowUpdateEpDataToUnsuppress = true;
//check for hide only if prop is not 0
if (HideEdgePointerByEdgeLength != 0d)
{
if (MathHelper.GetDistanceBetweenPoints(p1, p2) <= HideEdgePointerByEdgeLength)
{
EdgePointerForSource?.Suppress();
EdgePointerForTarget?.Suppress();
allowUpdateEpDataToUnsuppress = false;
}
else
{
EdgePointerForSource?.UnSuppress();
EdgePointerForTarget?.UnSuppress();
}
}
if (hasEpSource)
{
p1 = p1.Subtract(UpdateSourceEpData(p1, p2, allowUpdateEpDataToUnsuppress));
}
if (hasEpTarget)
{
p2 = p2.Subtract(UpdateTargetEpData(p2, p1, allowUpdateEpDataToUnsuppress));
}
lineFigure = new PathFigure {
StartPoint = gEdge.ReversePath ? p2 : p1, Segments = new PathSegmentCollection {
new LineSegment()
{
Point = gEdge.ReversePath ? p1 : p2
}
}, IsClosed = false
};
}
((PathGeometry)Linegeometry).Figures.Add(lineFigure);
#if WPF
GeometryHelper.TryFreeze(lineFigure);
GeometryHelper.TryFreeze(Linegeometry);
#endif
if (ShowLabel && EdgeLabelControl != null && _updateLabelPosition && updateLabel)
{
EdgeLabelControl.UpdatePosition();
}
}
private Point UpdateTargetEpData(Point from, Point to, bool allowUnsuppress = true)
{
var dir = MathHelper.GetDirection(from, to);
if (from == to)
{
if (HideEdgePointerOnVertexOverlap)
{
EdgePointerForTarget.Suppress();
}
else
{
dir = new Vector(0, 0);
}
}
else if (allowUnsuppress)
{
EdgePointerForTarget.UnSuppress();
}
var result = EdgePointerForTarget.Update(from, dir, EdgePointerForTarget.NeedRotation ? (-MathHelper.GetAngleBetweenPoints(from, to).ToDegrees()) : 0);
return(EdgePointerForTarget.Visibility == Visibility.Visible ? result : new Point());
}