Returns true if the system knows the specified device. This means that it sets all button and axis indices exactly as defined in joysticklist. Unknown joypads are not expected to match these constants, but you can still retrieve events from them.
See Implementation
Returns true if the system knows the specified device. This means that it sets all button and axis indices exactly as defined in joysticklist. Unknown joypads are not expected to match these constants, but you can still retrieve events from them.