| class TCallBack |
Encapsulates a general call-back function.
The class encapsulates:
1. a pointer to a function which takes an argument of type TAny* and returns a TInt.
2. a pointer which is passed to the function every time it is called. The pointer can point to any object. It can also be NULL.
The callback function can be a static function of a class, e.g. TInt X::Foo(TAny *) or it can be a function which is not a member of any class, e.g. TInt Foo(TAny *).
When used with the CIdle and the CPeriodic classes, the callback function is intended to be called repeatedly; the encapsulated pointer is passed on each call. Typically, the pointer refers to an object which records the state of the task across each call. When used with CIdle, the callback function should also return a true (non-zero) value if it is intended to be called again, otherwise it should return a false (zero) value.
| Public Member Functions | |
|---|---|
| TCallBack() | |
| TCallBack(TInt(*)(TAny *aPtr)) | |
| TCallBack(TInt(*)(TAny *aPtr), TAny *) | |
| TInt | CallBack() |
| Public Attributes | |
|---|---|
| TInt(* | iFunction |
| TAny * | iPtr |
| TCallBack | ( | TInt(*)(TAny *aPtr) | aFunction | ) | [inline] |
Constructs the callback object with the specified callback function.
| TCallBack | ( | TInt(*)(TAny *aPtr) | aFunction, |
| TAny * | aPtr | ||
| ) | [inline] | ||
Constructs the callback object with the specified callback function and a pointer to any object.
| TAny * | iPtr |
A pointer that is passed to the callback function when the function is called.
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