ansaurus

Question

Answer 1

+2 A:

Did you call

spinner.show ();

and add it to some window?

Moreover, your calculations may block the UI, so it is not updated. Call

while (Gtk::Main::events_pending ())
    Gtk::Main::iteration ();

once in a while.

el.pescado 2010-07-21 15:40:19

Thanks for your suggestion. Now I've done spinner.show(), I realise perhaps I'm barking up the wrong tree. The spinner is the thing the arrow cursor turns into while the program's doing something, no? What Motif people call a watch-cursor? If not, what is that other thing called?

Brian Hooper 2010-07-21 15:54:29

Nope, the spinner is a widget like the thing that appears in the tabs of many popular browsers while the page is loading, sometimes called a "throbber". See my answer for what you want.

ptomato 2010-07-21 17:02:43

@el.pescado, thank you for your help; I've no doubt your answer would have solved the question I asked, but sadly the question I asked wasn't what I needed to know. Thank you all the same.

Brian Hooper 2010-07-22 20:07:56

Answer 2

+1 A:

To change the mouse cursor to "busy" you can do the following:

Glib::RefPtr<Gdk::Window> window = dialog.get_window();
if(window) {
    window->set_cursor(Gdk::Cursor(Gdk::WATCH));
    Gdk::flush();
}

To change it back, do

window->set_cursor();

instead.

Disclaimer: I usually work with GTK in C, and have translated this on the fly...

ptomato 2010-07-21 17:19:17

Thanks for the tip, ptomato. I've looked through the documentation and what you suggest appears to be what was intended. Sadly, when I do it, it makes no difference. Is there anything that needs to be done elsewhere (I tracked the execution through the if-block with a diagnostics, and tried a selection of widgets including the main dialogue for the get_window method).

Brian Hooper 2010-07-22 07:06:19

Oops, sorry... forgot `Gdk::flush()`. See edited answer.

ptomato 2010-07-22 07:16:39

Thank you, ptomato, that's done the trick. It would have been a good long while before I found that particular fact.

Brian Hooper 2010-07-22 20:06:20

ansaurus

tags:

views:

answers:

Gtk Spinner Not Appearing

related questions