Re: [gtkmm] bug with appending pages in a notebook

[cedric <cedric probesys com>]

hello!
i ve tried your advice and... it worked!!!
i would never have thought my problem come from that!
thanks (ou merci!)   ;-)
cedric


Christophe Pijcke a écrit :

> Hi,
>
> It is not to you to allocate memory for sprintf function ?
> have you try to do
> char label[200]; // or anything else ... // personaly, I prefer
> ostringstream
> sprintf(label, "cust %i ...);
> ...
> If you write to label (unalocated memory/somewhere memory), the stack is
> perhaps corrupted and exiting your function give you an error.
>
> But Your problem is perhaps another.
>
> I Hope this can help you,
>  Christophe.
>
>
> -----Message d'origine-----
> De : gtkmm-list-bounces gnome org
> [mailto:gtkmm-list-bounces gnome org]De la part de cedric
> Envoyé : mardi 25 mai 2004 12:11
> À : gtkmm-list gnome org
> Objet : [gtkmm] bug with appending pages in a notebook
>
>
>
> Hello!
> it has been a while since i ask for help, here i m back ;-)
> i ve tried to solve it alone but it didn t success in it :'(
>
> i think it s a really weird bug, but here it is:
>
> i ve made an interface with a menubar, a toolbar and a functionnalities'
> tree (=functree). in this 3 elements of my interface, we can select an
> action, for example "add a customer": no matter if we call it from the
> toolbar, from the menubar or from the functree, it always calls the same
> method of my "test" plugin (so it calls test::add_customer() ). nothing
> uncommon here i think...
>
> the add_customer method adds a page in a notebook, and sets this page as
> the current active page (of course we can select another page after
> normally). but i have a WEIRD seg fault that i ll explain just after
> showing the code:
>
>
> -------------------------------------------------------------------------
> void test::add_customer()
> {
>    CustomersFormat *c = new CustomersFormat();
>    char *label ;
>    sprintf(label, "cust %i", CustomersFormat::nb_cust_form);
>    Formularies::mainViewNotebook_ptr->append_page(*c, label);
>
>    int pn = Formularies::mainViewNotebook_ptr->page_num(*c);   // weird
> here ///
>    //std::cout << pn << std::endl;//pn is correctly set!!!
>    Formularies::mainViewNotebook_ptr->set_current_page(pn);
>
>    std::cout << "end add customer" << std::endl;
> }
> -------------------------------------------------------------------------
>
> CustomersFormat is a class implementing a formulary that will be
> displayed in the notebook.
> mainViewNotebook_ptr is a global ptr on the notebook of my interface.
>
> in the api i ve seen that page_num takes a "const Widget&" parameter,
> but it doesn t change anything to my problem...
> anyway, pn is correctly set, so...
>
> here is the weird thing:
> if we call this "add_customer" method from the menubar or from the
> toolbar, it works.
> but if we call it from the functree, it provoques a seg fault AFTER
> having displayed the last std::cout "end add customer". this seg fault
> seems to be due to the "page_num" method!
> so if i remove the "page_num" line and replace pn by 0 (zero) in the
> "set_current_page", it works if we call "add_customer" from the functree
> BUT it provoques a seg fault if we call it from the menubar or from the
> toolbar!!! and it displays normally "end add customer"...
> i don t understand because NOTHING is done AFTER the last std::cout, and
> especially because it should work either for none or for all! i don t
> understand this difference between the menubar-toolbar // functree...
> i m sure the links from menubar/toolbar/functree to the add_customer
> method are ok since there are others method linked and they work fine!
> and add_customer is called and executed entirely since it displays the
> final std::cout!
>
> thanks to the genius that will help me! :-)
> regards,
> cedric
>
>
>
>
>
>
>
>
>
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