From 1fa0c72b664afa4803dffd463ed11ce01632ab76 Mon Sep 17 00:00:00 2001
From: Thomas Holder <thomas@thomas-holder.de>
Date: Wed, 12 Sep 2018 16:43:47 +0200
Subject: New option to invert y-axis

Replaces all hard coded or implicit desktop coordinate usage with
doc2dt multiplication.

New global preference: Interface > Origin at upper left

https://bugs.launchpad.net/inkscape/+bug/170049
---
 src/display/canvas-grid.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/display/canvas-grid.cpp')

diff --git a/src/display/canvas-grid.cpp b/src/display/canvas-grid.cpp
index 42769e1b1..db765820f 100644
--- a/src/display/canvas-grid.cpp
+++ b/src/display/canvas-grid.cpp
@@ -389,7 +389,10 @@ void CanvasGrid::align_clicked(int align)
 {
     Geom::Point dimensions = doc->getDimensions();
     dimensions[Geom::X] *= align % 3 * 0.5;
-    dimensions[Geom::Y] *= 1 - (align / 3 * 0.5);
+    dimensions[Geom::Y] *= align / 3 * 0.5;
+    if (SP_ACTIVE_DESKTOP) {
+        dimensions = SP_ACTIVE_DESKTOP->doc2dt(dimensions);
+    }
     setOrigin(dimensions);
 }
 
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