From fbe3c0fd1ae03270aab52f880f01a91aa828999d Mon Sep 17 00:00:00 2001
From: Lukas Schrangl <lukas.schrangl@boku.ac.at>
Date: Thu, 11 Dec 2025 14:19:26 +0100
Subject: [PATCH] Update `matplotlib.rcParams.validate` instead of overwriting

Other packages can update `rcParams.validate` as well. Overwriting can
therefore lead to problems.
---
 matplotlib_scalebar/scalebar.py | 46 ++++++++++++++-------------------
 1 file changed, 19 insertions(+), 27 deletions(-)

diff --git a/matplotlib_scalebar/scalebar.py b/matplotlib_scalebar/scalebar.py
index efd5a5d..7630681 100644
--- a/matplotlib_scalebar/scalebar.py
+++ b/matplotlib_scalebar/scalebar.py
@@ -96,33 +96,25 @@ def _validate_legend_loc(loc):
     return loc
 
 
-defaultParams.update(
-    {
-        "scalebar.length_fraction": [0.2, validate_float],
-        "scalebar.width_fraction": [0.01, validate_float],
-        "scalebar.location": ["upper right", _validate_legend_loc],
-        "scalebar.pad": [0.2, validate_float],
-        "scalebar.border_pad": [0.1, validate_float],
-        "scalebar.sep": [5, validate_float],
-        "scalebar.frameon": [True, validate_bool],
-        "scalebar.color": ["k", validate_color],
-        "scalebar.box_color": ["w", validate_color],
-        "scalebar.box_alpha": [1.0, validate_float],
-        "scalebar.scale_loc": ["bottom", _validate_scale_loc],
-        "scalebar.label_loc": ["top", _validate_label_loc],
-        "scalebar.rotation": ["horizontal", _validate_rotation],
-    }
-)
-
-
-_all_deprecated = getattr(matplotlib, "_all_deprecated", {})
-
-
-# Recreate the validate function
-matplotlib.rcParams.validate = dict(
-    (key, converter)
-    for key, (default, converter) in defaultParams.items()
-    if key not in _all_deprecated
+scalebar_params = {
+    "scalebar.length_fraction": [0.2, validate_float],
+    "scalebar.width_fraction": [0.01, validate_float],
+    "scalebar.location": ["upper right", _validate_legend_loc],
+    "scalebar.pad": [0.2, validate_float],
+    "scalebar.border_pad": [0.1, validate_float],
+    "scalebar.sep": [5, validate_float],
+    "scalebar.frameon": [True, validate_bool],
+    "scalebar.color": ["k", validate_color],
+    "scalebar.box_color": ["w", validate_color],
+    "scalebar.box_alpha": [1.0, validate_float],
+    "scalebar.scale_loc": ["bottom", _validate_scale_loc],
+    "scalebar.label_loc": ["top", _validate_label_loc],
+    "scalebar.rotation": ["horizontal", _validate_rotation],
+}
+defaultParams.update(scalebar_params)
+# Update the validate function
+matplotlib.rcParams.validate.update(
+    dict((key, converter) for key, (_, converter) in scalebar_params.items())
 )
 
 # Dimension lookup