Don't dispatch on_draw if the window is closed

CHANGELOG.md

@@ -3,6 +3,11 @@
 You can grab pre-release versions from PyPi. See the available versions from the
 Arcade [PyPi Release History](https://pypi.org/project/arcade/#history) page.
 
+## Unreleased
+
+- Fixed an issue causing a crash when closing the window
+- Added `Window.close` (bool) attribute indicating if the window is closed
+
 ## Version 3.2
 
 - GUI

arcade/application.py

@@ -172,6 +172,8 @@ def __init__(
             gl_version = 3, 1
             gl_api = "gles"
 
+        self.closed = False
+        """Indicates if the window was closed"""
         self.headless: bool = arcade.headless
         """If True, the window is running in headless mode."""
 
@@ -429,6 +431,7 @@ def run(self, view: View | None = None) -> None:
 
     def close(self) -> None:
         """Close the Window."""
+        self.closed = True
         super().close()
         # Make sure we don't reference the window any more
         set_window(None)
@@ -537,7 +540,10 @@ def _dispatch_frame(self, delta_time: float) -> None:
             # we only need the modulus to keep time, if we didn't care
             # it could be set to zero instead.
             # ! This should maybe be fixed at 'self._draw_rate', discuss.
-            self.draw(self._accumulated_draw_time)
+
+            # In case the window close in on_update, on_fixed_update or input callbacks
+            if not self.closed:
+                self.draw(self._accumulated_draw_time)
             self._accumulated_draw_time %= self._draw_rate
 
     def _dispatch_updates(self, delta_time: float) -> None: