Struct ScrollbarGeometry

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pub struct ScrollbarGeometry {
    pub orientation: ScrollbarOrientation,
    pub track_rect: LogicalRect,
    pub button_size: f32,
    pub usable_track_length: f32,
    pub thumb_length: f32,
    pub thumb_size_ratio: f32,
    pub scroll_ratio: f32,
    pub thumb_offset: f32,
    pub max_scroll: f32,
    pub width_px: f32,
}

Expand description

Single source of truth for scrollbar geometry.

Computed once by compute_scrollbar_geometry, then used by:

Display list painting (paint_scrollbars)
GPU transform updates (update_scrollbar_transforms)
Hit-testing (hit_test_component)
Drag delta conversion (handle_scrollbar_drag)

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§orientation: ScrollbarOrientation

Orientation (vertical or horizontal)

§track_rect: LogicalRect

The full track rect in the container’s coordinate space

§button_size: f32

Button size (square: width = height = scrollbar_width_px)

§usable_track_length: f32

Usable track length after subtracting buttons and corner = track_total - 2*button_size

§thumb_length: f32

The thumb length (min-clamped to 2*width_px)

§thumb_size_ratio: f32

Thumb size as ratio of viewport / content (0.0–1.0)

§scroll_ratio: f32

Scroll ratio (0.0 at top/left, 1.0 at bottom/right)

§thumb_offset: f32

Thumb offset in pixels from the start of the usable track region

§max_scroll: f32

Max scroll distance in content pixels

§width_px: f32

CSS-specified scrollbar thickness (width for vertical, height for horizontal)

Trait Implementations§

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impl Clone for ScrollbarGeometry

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fn clone(&self) -> ScrollbarGeometry

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for ScrollbarGeometry

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl Default for ScrollbarGeometry

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl Copy for ScrollbarGeometry

Auto Trait Implementations§

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impl UnwindSafe for ScrollbarGeometry

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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