Hi Stoyan,

A) Perfect

B) In addition to the code I sent you about the "ApproxBezier" crash I still get (see http://mindfusion.eu/Forum/YaBB.pl?board=fcnet_brep;action=display;num=124576041...), here is the LinkCreating code:

void Diagram_LinkCreating(object sender, LinkValidationEventArgs e)
{
    if (e.Link == null || e.Link.Origin == null || !(e.Link.Origin is TableNode))
    {
        e.Cancel = true;
        return;
    }

    // Draw bezier curve
    // Uses e.MousePosition as the endPt instead of calculating if from the link.
    this.Diagram.RouteLink(e.Link, e.MousePosition);

    // Equivalent to AllowUnconnectedLinks=TRUE, but with nice bezier links painting ;)
    if (e.Destination == null)
    {
        e.Cancel = true;
        return;
    }

    // Checks if the link is allowed
    bool linkValid = ValidateLink(e.Link, e.Destination, e.AnchorIndex, e.TableRow, false, false);
    e.Cancel = !linkValid;

    e.Link.ShadowColor = Color.Transparent;
} 

My (B) problem happens in RouteLink when I do UpdateFromPoints. In my test sample (lightly modified Entities sample), I don't get the crash, but the links don't get updated as a bezier (i.e. the links are straight instead of bezier curves when creating them). Once the're created, everything is fine (In my sample only since my real application crashes if the LinkCreating code is activate).
In my real application, even though the LinkCreating code and other related codes are almost the same (but not the anchor point's code), the links don't get updated while creating them (i.e. I get cascading links somehow but no bezier) and I also get a crash every time I am creating a link and go over an anchor point:

System.NullReferenceException was unhandled
  Message="La référence d'objet n'est pas définie à une instance d'un objet."
  Source="MindFusion.Diagramming"
  StackTrace:
       à MindFusion.Diagramming.DiagramLink.x0d5905a18dc24aa7(Boolean x1c5ff8c3c1ac16ad)
       à MindFusion.Diagramming.DiagramLink.UpdateFromPoints(Boolean updateGroups)
       à MindFusion.Diagramming.DiagramLink.UpdateFromPoints()
       à [...].RouteLink(DiagramLink link, PointF endPt, Boolean verbose) dans [...]
       à [...].Diagram_LinkCreating(Object sender, LinkValidationEventArgs e) dans [...]
       à MindFusion.Diagramming.Diagram.OnLinkCreating(LinkValidationEventArgs e)
 

So my problems are
(1) The crash in UpdateFromPoints
(2) The fact that I can't have bezier-looking links while creating them.
(3) The crash as described in my other post (in MindFusion.Utilities.ApproxBezier(PointF[] points, Int32 startIdx, Int32 quality))

Thanks!
Marie

Edit: I forgot to set Diagram.AllowUnconnectedLinks to true... When it is, I get the UpdateFromPoints crash every time LinkCreating gets called (i.e. almost at the moment I start creating a link), not just when over an anchor point (I don't event get there anymore).

Hi Stoyan,

I just sent you the code.

Thanks agains !
Marie

Sent.

Thanks,
Marie

Hi Stoyan,

I don't understand why I should update SegmentCount. My links should always be Bezier and my default SegmentCount in diagram is 1. I don't change it anywhere. I tried adding it but it doesn't work. However, if it's quick, I don't mind doing it.

I replaced my control points setting code by the following (your code but without the link style assignment) in my RouteLink method:

private static void SetLinkPoints(DiagramLink link, params PointF[] points)
{
    link.AutoRoute = false;
    link.SegmentCount = link.Style != LinkStyle.Bezier ? (short)(points.Length - 1) : (short)((points.Length - 1) / 3);
    //link.Style = LinkStyle.Cascading;     // I want Bezier curves!!! not cascading!
    link.ControlPoints.Clear();
    link.ControlPoints.AddRange(points);
    link.UpdateFromPoints();
} 

I still get the UpdateFromPoints crash:

System.NullReferenceException was unhandled
  Message="La référence d'objet n'est pas définie à une instance d'un objet."
  Source="MindFusion.Diagramming"
  StackTrace:
       à MindFusion.Diagramming.DiagramLink.x0d5905a18dc24aa7(Boolean x1c5ff8c3c1ac16ad)
       à MindFusion.Diagramming.DiagramLink.UpdateFromPoints(Boolean updateGroups)
       à MindFusion.Diagramming.DiagramLink.UpdateFromPoints()
       à [...].SetLinkPoints(DiagramLink link, PointF[] points) 

So my problems have not changed:
(1) The crash in UpdateFromPoints
(2) The fact that I can't have bezier-looking links while creating them.
(3) The crash as described in my other post (in MindFusion.Utilities.ApproxBezier(PointF[] points, Int32 startIdx, Int32 quality))

Did you successfully get bezier-looking links while creating them?

I'll try with the new version just in case (I want to use it anyway). Even though I asked previously to receive the version emails, it seems that this time it didn't work... Could you send me the version for my company please?

Thank you.
Marie

Hi Stoyan,

I received the upgrade link successfully and installed the new version .

My code now looks like:

private static void SetLinkPoints(DiagramLink link, params PointF[] points)
{
    link.AutoRoute = false;
    link.SegmentCount = link.Style != LinkStyle.Bezier ? (short)(points.Length - 1) : (short)((points.Length - 1) / 3);
    //link.Style = LinkStyle.Cascading;     // I want Bezier curves!!! not cascading!
    link.ControlPoints.Clear();
    link.ControlPoints.AddRange(points);
    link.UpdateFromPoints(true, true);
} 

(I now have access to UpdateFromPoints parameters).

I still get the same crash, but with different stack trace. Here it is (in case it helps you):

System.NullReferenceException was unhandled
  Message="La référence d'objet n'est pas définie à une instance d'un objet."
  Source="MindFusion.Diagramming"
  StackTrace:
 à MindFusion.Diagramming.DiagramLink.xb05f5d996d82647f(Anchoring x7ba664bd6885b404, Boolean x49743b78538984b7)
 à MindFusion.Diagramming.DiagramLink.xb05f5d996d82647f(Anchoring x7ba664bd6885b404)
 à MindFusion.Diagramming.DiagramLink.set_SegmentCount(Int16 value)
 à [...].SetLinkPoints(DiagramLink link, PointF[] points) 

Since LinkCreating doesn't work, do you have an idea of how to do it (have bezier-looking links during creation)?

Thanks,
Marie

Hi Stoyan,

Thanks for your suggestions. They'll be tried later .

Thanks,
Marie