using function pointers and callback functions

[ehnuh]

Hi could anyone give me a simple reference to function pointers and callback functions in qt?

are signal slots and callback functions different from each other?

thanks!

[pkj]

Signal slots are different from function pointers in the way it has been implemented. Although the purpose of both of 'em is the same.
Signal slots are easier to understand and implement. If you are largely using qt classes, it proves very helpful. However, it is slower than the function pointers as there are a few extra function calls.
The speed however is immaterial in most of the cases because the percentage gain of using function pointers in most cases is not significant.

[Santosh Reddy]

are signal slots and callback functions different from each other?
Signals and Slots are built on top of callback concept, with added features like type safety, signal-to-signal, multi-slots, and cross-thread etc. At the core both Signals and Slots are plain C++ funcation calls (member functions)