Re: gtk_entry question (example from faq)

["Brian J. Tarricone" <bjt23 cornell edu>]

On Sun, 07 Dec 2008 04:06:55 +0300 Vasiliy G Tolstov wrote:

> I'm try to use exmaple from faq
> http://library.gnome.org/devel/gtk-faq/stable/x842.html
>
> But then i'm try to compile - i see this error... 
> How can i add to entry ability to insert only digits?
>
>
> window.cpp:214: error: invalid conversion from âvoid (*)()â to âvoid*â
> window.cpp:214: error:   initializing argument 6 of âguint
> g_signal_handlers_block_matched(void*, GSignalMatchType, guint,
> GQuark, GClosure*, void*, void*)â
> window.cpp:218: error: invalid conversion from âvoid (*)()â to âvoid*â
> window.cpp:218: error:   initializing argument 6 of âguint
> g_signal_handlers_unblock_matched(void*, GSignalMatchType, guint,
> GQuark, GClosure*, void*, void*)â

Well, you're compiling it as a C++ program, not a C program.  C++ is
more strict about type-checking in parameters passed to functions.
Unless there's a reason you're using C++, rename the file to .c and
compile with a C compiler.

Otherwise, you'll have to add extra casts for the function pointers
passed to the functions noted in the error message.

(In all fairness, though, g_signal_handlers_unblock_matched() should
take a GCallback as the 6th param, not a gpointer.  C just doesn't
care, while C++ does.)

        -brian