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Hot Topic (More than 10 Replies) "Funky" link when connecting shape to itself (Read 15496 times)
jlj30
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Re: "Funky" link when connecting shape to itself
Reply #15 - Dec 13th, 2013 at 4:51pm
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Hi,

Almost there!  Thanks for the code.
The last segment (or two?) does not render - see attached screenshot.

Here's my code (well mostly yours):

Code
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protected void createSelfLoopback(ShapeNode node, DiagramLink link)
    {
        RectangleF r = node.Bounds;
        float centerx = (float)(r.Left + r.Width / 2);
        float centerY = (float)(r.Top + r.Height / 2);
        float dist = 6;

        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));
    }

    protected void SetLinkPoints(DiagramLink link, params PointF[] points)
    {
        link.AutoRoute = false;
        link.Style = LinkStyle.Cascading;
        link.SegmentCount = (short)(points.Length - 1);
        link.ControlPoints.Clear();
        link.ControlPoints.AddRange(points);
        link.UpdateFromPoints();
    }


Any idea why the missing segment(s)?

Thanks

Jim
  
Self_Loopback_Link_Issue4_-_13Dec2013.png (Attachment deleted)
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Stoyo
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Re: "Funky" link when connecting shape to itself
Reply #16 - Dec 16th, 2013 at 7:58am
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Hi,

I have this SetLinkPoints version in my test project and it seems to work fine, try it instead:

Code
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void SetLinkPoints(DiagramLink link, params PointF[] points)
{
	link.AutoRoute = false;
	link.Shape = LinkShape.Cascading;
	link.ControlPoints.Clear();
	link.ControlPoints.AddRange(points);
	link.UpdateFromPoints(false, true);
}


I hope that helps,
Stoyan
  
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jlj30
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Re: "Funky" link when connecting shape to itself
Reply #17 - Dec 16th, 2013 at 4:00pm
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Hi Stoyan,

This latest code works just fine.
Many thanks.

Jim
  
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jlj30
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Re: "Funky" link when connecting shape to itself
Reply #18 - Jan 7th, 2014 at 4:06pm
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Hi again,

This was working just fine, but since upgrading to 5.0.3 the self-loopback connector is broken.  See the attached screenshot. 
I've included my latest code (that worked in 4.2) below.  I'm taking the Else path which should cause the link to come out of the top and back into the top.

Any suggestions?

Thanks

Jim

The Code:
Code
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protected void createSelfLoopback(ShapeNode node, DiagramLink link)
    {
        RectangleF r = node.Bounds;
        float dist = 6;

        if (node.Shape != Shapes.RoundRect)
        {
            float centerx = (float)(r.Left + r.Width / 2);
            float centerY = (float)(r.Top + r.Height / 2);

            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));
        }
        else
        {
            SetLinkPoints(link,
                new PointF(r.Right - 2, r.Top),
                new PointF(r.Right - 2, r.Top - 6),
                new PointF(r.Left + 2, r.Top - 6),
                new PointF(r.Left + 2, r.Top));
        }
    }

    protected void SetLinkPoints(DiagramLink link, params PointF[] points)
    {
        link.AutoRoute = false;
        link.Shape = LinkShape.Cascading;
        link.ControlPoints.Clear();
        link.ControlPoints.AddRange(points);
        link.UpdateFromPoints(false, true);
    }
  
Self_Loopback_Link_Issue_-_After_503.png (Attachment deleted)
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Stoyo
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Re: "Funky" link when connecting shape to itself
Reply #19 - Jan 7th, 2014 at 5:27pm
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Hi,

I can reproduce that if the node has anchor points at the left/right center points. Try also detaching the link from its anchor points before aplpying SwimlaneLayout:
Code
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protected void createSelfLoopback(ShapeNode node, DiagramLink link)
{
	link.OriginAnchor = link.DestinationAnchor = -1;


Version 4.2 might be ignoring anchor points for self loops, and it seems the new version does not.

I hope that helps,
Stoyan
  
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jlj30
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Re: "Funky" link when connecting shape to itself
Reply #20 - Jan 7th, 2014 at 7:13pm
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Stoyan,

That did it!
Thanks

Jim
  
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