updating label text without running gtk_main_iteration()

I'm doing the following:

I read data from a file, and display it in a drawing area with
dgk_draw_whatever() in a tight loop.

I also update some labels with gtk_label_set_text().

Unfortunately I cannot get the labels to draw onto the screen without
doing something like:

    while (gtk_events_pending()) {

at various points in my loop.

I don't want to handle all events, so I'd like to find some command to
just force a redraw of those labels.

Any tips?

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