Synel SY-7000 SDK, Руководство пользователя

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SY-7000 SDK Manual Writing the SDK Application
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• EVENT_MAGCARD2,
• EVENT_MAGCARD3,
• EVENT_PROXCARD,
• EVENT_TIMER,
• EVENT_SOCKET
EventCallback callback
function to be called when the event occurs
void* userdata
pointer to structure passed when the event triggers callback
The callback function used must be in the following the form:
void _callback_keys (Event event
,
const char * data_p
,
const unsigned int size
,
void * userdata_p)
where the values passed are as follows:
event
registration event, as defined above
data_p
specific data for each callback as follows:
keyboard
value of key pressed
card (all cards)
card value
timer
timer_id, as returned by createLowResTimer (see below)
socket
socket data
userdata_p
value passed to RegisterForEvent
void UnRegisterForEvent(Event eventId, EventCallback callback);
Unregister the event:
Event eventId
event being unregistered from (card, keyboard, timer, etc.)
EventCallback callback
function to be called when event occurs