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Normal Topic Any way to draw diagram wide line (Read 3534 times)
Kyle Chen
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Any way to draw diagram wide line
Jul 30th, 2013 at 3:35pm
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Hi,

Is there any way to create a line that will increase/decrease dynamically to diagram client width? even zoom in/out?

Thanks,

Kyle
  
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Stoyo
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Re: Any way to draw diagram wide line
Reply #1 - Jul 30th, 2013 at 5:18pm
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Hi,

You could call e.Graphics.DrawLine from DrawForeground or DrawBackground event handler. If the line position should depend on the currently visible part of the diagram, call view.ClientToDoc(view.ClientRectangle) to find it in document coordinates.

I hope that helps,
Stoyan
  
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Kyle Chen
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Re: Any way to draw diagram wide line
Reply #2 - Jul 31st, 2013 at 7:37pm
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Hi Stoyan,

Because the line I'd like to draw is a kind of separator like the lane grid. it will behind some nodes and in front of some other nodes. so it would be better a link line or node.

I'm currently dynamically calculate the width using both diagram content and diagram client size. It works not as good as expected especially zoom out.

Thanks,

Kyle
  
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Stoyo
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Re: Any way to draw diagram wide line
Reply #3 - Aug 1st, 2013 at 9:19am
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Hi,

Then you could create an unconnected link for separator, using the Factory.CreateDiagramLink(point, point) overload, and place it at appropriate ZIndex. You can later modify the end points from scroll and zoom changed event handlers. The points' X coordinates should correspond to Left and Right values of the rectangle returned by view.ClientToDoc(view.ClientRectangle).

Alternatively, just make the link as wide as diagram.Bounds, then you should always see some part of it inside the viewport.

I hope that helps,
Stoyan
  
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Kyle Chen
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Re: Any way to draw diagram wide line
Reply #4 - Aug 1st, 2013 at 2:24pm
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Thank you so much, Stoyan. I'm using ClientRectangle's left & right as lines' X now. It just works perfect!

Kyle
  
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