From d419d26345e1a7e6bc1deeb529224de4824c3cb3 Mon Sep 17 00:00:00 2001
From: Yan Wong <yan.wong@bdi.ox.ac.uk>
Date: Mon, 19 Aug 2024 00:14:27 +0200
Subject: [PATCH] Add "ago"

Fixes #2977
---
 python/tests/data/svg/tree_both_axes.svg        | 2 +-
 python/tests/data/svg/ts_max_trees.svg          | 2 +-
 python/tests/data/svg/ts_max_trees_treewise.svg | 2 +-
 python/tests/data/svg/ts_multiroot.svg          | 2 +-
 python/tests/data/svg/ts_plain_y.svg            | 2 +-
 python/tests/data/svg/ts_y_axis.svg             | 2 +-
 python/tests/data/svg/ts_y_axis_regular.svg     | 2 +-
 python/tests/test_drawing.py                    | 6 +++---
 python/tskit/drawing.py                         | 2 +-
 9 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/python/tests/data/svg/tree_both_axes.svg b/python/tests/data/svg/tree_both_axes.svg
index a86dd3d379..f90ce1c539 100644
--- a/python/tests/data/svg/tree_both_axes.svg
+++ b/python/tests/data/svg/tree_both_axes.svg
@@ -27,7 +27,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 70.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="131.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_max_trees.svg b/python/tests/data/svg/ts_max_trees.svg
index 3f3578de88..7720e50ece 100644
--- a/python/tests/data/svg/ts_max_trees.svg
+++ b/python/tests/data/svg/ts_max_trees.svg
@@ -73,7 +73,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time (generations)</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago (generations)</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_max_trees_treewise.svg b/python/tests/data/svg/ts_max_trees_treewise.svg
index 84b1929b02..0d1164dc65 100644
--- a/python/tests/data/svg/ts_max_trees_treewise.svg
+++ b/python/tests/data/svg/ts_max_trees_treewise.svg
@@ -47,7 +47,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time (generations)</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago (generations)</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_multiroot.svg b/python/tests/data/svg/ts_multiroot.svg
index 28dba3aa4e..fea6053303 100644
--- a/python/tests/data/svg/ts_multiroot.svg
+++ b/python/tests/data/svg/ts_multiroot.svg
@@ -139,7 +139,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time (generations)</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago (generations)</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_plain_y.svg b/python/tests/data/svg/ts_plain_y.svg
index 9e4499d3f7..9aa6f26c88 100644
--- a/python/tests/data/svg/ts_plain_y.svg
+++ b/python/tests/data/svg/ts_plain_y.svg
@@ -51,7 +51,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_y_axis.svg b/python/tests/data/svg/ts_y_axis.svg
index dccc399050..b1c5450b45 100644
--- a/python/tests/data/svg/ts_y_axis.svg
+++ b/python/tests/data/svg/ts_y_axis.svg
@@ -97,7 +97,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time (generations)</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago (generations)</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/data/svg/ts_y_axis_regular.svg b/python/tests/data/svg/ts_y_axis_regular.svg
index f5e4240cde..c73dc6f40c 100644
--- a/python/tests/data/svg/ts_y_axis_regular.svg
+++ b/python/tests/data/svg/ts_y_axis_regular.svg
@@ -97,7 +97,7 @@
 			</g>
 			<g class="y-axis">
 				<g class="title" transform="translate(0 65.7)">
-					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time</text>
+					<text class="lab" text-anchor="middle" transform="translate(11) rotate(-90)">Time ago</text>
 				</g>
 				<line class="ax-line" x1="56.8" x2="56.8" y1="121.4" y2="10"/>
 				<g class="ticks">
diff --git a/python/tests/test_drawing.py b/python/tests/test_drawing.py
index d9010b3c0b..95dbc4face 100644
--- a/python/tests/test_drawing.py
+++ b/python/tests/test_drawing.py
@@ -1,6 +1,6 @@
 # MIT License
 #
-# Copyright (c) 2018-2023 Tskit Developers
+# Copyright (c) 2018-2024 Tskit Developers
 # Copyright (C) 2017 University of Oxford
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -2697,7 +2697,7 @@ def test_known_svg_ts_y_axis(self, overwrite_viz, draw_plotbox):
         tables.time_units = "generations"
         ts = tables.tree_sequence()
         svg = ts.draw_svg(y_axis=True, debug_box=draw_plotbox)
-        assert "Time (generations)" in svg
+        assert "Time ago (generations)" in svg
         self.verify_known_svg(
             svg, "ts_y_axis.svg", overwrite_viz, width=200 * ts.num_trees
         )
@@ -2799,7 +2799,7 @@ def test_known_svg_ts_multiroot(self, overwrite_viz, draw_plotbox, caplog):
         self.verify_known_svg(
             svg, "ts_multiroot.svg", overwrite_viz, width=200 * ts.num_trees
         )
-        assert "Time (generations)" in svg
+        assert "Time ago (generations)" in svg
 
     def test_known_svg_ts_xlim(self, overwrite_viz, draw_plotbox, caplog):
         ts = self.get_simple_ts()
diff --git a/python/tskit/drawing.py b/python/tskit/drawing.py
index e7d412e98c..dcd0e03952 100644
--- a/python/tskit/drawing.py
+++ b/python/tskit/drawing.py
@@ -730,7 +730,7 @@ def __init__(
             if time_scale == "rank":
                 y_label = "Node time"
             else:
-                y_label = "Time"
+                y_label = "Time ago"
             if ts.time_units != tskit.TIME_UNITS_UNKNOWN:
                 y_label += f" ({ts.time_units})"
         self.x_label = x_label