Is it legal to emit a signal in a slot?
I am trying to emit a signal in a slot, and want to trigger another slot. The intended slot does not seems called. Wondering if it's legal to do that?
Thanks,
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Is it legal to emit a signal in a slot?
I am trying to emit a signal in a slot, and want to trigger another slot. The intended slot does not seems called. Wondering if it's legal to do that?
Thanks,
I have no trouble with it. You may want to be more clear by posting the nw code.
I have no problem either. This is legal.
Well, the connect() returned false. signal/slot signatures match.
rc=connect(p, SIGNAL(status(bool)),
this, SLOT(handStatus(bool)));
If it works for you, you can connect the signal with the other signal.
1. What is p?
2. Does p have SIGNAL called status?
3. Use CODE rather than QUOTE around your code.
Quote:
Originally Posted by ask8y@yahoo.com
Well, well, well,Quote:
Originally Posted by ask8y@yahoo.com
It was the typo, handleStatus instead of handStatus. Nice if it failed at compilation time! It works now.
It can't fail at compilation time because introspection in Qt is done in run-time and not compile-time. Otherwise many of the features Qt offers couldn't be used.
qt spits out warnings about connections containing non-existant slots/signals to the console when the program is executed, so if you're using QtCreator, look at the application output panel, otherwise execute it from a console.
iirc you need to add CONFIG+=console if you're working on windows for that to work.
cheers,
thomas
I'm just going to state the obvious here:Quote:
Originally Posted by ask8y@yahoo.com
Keep an eye on infinite loops. Don't emit a signal that eventually calls the slot again. This way you end in an infinite loop.