Mikael Grahn <[EMAIL PROTECTED]> writes:
> void hello(GtkWidget *widget, GdkEvent *event, gpointer data)
>
> isn't right for a callback...
>
> void hello(GtkWidget *widget, gpointer data)
>
> It should look like this.I only use the upper one when handling
> delete_event. I'm quite new with gtk also, so i can't really explain why.
The reason is that the signature of a callback always depends on the
specific signal being emitted, so you always have to check the docs or
header files to see which signature you need.
A very common signature is:
void hello(GtkWidget *widget, gpointer data)
And all the "event" signals use:
gint event_cb(GtkWidget* widget, GdkEvent* event, gpointer data)
where the return value controls propagation of the event to parent
containers.
Read my book on this, http://developer.gnome.org/doc/GGAD/ it has full
details.
Havoc
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