Implementing a vertical hairline cursor

Hi,

I have implemented a real-time plot in Qwt. Now I need to implement a vertical hairline cursor in my plot. When I click mouse on the plot, it should draw a vertical hairline at the point. I should be able to display the timestamp and the curve value at the corresponding point.

I guess it can be implemented using some sort of picker and marker, but I could not find an appropriate one or any examples using such things.

Can somebody advise? Thanks in advance.

Baas

What about the code you find in playground/curvetracker ?

Uwe

Thank you, Uwe. That works beautifully. I have got it working by using the same class CurveTracker.

I hadn't noticed the folder named playground containing more examples. I was looking at the folder named 'examples' only.

Thanks again.

Baas