How show custom text with QwtPlotpicker

[Michael M. <mm...@mo...>]

I have a QwtPlot which shows several temperature curves (y-axis) over the
time (x-axis). The time is internally stored as seconds. The x-scale shows
the time in h:m:s format. QwtPlotPicker shows the x value as seconds. How
can I change this to h:m:s?

I use QWT 5.2.0

Michael