Bug 353492

We can draw orthogonal lines in Krita with v+shift. But we can't draw orthogonal rulers.
By orthogonal I mean horizontal and vertical to view (and why not 15° increments).

I need perfectly horizontal and vertical parallel rulers (depending on view) so I can draw pressure sensitive orthogonal lines all around. (Line tool doesn't simulate pressure).

Implementing orthogonal snap to rulers solves the issue which is to allow artists to draw instant orthogonal straight lines with pressure sensitivity drawing (the ones we get in photoshop by simply holding shift down).

Reproducible: Always