Are any GUI libs going to make use of signals/slots?
lutger.blijdestijn at gmail.com
Sat Dec 9 19:09:53 PST 2006
> Craig Black wrote:
> > Is anybody using or planning to use the new signal/slot feature? Seems like
> > a powerful feature to me. I'm curious as to its percieved utility to GUI
> > library maintainers.
> > -Craig
> I made a simple OpenGL based GUI for my little library that uses
> signal/slots (note I just recently completed it but haven't used it for
> any apps yet, except for test apps).
> It makes it really easy for users to hook up their own custom code to
> handle things such as buttons being clicked.
> One thing I'm curious about is the efficiency of signals and slots. I'm
> guessing it has slightly more overhead than a normal function call,
> therefore it is not something to be calling constantly.
> ~ Clay
Only way to be sure is to profile, but performance cost should be very small. It is implemented like this, slot is the delegate:
foreach (slot; slots[0 .. slots_idx])
I think usage of signals will only matter if your code would benefit a lot from being inlined, but better not to do assumptions.
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