Hi Zhengzhe, Zhenghe Zhang wrote: > As the codes show below, I add a button to my dialog, and write a > callback function response of clicking button. > > When I run my application, I find my applications do this: > > 1. call the callback function, > > 2. after step 1, execute the default handler of signal Yes, gsignals chain up, so you can attach many callbacks to one button. Usually this does no harm. Digging in the documentation at http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html, I found this: g_signal_override_class_closure () void g_signal_chain_from_overridden (const GValue *instance_and_params, GValue *return_value); Calls the original class closure of a signal. This function should only be called from an overridden class closure; see g_signal_override_class_closure(). instance_and_params : the argument list of the signal emission. The first element in the array is a GValue for the instance the signal is being emitted on. The rest are any arguments to be passed to the signal. return_value : Location for the return value. I don't know if that's what you're looking for, honestly I don't see what the problem is with the default handler being called. Cheers, Dave. -- maemo.org docsmaster Email: dneary@xxxxxxxxx Jabber: bolsh@xxxxxxxxxx _______________________________________________ maemo-users mailing list maemo-users@xxxxxxxxx https://lists.maemo.org/mailman/listinfo/maemo-users
