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[Thorjelly <thorjelly@xxxxxxxxx>]

This might seem very naive, but why do you actually have to change the
internal coordinate system? Can't you add an option in user preferences
or document preferences, which in the latter case could be added as
metadata to not affect backwards compatibility, to where 0,0 should be
and have it only affect the user interface? Simply translate what
coordinates are displayed for an object in the user interface, without
changing the internal coordinate system. This should be an extremely
simple mathematical translation, and the coordinates can be translated
back internally when the document is saved so no internal coordinates
need to change, and no previous documents need to be broken. I'm sure
there are already translations for object coordinates for specific
formats when they are saved since SVG files assume 0,0 is top left.

This seems like a perfectly fine and elegant solution; it even seems
like it should be preferential to me than implementing a system where
all internal coordinates are absolute and revolve around a user-given
origin, because a user changing the origin doesn't also change every
single coordinate in the file, it only changes how coordinates are
displayed in the user interface. To me it seems preferential, because
any coordinate system change only affects the mathematical translation
and not every single point in the system.

I'm literally just talking about translating the x and y values
displayed to the user in the top bar by adding a function. What is wrong
with this solution?

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to inkscape in Ubuntu.
https://bugs.launchpad.net/bugs/170049

Title:
  Inverted ruler co-ordinate system

Status in Inkscape:
  Triaged
Status in inkscape package in Ubuntu:
  Triaged

Bug description:
  The y-axis of the rulers' co-ordinate system is
  inverted (increasing upwards), and places the origin on
  the bottom left of the viewport. The SVG spec places the
  default origin on the top left of the viewport, and has
  the co-ordinate system increasing to the right and
  downwards.

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