Click here to Skip to main content
12,998,028 members (57,608 online)
Rate this:
Please Sign up or sign in to vote.
See more:
I'm using ZedGraph in my project and its awesome! But there is still one thing I cant figure out. Im looking for some possibility of plotting description of LineItem directly in chart, like on fig.:[^]

I tried to use TextObj, but still I have a problem correctly calculate the angle, it doesnt correspond to the slope of line:

// centre of line
PointPair pt = new PointPair(0.5 * (ptA.X + ptB.X), 0.5 * (ptA.Y + ptB.Y));
TextObj text = new TextObj("desc", pt.X, pt.Y, CoordType.AxisXYScale, AlignH.Center, AlignV.Center);
text.ZOrder = ZOrder.A_InFront;
double dX = ptB.X - ptA.X;
double dY = ptB.Y - ptA.Y;
float alfa = (float)(Math.Atan2(dY, dX) * (180.0 / Math.PI));
text.FontSpec.Angle = alfa;
Posted 6-Dec-12 12:46pm

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month

Advertise | Privacy | Mobile
Web02 | 2.8.170622.1 | Last Updated 6 Dec 2012
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100