Time/Date Axis

[sigger]

I've seen some old references to interest in a Time/Date axis. Has anyone done this yet, even in an alpha or beta stage? If not, we're interested in implementing this.

Specifically, we're looking to be able to specify the format of the numbers on the major tick of the axis. I believe that is (part of) the purpose of the QwtScaleEngine; please correct me if I am wrong.

I would like to tell the scale engine what format the major tick should appear in. For example, either "hh:mm:ss" or "hh:mm" or "mm/dd".

Being new to Qwt, I would love some guidance on what I need to subclass (if not just QwtScaleEngine) or otherwise do to implement this.

By the way, this being done in conjunction with an effort to implement a stock or securities charting QwtPlotItem to show OHLC bars (Open, High, Low, Close).

Many thanks.

- sigger