Fixed cocoa delegate

cocoa/src/toga_cocoa/window.py

@@ -2,7 +2,6 @@
  SEL,
  CGSize,
  NSMakeRect,
- NSObject,
  NSPoint,
  NSSize,
  objc_method,
@@ -51,7 +50,7 @@ def windowWillClose_(self, notification) -> None:
  # the delegates and still triggers the delegate events.
 
  # Assign an empty base NSObject to the window delegate.
- self.delegate = NSObject.alloc().init()
+ # self.delegate = NSObject.alloc().init()
 
  # Assigning the toolbar delegate to an empty base NSObject
  # doesn't work as it requires conformity to the NSToolbarDelegate,
@@ -67,7 +66,7 @@ def windowWillClose_(self, notification) -> None:
 
  @objc_method
  def windowDidResize_(self, notification) -> None:
- if self.interface.content:
+ if self.interface and self.interface.content:
  # Set the window to the new size
  self.interface.content.refresh()
 
@@ -90,7 +89,8 @@ def enteredMiniaturize_(self, sender) -> None:
 
  @objc_method
  def windowDidDeminiaturize_(self, notification) -> None:
- self.impl._apply_state(self.impl._pending_state_transition)
+ if self.impl:
+ self.impl._apply_state(self.impl._pending_state_transition)
 
  @objc_method
  def windowDidEnterFullScreen_(self, notification) -> None:
@@ -101,17 +101,19 @@ def enteredFullScreen_(self, sender) -> None:
  # Doing the following directly in `windowDidEnterFullScreen_` will result in error:
  # ````2024-08-09 15:46:39.050 python[2646:37395] not in fullscreen state````
  # and any subsequent window state calls to the OS will not work or will be glitchy.
- if (
- self.impl._pending_state_transition
- and self.impl._pending_state_transition != WindowState.FULLSCREEN
- ):
- self.impl._apply_state(WindowState.NORMAL)
- else:
- self.impl._pending_state_transition = None
+ if self.impl:
+ if (
+ self.impl._pending_state_transition
+ and self.impl._pending_state_transition != WindowState.FULLSCREEN
+ ):
+ self.impl._apply_state(WindowState.NORMAL)
+ else:
+ self.impl._pending_state_transition = None
 
  @objc_method
  def windowDidExitFullScreen_(self, notification) -> None:
- self.impl._apply_state(self.impl._pending_state_transition)
+ if self.impl:
+ self.impl._apply_state(self.impl._pending_state_transition)
 
  ######################################################################
  # Toolbar delegate methods

testbed/tests/window/test_window.py

@@ -777,7 +777,7 @@ async def test_window_state_direct_change(
  # Set to final state
  second_window.state = final_state
  # Add delay to ensure windows are visible after animation.
- await app_probe.redraw(f"Secondary window is in {final_state}", delay=1.65)
+ await app_probe.redraw(f"Secondary window is in {final_state}", delay=1.5)
  assert second_window.state == final_state
 
  @pytest.mark.parametrize(