Re: Finding widget from its name?
[EMAIL PROTECTED] napisa?(a): > Is there a function that allows one to search for a widget using its name or > label? I'm using Glade 2 to design a window (just a basic input form), and > each widget has a unique name. Unfortunately Glade doean't save any global > pointers to the widgets; I can only assume that there must be another way to > find the objects from within the callback functions. Absolutely, there is - glade_xml_get_widget e.g. http://lists.ximian.com/pipermail/glade-users/2004-February/001790.html Regards, Waldek ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Use of fgets, puts, rewind in Gtk+
Sucheta Ghosh napisał(a):
> I wished to read a file and get some lines from there like this:
> -
> fp=fopen("filename", "r");
> for(k=0; k<8; k++){
> n=a[k];
> for (i=1; i<=n; i++) //Here 'n' is the line number
> fgets(s, 100, fp);
> puts(s);
> rewind(fp);
> }
> -
> -
> This is the code snippet, which is working so well after compiling with
> 'gcc' compiler, but when I added this code inside Gtk+ callback.c, a
> runtime error is occuring before execution of 'fgets'. I have already
> included 'stdio.h', but even then it is not executing.
>
> Do you have any idea that how to overcome this problem?
I can see some problems here, but that's not really GTK-related;
well - there's also a change that included snippet was simply
too short
1) no error checking for fopen(), fgets() - You don't to anything
if they fail (and that's most probable)
2) can't see any fclose() - multiple "fopen()"s without closing
the file is BAD :)
3) You're reading the same file 8 times - and that's *at least*
non-optimal - of course that depends on what exactly you're going
to achieve, however I'm quite convinced
4) I'd be really careful about placing some external file operations
nside of a callback function. but this depends on your overall
application purpose and design.
Best regards
Waldek
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Re: Programming with GTK
Steffen Gutmann napisa?(a):
> Consider the following macros:
>
> #define WindowObject gtk_widget_new(GTK_TYPE_WINDOW
> #define VBoxObject gtk_widget_new(GTK_TYPE_VBOX
[...]
> #define End NULL)
>
> ... allows to write code like this:
>
> GtkWidget *win, *label, *ok, *cancel;
>
> win = WindowObject,
> "child", VBoxObject,
> "child", label = LabelObject,
> "label", _("Hello world!"),
> "wrap", FALSE.
> End,
Well, I don't want to let You down, but to me it looks
totally unreadable because of introducing a non-C-like
syntax. If I want to be readable - I'd rather follow the C-like syntax,
because it's very schematic and despite of its disadventages,
it's quite easy to browse for a developer with some basic GTK experience.
And if I want to be compact - that's what libglade is for.
Of course, it's just MY OWN opinion and it's likely that
someone would disagree with me :-)
Best regards,
Waldek
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Re: Problem running the GTK main loop in a separate thread (different from the main one).
O czasie 2009-08-28 13:16, taki ktos jak Cristi Cobzarenco napisac raczyl: Hi, I've been using GTK for a pretty long time but I've never used threads with it and I'm not able to properly run the GTK main loop in a separate thread.More to the point if I create a window, for example, in a thread other than the GTK one, it becomes unresponsive. Other GTK calls (that don't create widgets) seem to work fine, however. I've attached a sample program to show what I mean, the flag "create_in_gt" sets whether to create the widgets in the GTK thread or in the main one. Is this normal behaviour, am I not supposed to do this, or is it a bug? Thou shalt not touch GUI from more than 1 thread. Have a look at http://blogs.operationaldynamics.com/andrew/software/gnome-desktop/gtk-thread-awareness.html http://library.gnome.org/devel/gtk-faq/stable/x481.html Hope that helps. Waldek -- Szukasz pracy? Sprawd¼ nasze oferty! http://link.interia.pl/f22b8 ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
