GTK+ Forums

TriKri · Familiar Face Joined: 19 Mar 2008 Posts: 14

Hi!

I have bumped into two different function which seems to do the same thing. I use them both in my program but I now want to use only one of them. So I wonder, what is the difference between g_signal_connect and gtk_signal_connect? I also noticed that the function that was given as a parameter to be called when the event occured, was given differently to the functions as well. In the case with g_signal_connect, the funktion was given as G_CALLBACK(function), while in the other case it was given as GtkSiglanFunc(function). Which one is right to use and which function should I use? Which one is best?

Wolfgang · Familiar Face Joined: 05 Feb 2008 Posts: 37

GTK+ Reference: The GTK+ signal system merely proxies the GLib signal system now. For future usage, direct use of the GSignal API is recommended, this avoids significant performance hits where GtkArg structures have to be converted into GValues.
So, g_signal_connect() is the best choice.

TriKri · Familiar Face Joined: 19 Mar 2008 Posts: 14

Okay, thanks! I have realized that G_CALLBACK must be some kind of a macro, does it maybe transform it to a GtkSignalFunc?

Micah Carrick · Posted: Tue Mar 25, 2008 2:51 pm Post subject:

G_CALLBACK is a casting macro. It will cast to a (*GCallback)...

However, I believe that the GCallback is similar to or the same as GtkSignalFunc and simply the "new" way of doing is since gtk_signal_connect and friends and deprecated and no longer used.

In short, stick to using g_signal_connect and G_CALLBACK.

TriKri · Familiar Face Joined: 19 Mar 2008 Posts: 14

Thanks.