Re: [gtk-list] Re: Q: automatic function on program startup

[Eduardo Perez <eduperez redestb es>]

csmall@scooter.o.i.net wrote:
> 
> Eduardo Perez wrote:
> > I need to write a program which shows a window when starting and then
> > enters a function (that displays some info in that window), without any
> > user interaction. Could anybody tell me if is this possible and how,
> > please?
> ok you need to be a bit more specific. I assume you know how to make a window,
> you could then use, say, a label in the window:
> 
> GtkWidget *mylabel;
> 
> void myfunc(void)
> {
>   gtk_label_set(GTK_LABEL(mylabel), "Goodbye");
> }
> 
> void setup_window() {
>   GtkWidget *dialog;
> 
>   dialog = gtk_dialog_new();
> 
>   mylabel = gtk_label_new("hello");
>   gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), mylabel);
>   gtk_widget_show(mylabel);
>   gtk_widget_show(dialog);
> 
>   myfunc();
> }
> 
> Now this assumes you want to build your window (I'm using a dialog here)
> and then immediately run the function to put some text in. But of course
> you could wait for:
> 
>   * A button to be pressed, using gtk_signal_connect to call myfunc();
>   * Some time to elapse, using gtk_timeout_add();
>   * Some input to occur, or a connection to be made, using gdk_input_add();
>   * Plus plenty of other triggers out there.
> 
> I must admit, to move from a procedural language to a event-driven one is a
> bit tricky to do, I still get caught, especially with file and socket handling
> stuff.
> 
> Hope this helps,
> 
>   - Craig
> 
> --
> To unsubscribe: mail -s unsubscribe gtk-list-request@redhat.com < /dev/null

My problem is that I need this to be done at the very beginning of a
program (not when creating a second window, but the frist one) and the
text shown in the label should change (and be seen) several times.

Once I call gtk_main, only user interaction can trigger a funcion (I
tried using an idle function too, but display isn't redrawn until it
finished), and nothing is displayed before the call to gtk_main.

Thank you very much for your interest, I hope this helps you to help me.