How can I limit a GtkProgressBar’s width?


I have the following GTK 3 layout (here in Python for brevity):

from gi.repository import Gtk, Pango
win = Gtk.Window()
win.connect("destroy", Gtk.main_quit)
win.set_default_size(500, 25)
win.add(box := Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL))
box.pack_start(label := Gtk.Label(), expand=True, fill=True, padding=6)
label.set_text("Some text")
box.pack_end(bar := Gtk.ProgressBar(), expand=False, fill=False, padding=6)
bar.set_size_request(150, -1)
bar.set_text("This text sometimes can and will get long")

I want the progress bar to stay at some fixed width (e.g. at its width request of 150px) and ellipsize any overflowing text. But instead, it grows to fit the text:


How can I achieve what I want?

So far my best idea is to compute the text’s size with Pango and ellipsize it on my own (before set_text) to fit into the width request. Seems like there should be a better way.

The text support in a progress bar is really meant to show things like “33%” or “21/99”, not long text.

For that, you are probably better off with a separate label.

Better off how? Will it be easier to accomplish?

If you use a separate GtkLabel for the text, you can just use the builtin ellipsization (or wrapping) support.

But GtkProgressBar has built-in ellipsization, too, and it works just fine if I clamp the bar to some width. The problem is how to do this clamping, and it’s the same problem with GtkLabel, as far as I see.

Actually, I’ve come up with one way to clamp: pack the ProgressBar into one of 4 homogeneous columns of a GtkGrid. Then it is fixed to 1/4 of the grid’s (window’s) width, and I can pack the rest to span the other 3 columns. I had tried this before and it had some nasty side effects, but just tried again and it seems to work, so I’ll stick with this for now.

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