Regular callback structure
typedef struct Pt_callback { int (*event_f)( PtWidget_t *, void *, PtCallbackInfo_t * ); void *data; } PtCallback_t;
The PtCallback_t structure lets you specify a widget's callbacks when you call PtCreateWidget() or PtAddCallbacks().
This structure contains at least:
A callback function takes the following arguments:
A PhAB callback takes as its second argument a pointer to an ApInfo_t structure. For more information, see the Photon Library Reference. |
Callback functions should return Pt_CONTINUE unless the description of the widget's callback resource tells you to return something else.
Photon
PtBalloonCallback_t, PtCallbackInfo_t, PtHotkeyCallback_t, PtRawCallback_t
ApInfo_t, PtAddCallbacks(), PtCreateWidget() in the Photon Library Reference
“Callbacks” in the Managing Widgets in Application Code chapter of the Photon Programmer's Guide.