Comment 1 for bug 1636154

Hi prkos,
I often use negative angles when drawing symmetric shapes, like +20° and -20° so the I-II quadrant convention (as you call it) would be inconvenient for me. This is only an example to say that the solution to the problem is not straightforward as the different conventions are all useful.
Also, one may prefer to see the III quadrant going from 180° to 270° rather than from -180° to -90° (and the IV from 270 to 359.9999...); or even have a clockwise positive going...
IMHO this is not really a point on general usability because it depends too much on what kind of drawings you're making and on the way you're used to think angles. You may have heard complaints about perceived inconsistencies but consider that users that don't find inconsistencies usually don't speak.

The only effective way I see to solve this issue could be to add an option on how angles should be displayed, giving some predefined choices (there are not so many, I think). Otherwise, the current implementation (that considers the point you drag in four quadrants ranging from -180° to 180°) seems the more natural and accurate to me.

Or maybe another simpler solution could be to add a button in the guides dialog to rotate the guide by 180° (ranging from -180° to 180°) so one could quickly adjust the displayed angle value to the preferred quadrant and convention.

+1 to have fractional digits (at least 1 or 2) shown in the status bar but I'd open a new report for this to give its own traceability (but first check if it already exists because I have some reminiscence).