Hi,

Have a look at the attached screenshot.
There are 2 shapes which have links that should (and do) come out of the right and into the left of themselves.

I was expecting the links to look much like they do for the other shapes on the diagram (straight segments with rounded corners), but instead I got these rather strange looking links.

Is there any particular setting/property I need to correct this odd appearance?

I've also included my diagram settings below.

Thanks in advance.

Jim

diagram.DrawLink += OnDrawLink; // Add an event handler to draw images on links if they exist
		diagram.EnableShadowEffects = true;
		diagram.ShowGrid = false;
		diagram.GridColor = Color.LightGray;
		diagram.GridStyle = GridStyle.Lines;
		diagram.AlignToGrid = true;
		diagram.MeasureUnit = GraphicsUnit.Millimeter;
		diagram.LinkStyle = LinkStyle.Cascading;
		diagram.LinkCascadeOrientation = Orientation.Auto;
		diagram.DynamicLinks = false;  // recommendation from MF to set to false - see http://mindfusion.eu/Forum/YaBB.pl?num=1372368535
		diagram.EnableLanes = true;
		diagram.GridOffsetX = 4;
		diagram.GridOffsetY = 4;
		//diagram.Bounds = new RectangleF(0, 0, 500, 400);
		diagram.LinkCrossings = LinkCrossings.Arcs;
		diagram.EnableStyledText = true;
		diagram.PolygonalTextLayout = true;
		diagram.LinkSegments = 2;
		diagram.SnapToAnchor = SnapToAnchor.OnCreateOrModify;
		diagram.LinkEndsMovable = true;
		diagram.DefaultShape = Shapes.RoundRect;
		diagram.LinkTextStyle = LinkTextStyle.OverLongestSegment;
		diagram.RoundedLinks = true;
		diagram.ShowAnchors = ShowAnchors.Selected;
		diagram.AutoResize = AutoResize.RightAndDown;
		diagram.ContainersFoldable = true;
		diagram.LinkCascadeOrientation = Orientation.Auto;
		diagram.LinkRouter = new GridRouter();
		//diagram.LinkRouter = new QuickRouter();
		diagram.RouteLinks = true;
		diagram.RoutingOptions.Anchoring = Anchoring.Keep;
		diagram.RoutingOptions.CrossingCost = 50;
		diagram.RoutingOptions.LengthCost = 10;
		diagram.RoutingOptions.NodeVicinityCost = 5;
		diagram.RoutingOptions.TurnCost = 10;

		diagram.EnableLanes = true;
		diagram.LinkHeadShape = ArrowHeads.Triangle;
		diagram.LinkHeadShapeSize = 4;
		diagram.BackBrush = new MindFusion.Drawing.SolidBrush(Color.White); 

Hi,

This sounds like the solution I need, but SetSelfLoopShape does appear as an event I can select for the diagram object.

See the attached screenshot.

My Webfroms.dll version is 4.2.1.15465

Jim

Hi,

I tried to use the LinkCreated and LinkModified events, but neither seem to fire.  I put breaks in the event handler and it never received control.

Here's the relevant pieces of my code:

diagram.DrawLink += OnDrawLink; // Add an event handler to draw images on links if they exist
        diagram.LinkCreated += OnLinkCreated; // Add an event handler to change the bezier curve to cascade for self loopbacks
        diagram.LinkModified += OnLinkCreated;

...

protected void OnLinkCreated(object sender, LinkEventArgs e)
    {
        DiagramLink link = e.Link;
        if (link.Origin == link.Destination)
        {
            link.Style = LinkStyle.Cascading; // The default for self loopbacks is Bezier ("funky")
        }
    }
 

The DrawLink event fires just fine.
I noticed in my code that I had to include the following statement to get this event to fire:

link.CustomDraw = CustomDraw.Additional;

Is there something similar that I need to do to get the LinkCreated event to fire?

Jim

Hi,

In ASP.NET version you should handle the LinkCreated and LinkModified events of DiagramView. However they are raised only for links drawn interactively by user. If you create these links programmatically, reset their Shape to Cascading immediately after calling Factory.CreateDiagramLink(same_node, same_node).

I hope that helps,
Stoyan

Hi,

It's called Shape in newer versions, where the DiagramItem.Style property is used for appearance styling. Try setting link.SegmentCount = 3 before changing Shape to Cascading.

I hope that helps,
Stoyan

Call link.Route(), or try the code from http://mindfusion.eu/Forum/YaBB.pl?num=1238435923/5#5

If you are using the code from http://mindfusion.eu/Forum/YaBB.pl?num=1238435923/5#5, move SegmentCount assignment in front of Style.Cascading assignment. Otherwise the link might remain a Bezier, which expects a different number of points per segment and setting the new points might fail.

I hope that helps,
Stoyan

Hi,

I assume you are calling Route then. The auto-routing function treats all nodes as rectangular obstacles, so decision nodes' shape should not matter. Check if you aren't processing decisions' links later in some way that would reset them to a single segment.

You cannot limit auto-routes to a single lane at this time, so try setting the link points yourself. The sample code from the post above connected top to bottom center points. To connect right to left centers, change it to this:

SetLinkPoints(link,
	new PointF(r.Right, centerY),
	new PointF(r.Right + dist, centerY),
	new PointF(r.Right + dist, r.Top - dist),
	new PointF(r.Left - dist, r.Top - dist),
	new PointF(r.Left - dist, centerY),
	new PointF(r.Left, centerY)); 

I hope that helps,
Stoyan