From d3aff8bc3631841ed2517a9d4ab881d7da3244ea Mon Sep 17 00:00:00 2001
From: Aaron Ayres <aayres@enthought.com>
Date: Wed, 9 Jun 2021 09:02:09 -0500
Subject: [PATCH] readd points_in_polygon to kiva.agg

---
 kiva/agg/__init__.py                 | 19 +++++++++++++++++++
 kiva/tests/test_points_in_polygon.py | 14 ++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/kiva/agg/__init__.py b/kiva/agg/__init__.py
index 2a60e9785..6f569e00c 100644
--- a/kiva/agg/__init__.py
+++ b/kiva/agg/__init__.py
@@ -57,3 +57,22 @@ def __init__(self, size, pix_format=default_pix_format,
     warnings.warn("Error initializing Agg: %s" % ex, Warning, 2)
 
     GraphicsContextSystem = None
+
+
+def points_in_polygon(pts, poly_pts, use_winding=False):
+    """Keep this function around for old code, but warn anyone who calls it.
+    """
+    import inspect
+    import warnings
+    from kiva.api import points_in_polygon as new_points_in_polygon
+
+    msg = "points_in_polygon() has moved to kiva.api"
+    frame = inspect.currentframe().f_back
+    warnings.warn_explicit(
+        msg,
+        category=DeprecationWarning,
+        filename=inspect.getfile(frame.f_code),
+        lineno=frame.f_lineno,
+    )
+
+    new_points_in_polygon(pts, poly_pts, use_winding=use_winding)
diff --git a/kiva/tests/test_points_in_polygon.py b/kiva/tests/test_points_in_polygon.py
index 6db3c7e7d..81ea40546 100644
--- a/kiva/tests/test_points_in_polygon.py
+++ b/kiva/tests/test_points_in_polygon.py
@@ -8,13 +8,27 @@
 #
 # Thanks for using Enthought open source!
 import unittest
+import warnings
 
 from numpy import allclose, array, zeros
 
+from kiva.agg import points_in_polygon as points_in_polygon_deprecated
 from kiva.api import points_in_polygon
 
 
 class TestPointsInPolygon(unittest.TestCase):
+    def test_deprecated_import(self):
+        polygon = array(((0.0, 0.0), (10.0, 0.0), (0.0, 10.0)))
+        points = array(((5.0, 5.0),))
+
+        with warnings.catch_warnings(record=True) as collector:
+            warnings.simplefilter("always")
+            points_in_polygon_deprecated(points, polygon)
+
+            assert len(collector) == 1
+            warn = collector[0]
+            assert issubclass(warn.category, DeprecationWarning)
+
     def test_empty_points_in_polygon(self):
         polygon = array(((0.0, 0.0), (10.0, 0.0), (10.0, 10.0), (0.0, 10.0)))
         points = zeros((0, 2))