[AD] Hotplug joysticks

["Trent Gamblin" <trent@xxxxxxxxxx>]

I've got joystick hotplugging working on Windows right now.

This is one feature that maybe should be added to 4.9 now

because it changes the semantics of how things work a bit.

This is how it works:

 

The user installs joystick driver and calls al_get_num_joysticks and al_get_joystick(x).

Everything behaves as normal until:

The (new) system event source (al_get_system_event_source) emits a ALLEGRO_EVENT_JOYSTICK_CONFIGURED event.

At this point, the user can ignore the event and proceed as

normal, but if they call al_get_num_joysticks, the present "user" configuration of sticks changed to the present "system" view of joysticks (what is actually plugged in and not on the system at that time.)
User calls al_get_joystick(x) again for all desired joysticks.

 

Joysticks that are registered as event sources are automatically removed from the queue if they're unplugged, but not until the user calls al_get_num_joysticks. This is the key function and the only change to the current api.

 

It's up to the user to register new joysticks with their queues.

 

So what do you think? I think this is a 4.9 feature but it may be best for 5.1... the reason I think it's for 4.9 is 5.1 will the slightly change API usage.

 

Trent