Advanced radials

[caerffili]

I want the ability to create intersecting radials that share the same screen real estate, for example the CPU usage forms the left half and GPU usage forms the right half. Best described on the screen shot-

As the radials overlap they would ordinarily overwrite and corrupt each other, unless I've missed something of course!!!!

I've implemented two new elements in the yaml for radials-

CUSTOM_BBOX: [0, 0, 80, 160]
TEXT_OFFSET: [-30, 0]

Custom BBox defines a boundary box which overrides the standard boundary box and effectively clips the radial image.

Text offset allows moving the text inside the boundary relative to the centre of the radial.

UPDATE - Added the ability to draw a background colour on the radial to highlight the full scale and the option to round off the end of the radial bars (draws an ellipse). New yaml to support this-

BAR_BACKGROUND_COLOR: 0, 50, 0
DRAW_BAR_BACKGROUND: True
BAR_DECORATION: Ellipse

[caerffili]

I think I found a bug fix in stats.py as well-

[mathoudebine]

Thanks for contributing! I will try to review it and integrate it soon 🙂