From 5c7fb5b7c927f674cdd74f1841bab886d072c2b7 Mon Sep 17 00:00:00 2001
From: Benjamin Root <ben.v.root@gmail.com>
Date: Thu, 28 May 2020 14:09:40 -0400
Subject: [PATCH] Backport PR #17408: FIX: cancel pending autoscale on manually
 setting limits

---
 lib/matplotlib/axes/_base.py      |  6 ++++++
 lib/matplotlib/tests/test_axes.py | 30 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
index 694945d57389..cc0c364ee05e 100644
--- a/lib/matplotlib/axes/_base.py
+++ b/lib/matplotlib/axes/_base.py
@@ -3220,6 +3220,9 @@ def set_xlim(self, left=None, right=None, emit=True, auto=False,
         left, right = sorted([left, right], reverse=bool(reverse))
 
         self._viewLim.intervalx = (left, right)
+        # Mark viewlims as no longer stale without triggering an autoscale.
+        for ax in self._shared_x_axes.get_siblings(self):
+            ax._stale_viewlim_x = False
         if auto is not None:
             self._autoscaleXon = bool(auto)
 
@@ -3611,6 +3614,9 @@ def set_ylim(self, bottom=None, top=None, emit=True, auto=False,
         bottom, top = sorted([bottom, top], reverse=bool(reverse))
 
         self._viewLim.intervaly = (bottom, top)
+        # Mark viewlims as no longer stale without triggering an autoscale.
+        for ax in self._shared_y_axes.get_siblings(self):
+            ax._stale_viewlim_y = False
         if auto is not None:
             self._autoscaleYon = bool(auto)
 
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 69b460a7e5f0..75636301d064 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -6694,3 +6694,33 @@ def test_invisible_axes():
     assert fig.canvas.inaxes((200, 200)) is not None
     ax.set_visible(False)
     assert fig.canvas.inaxes((200, 200)) is None
+
+
+@pytest.mark.parametrize('auto', (True, False, None))
+def test_unautoscaley(auto):
+    fig, ax = plt.subplots()
+    x = np.arange(100)
+    y = np.linspace(-.1, .1, 100)
+    ax.scatter(x, y)
+
+    post_auto = ax.get_autoscaley_on() if auto is None else auto
+
+    ax.set_ylim((-.5, .5), auto=auto)
+    assert post_auto == ax.get_autoscaley_on()
+    fig.canvas.draw()
+    assert_array_equal(ax.get_ylim(), (-.5, .5))
+
+
+@pytest.mark.parametrize('auto', (True, False, None))
+def test_unautoscalex(auto):
+    fig, ax = plt.subplots()
+    x = np.arange(100)
+    y = np.linspace(-.1, .1, 100)
+    ax.scatter(y, x)
+
+    post_auto = ax.get_autoscalex_on() if auto is None else auto
+
+    ax.set_xlim((-.5, .5), auto=auto)
+    assert post_auto == ax.get_autoscalex_on()
+    fig.canvas.draw()
+    assert_array_equal(ax.get_xlim(), (-.5, .5))