Resizing window changes some widgets size whereas it shouldn't

[GuillaumeGomez]

A small video of the bug:

Peek.2021-10-06.22-15.mp4

The code I used:

egui::Window::new("Character").collapsible(false).show(&egui_ctx, |ui| {
    let player = &players[0];

    ui.label("Character imperio");
    ui.separator();

    egui::Grid::new("chracter_infos").show(ui, |ui| {
        ui.label("Level");
        ui.label(&player.level.to_string());
        ui.end_row();

        ui.label("Experience");
        ui.label(&format!("{} / {}", player.xp, player.xp_to_next_level));
        ui.end_row();

        ui.label("Health");
        ui.label(&player.health.to_string());
        ui.end_row();

        ui.label("Stamina");
        ui.label(&player.stamina.to_string());
        ui.end_row();

        ui.label("Mana");
        ui.label(&player.mana.to_string());
        ui.end_row();
    });
});

Thanks a lot for this crate, it's really great!

[Bromeon]

Also happens in the Table Test demo in latest master (commit e4aa1e6).
What's interesting is that it resizes one, but not all separators:

Resizing.mp4

A similar, but maybe not the same issue: #762

[emilk]

This is a consequence of immediate mode. You make the window narrower, so all contained widgets try to fit within this smaller size. The first few widgets can fit, but the later can't, so the window expands to fit the wider widgets.

I see no obvious way of fixing this except for multipass layout.

[emilk]

Closed in favor of

• Investigate a multipass (two-pass) version of egui #843