pyobjc_carbon_events_api_mouse_event_handler.py

1import Carbon.CarbonEvents
2import Carbon.Events
3from PyObjCTools import AppHelper
4
5def myHandler(next_handler, event, userdata):
6    # This is a simple event handler callback
7    print("Carbon Event Received!")
8    return Carbon.Events.noErr
9
10def main():
11    # Define the event type we are interested in (e.g., a simple mouse event)
12    # kEventClassMouse = b'mous'
13    # kEventMouseDown = 1
14    event_spec = Carbon.CarbonEvents.EventTypeSpec()
15    event_spec.eventClass = Carbon.CarbonEvents.kEventClassMouse
16    event_spec.eventKind = Carbon.CarbonEvents.kEventMouseDown
17
18    # Install the event handler on the target (e.g., the application dispatcher)
19    target = Carbon.CarbonEvents.GetEventDispatcherTarget()
20    
21    # Note: In real-world PyObjC Carbon usage, you typically use 
22    # Carbon.CarbonEvents.InstallEventHandler
23    status = Carbon.CarbonEvents.InstallEventHandler(
24        target, 
25        myHandler, 
26        1, 
27        [event_spec], 
28        None, 
29        None
30    )
31
32    if status == 0:
33        print("Successfully installed Carbon event handler. Press Ctrl+C to exit.")
34        try:
35            # Start the event loop
36            AppHelper.runConsoleEventLoop()
37        except KeyboardInterrupt:
38            pass
39    else:
40        print(f"Failed to install handler: {status}")
41
42if __name__ == "__main__":
43    main()