+# The window's area is divided into a 4x4 grid of equally sized rectangles.
+# We return a resize direction depending on which rectangle was clicked,
+# according to the following diagram:
+#
+# ┏━━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━┓
+# ┃ NorthWest │ North │ NorthEast ┃
+# ┠───────────┼───────────┬───────────┼───────────┨
+# ┃ │ NorthWest │ NorthEast │ ┃
+# ┃ West ├───────────┼───────────┤ East ┃
+# ┃ │ SouthWest │ SouthEast │ ┃
+# ┠───────────┼───────────┴───────────┼───────────┨
+# ┃ SouthWest │ South │ SouthEast ┃
+# ┗━━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━┷━━━━━━━━━━━┛