Enum LayoutModality 

pub enum LayoutModality {
    Pointer,
    Touch,
    AccessibilityZoom,
}

The current input modality that the layout engine adapts to.

P1-67: Modern platforms adjust touch target sizes and item spacing for touch vs pointer input. Setting LayoutModality::Touch causes layout containers to enforce a minimum touch target of 44×44 pt (Apple HIG) for any view whose intrinsic size is smaller.

Variants

Pointer

Precise pointer (mouse, trackpad, stylus). Use intrinsic sizes.

Touch

Touch input. Enforce a minimum tap-target size of 44×44 logical pts.

AccessibilityZoom

Accessibility zoom is active. Touch rules apply and spacing is doubled.

Implementations

impl LayoutModality

pub fn min_tap_target(self) -> f32

Minimum tap-target dimension for this modality (logical pixels).

pub fn spacing_multiplier(self) -> f32

Spacing multiplier applied on top of the view’s configured spacing.

pub fn adapt_size(self, size: Size) -> Size

Apply this modality’s minimum tap-target constraint to a measured size.

Contract: only enlarges the size; never shrinks it.

Trait Implementations

impl Clone for LayoutModality

fn clone(&self) -> LayoutModality

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LayoutModality

impl Debug for LayoutModality

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

Formats the value using the given formatter.

impl Default for LayoutModality

fn default() -> LayoutModality

Returns the “default value” for a type.

impl Eq for LayoutModality

impl PartialEq for LayoutModality

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LayoutModality