Right way to make same-width buttons in a column?

[pozix604]

I want the following buttons to all have the same width, being the width of the button that fits the widest content:

ui.button("Alpha");
ui.button("Beta");
ui.button("Gamma");

Realizing that this is a two-pass effort, I ended up with the following:

ui.with_layout(Layout::top_down(Align::Min), |ui| {
  if let Some(size) = self.button_size {
    let r1 = ui.add_sized(size, Button::new("Alpha"));
    let r2 = ui.add_sized(size, Button::new("Beta"));
    let r3 = ui.add_sized(size, Button::new("Gamma"));
  } else {
    let r1 = ui.button("Alpha");
    let r2 = ui.button("Beta");
    let r3 = ui.button("Gamma");
    self.button_size = Some(
      r1.rect.size().max(r2.rect.size()).max(r3.rect.size())
      + Vec2::new(0.5, 0.5), // <------------
    );
  }
});

which is unfortunate due to the duplicated widget creation effort. But more annoyingly, the size gathered in the first pass doesn't actually work. It causes The largest button to wrap its text. It doesn't happen with all strings, which suggests a font sizing problem or that this isn't the way to do it.

I have to add in a buffer for it to not wrap.

Is this the right approach? Alternatives?