[maemo-developers] Gtk Dialog box causing application to crash

[From: Jussi Kukkonen]

Arvind1 K wrote:
> 
> Hi All,
> 
> I'm facing a strange problem while using GTK+ Dialog box
> I've used two dialogs one in IF and other in ELSE
> 
> if (some condition)
> {
>  GtkWidget *dialog1 = gtk_message_dialog_new (main_window,
>                                  GTK_DIALOG_DESTROY_WITH_PARENT,
>                                  GTK_MESSAGE_QUESTION,
>                                  GTK_BUTTONS_YES_NO,
>                                  "Send file to server %s?",
>                                  filename);
> result = gtk_dialog_run (GTK_DIALOG (dialog1));
> gtk_widget_destroy (dialog1);
> }
> 
> else
> {
> GtkWidget *dialog2 = gtk_message_dialog_new (main_window,
>                                  GTK_DIALOG_DESTROY_WITH_PARENT,
>                                  GTK_MESSAGE_QUESTION,
>                                  GTK_BUTTONS_YES_NO,
>                                  "Download file %s?",
>                                  filename);
> result = gtk_dialog_run (GTK_DIALOG (dialog2));
> gtk_widget_destroy (dialog2);
> }
> 
> 
> However if I use just a single dialog box at a time, everything works fine.
> I've used gdk_threads_enter() and gdk_threads_leave() whereever
> possible. these dialog boxes are created on 'select' event of CList so i
> cannot use gdk_threads_enter() and gdk_threads_leave().
> 
> I need to have few more dialog boxes, but using only 2 is causing
> problems of application crash.
> Can anybody address this issue?

I didn't really get what the actual problem here is, but some advice
that might help:

* Unless you really, really know that you need to use threads, you
  probably don't... using threads to get basic UI working is almost
  certainly a bad idea.

* gtk_dialog_run() makes the dialog modal, so you can't use several
  dialogs at once. You'll have to connect to the "respose" signal and
  and show the widget yourself.


HTH,
  Jussi

-- 
Jussi Kukkonen <jku at o-hand.com>
OpenedHand Ltd <http://o-hand.com>