Enum VirtualListScroll 

#[non_exhaustive]
pub enum VirtualListScroll {
    Reveal,
    Top,
    Center,
}

Where VirtualListHandle::scroll_to_item places the row.

Adding Center in 0.13 made this enum #[non_exhaustive]; a match on it needs a wildcard arm.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Reveal

Scroll the least distance that makes the row fully visible; a row already fully visible does not move. In a measured list the distance needs the heights of the rows in between, so a row that was not laid out in the last frame (far outside the viewport, never measured) is brought to the top edge instead, as Top does.

Top

Put the row’s top edge at the top of the viewport (clamped, in a uniform list, so the last page stays full).

Center

When the row is not fully visible, scroll so its centre sits at the viewport’s centre, clamped at both ends of the content; a row already fully visible does not move. This is GPUI’s ScrollStrategy::Center, which the keyboard cursor of the fixed-row collections follows. A measured list centres a row it laid out in the last frame and brings any other row to the top edge, as Top does.

Trait Implementations

impl Clone for VirtualListScroll

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for VirtualListScroll

impl Debug for VirtualListScroll

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

Formats the value using the given formatter.

impl Default for VirtualListScroll

fn default() -> Self

Returns the “default value” for a type.

impl Eq for VirtualListScroll

impl PartialEq for VirtualListScroll

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for VirtualListScroll