Hi,

I'm trying to use annotations to write some labels between some points, meaning, I want to make a chart like the attach image.

All the text refers to the line series, [x0,y0 - x1,y1].


With the annotations it didn't went well, because I needed a range anchor annotation.

Other approach, was to use data labels in Float Bar Series, but there is no way to clip the labels.

Can you please advise.


Thanks for any ideas,
Ricardo

Hi Ricardo,

You can try to use custom painting - All Examples\Custom Painting - as it allows you to have full control over the text angle and position. You can use the NScale2DToViewTransformation object to transform scale coordinate to view coordinates - for example:

NScale2DToViewTransformation transform = new NScale2DToViewTransformation(nChartControl1.View.Context, chart, (int)StandardAxis.PrimaryX, (int)StandardAxis.PrimaryY);

NPointF start = new NPointF();
NPointF end = new NPointF();

transform.Transform(new NVector2DD(x0, y0), ref start);
transform.Transform(new NVector2DD(x1, y1), ref end);

will return the start and end points of a line segment defined by [x0, y0] - [x1, y1] in view coordinates, which you can use to draw custom annotations.

Hope this helps - let us know if you meet any problems.

 

Best Regards,
Nevron Support Team

Thanks,

I will try that.