Output plots of breakdown of caving activity

[IdlePhysicist]

Have a view to select data to be plotted. I also think that this should be available to the user via cli flags. That would mean that the analysis code should be packaged separately to the gui and db code.

Plots would not displayed in app (unless that can be reliably achieved).

As an initial step I think that this should be implemented as a cli flag where all of the analysable metrics are outputted. I think the former should follow the lines of

cave-logger --analysis -o ./analysis-2020-08-14.pdf

This would mean that all the ground work of doing the various analyses would be completed and ready before any work is attempted on the gui.

[IdlePhysicist]

I have decided after looking at writing PDFs that it is better to generate temporary images, and render the “report” as HTML in a browser window. The user at that point can then “Print to PDF” if they so desire.

That means there will be no -o flag needed. The program would clean up the images on exit.