Cut corners in rectangular geometry

[Borys]

We have noticed that rectangular shapes is incorrectly rendered on
resize. Following code expected to add to the diagram resizable straight
rectangle:

 

           
diagram.AddShape(new RadDiagramShape

                            
{

                                
Geometry = geometry,

                                 BorderBrush
= Brushes.Green,

                                 StrokeThickness
= thickness,

                                 Position
= new Point(50, 50),

                                 Background
= Brushes.Transparent

                            
});

 

           
Instead it draws rectangle with excluded corners.

Moreover if rectangle is been resized user can see strange effect when set and configuration of excluded
corners are changing. See it in action on this video: https://www.youtube.com/watch?v=dK4mXmlEOhc

We are using Telerik WPF
2013.3.1016.40

How resolve this error?
It depends on RadiusX, RadiusY (e.g. there are less cut corners when both set to 0.009), but never completely resolved.

 

Please help us to workaround
this problem in version we use.

[Martin Ivanov]

Hi Borys,

Thank you for the video and the code snippet. However, I was not able to reproduce the described behavior. Can you please elaborate a little more on your scenario by sending me an isolated runnable code that contains the diagram (and it shapes') settings and the geometry for the shape?

Also it would be helpful if you could send me a project demonstrating the issue. This way I can test it locally and investigate the reason behind this behavior.

Thank you for any help you can provide.

Regards,
Martin
Telerik

 

 

[Martin Ivanov]

Hi Borys,

I am writing again because I misunderstand your requirement. Please excuse me for that.

Actually, the reported behavior is caused by the fact that the RadDiagramShapes expose a StrokeDashArray property that is bound to the Path's (that represents the shape geometry) StrokeDashArray and its default value is set to "1, 0" (or new DoubleCollection(1, 0)). 

To avoid the corner's clipping you can set the StrokeDashArray property to "Null" or "new DoubleCollection(0)".

shape = new RadDiagramShape
{
  .....
     StrokeDashArray = null,
  ...
};

Please try this and let me know if it works for you.

Regards,
Martin
Telerik

 

 

[Borys]

Works fine.
But I wish it would be more clear why it works like this.

[Martin Ivanov]

Hi Borys,

You can read more about the StrokeDashArray property in MSDN. Basically, it determines the pattern of the gaps used in the Stroke of the shape's geometry. As for choosing to set "1, 0" as a default value on the shapes, there is no particular reason that affects the diagrams' functionality. It is a design decision.

Please let me know if you have any further questions.

Regards,
Martin
Telerik