Re: How to send user_data into callback function by glade only?

[donglongchao <donglongchao 163 com>]

2009-04-16，"Tristan Van Berkom" <tvb gnome org> ：
>On Tue, Apr 14, 2009 at 10:46 AM, donglongchao <donglongchao 163 com> wrote:
>[...]
>> And I want to show the value of "myspinbutton" by pass its point to callback function.But every time I click the button there is no response.Just left "(gtk_toggle_button_get_active): assertion `GTK_IS_TOGGLE_BUTTON
>> (toggle_button)' failed".
>>
>> But if i do not pass the "&spinbutton", and the function only have one para(GtkButton *checkbutton1), it works,no error,no warning.
>>
>> I do not know why.Any one could help?Thanks.
>
>With libglade, if you specify an object... it is like reffering to prehistoric
>gtk_signal_connect_object(), which swaps your instance/user-data arguments
>free-of-charge, allowing for direct hooking up of function calls from
>within Glade.
>
>i.e. connect to button1 "clicked", specify "window1" as the object, and then
>just put "gtk_widget_hide" as the callback... you just wrote a button that
>closes the window without any code...
>
>Yeah its a little awkard an unclear... just forget about it ;-)
>
>Cheers,
>             -Tristan

Hi.

Maybe you did not understand me.
I mean when I use the callback function with two para(GtkButton *checkbutton1,gpointer user_data),
there is no response when I click the button, no messagesialog is created .Because There is an assertion error when run function "gtk_toggle_button_get_active".So the programme can not run into the codes after this function.
The error is like this "(gtk_toggle_button_get_active): assertion `GTK_IS_TOGGLE_BUTTON
 (toggle_button)' failed".

But if I use the function with only one para(GtkButton *checkbutton1),and I do not send "&spinbutton1" as a user_data,
the program runs very good ,and the messagediaog "window" is created and showed correctly.No such assertion error.
I do not know why. When sending user_data,must we by our hands only?Using g_signal_connect(......) or something like that?
Can not use glade to achieve our goal?
Anyone help me?Thanks a lot.

Wish you happy.
Dong