Skip to content

Fix: ScrollArea layout jitter with floating bars and zoom levels #7944

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
rustbasic wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Fix: ScrollArea layout jitter with floating bars and zoom levels #7944

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
dc2c520
Update scroll_area.rs
rustbasic Mar 1, 2026
a2f9893
Update scroll_area.rs
rustbasic Mar 1, 2026
3ae4aba
Update scroll_area.rs
rustbasic Mar 5, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 11 additions & 3 deletions crates/egui/src/containers/scroll_area.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -732,7 +732,12 @@ impl ScrollArea {
ctx.animate_bool_responsive(id.with("v"), show_bars[1]),
);

let current_bar_use = show_bars_factor.yx() * ui.spacing().scroll.allocated_width();
let scroll_style = ui.spacing().scroll;
let current_bar_use = if scroll_style.floating {
show_bars.to_vec2().yx() * scroll_style.allocated_width()
} else {
show_bars_factor.yx() * scroll_style.allocated_width()
};

let available_outer = ui.available_rect_before_wrap();

Expand Down Expand Up @@ -1158,9 +1163,12 @@ impl Prepared {

let outer_rect = Rect::from_min_size(inner_rect.min, inner_rect.size() + current_bar_use);

// Epsilon to prevent jitter from floating-point rounding.
let epsilon = 0.5;

let content_is_too_large = Vec2b::new(
direction_enabled[0] && inner_rect.width() < content_size.x,
direction_enabled[1] && inner_rect.height() < content_size.y,
direction_enabled[0] && (inner_rect.width() + epsilon < content_size.x),
direction_enabled[1] && (inner_rect.height() + epsilon < content_size.y),
);

let max_offset = content_size - inner_rect.size();
Expand Down
Loading