Struct Positioning 

pub struct Positioning {
    pub left: Option<f32>,
    pub top: Option<f32>,
    pub right: Option<f32>,
    pub bottom: Option<f32>,
    pub width: Option<f32>,
    pub height: Option<f32>,
    pub start: Option<f32>,
    pub end: Option<f32>,
}

What a Positioned pins, in logical pixels from the stack’s edges. None on an edge means “not pinned there”.

Fields

left: Option<f32>

The distance from the stack’s left edge, or None to leave that edge free.

top: Option<f32>

The distance from the stack’s top edge, or None to leave that edge free.

right: Option<f32>

The distance from the stack’s right edge, or None to leave that edge free.

bottom: Option<f32>

The distance from the stack’s bottom edge, or None to leave that edge free.

width: Option<f32>

A fixed width, or None to take the one the edges and the content leave.

height: Option<f32>

A fixed height, or None to take the one the edges and the content leave.

start: Option<f32>

The distance from the stack’s start edge — the left in a left-to-right script, the right in a right-to-left one — or None (milestone 589).

end: Option<f32>

The distance from the stack’s end edge, or None.

Implementations

impl Positioning

pub fn for_direction(self, rtl: bool) -> Self

The same pins with start and end made physical for the reading direction: the start is the left in a left-to-right script and the right in a right-to-left one. An edge given physically as well keeps its own value.

pub fn resolved_width(&self, available: f32) -> Option<f32>

The width this asks for in a stack available wide, and None when it asks for the child’s own.

pub fn resolved_height(&self, available: f32) -> Option<f32>

The height this asks for in a stack available tall, and None when it asks for the child’s own.

pub fn place( near: Option<f32>, far: Option<f32>, available: f32, own: f32, fraction: f32, ) -> f32

Where the box goes on one axis, given the stack’s extent, the child’s own and the share of the free space the stack’s alignment asks for.

The near edge wins if it is pinned; failing that the far edge places the box by its own size; failing both, the stack aligns it.

Trait Implementations

impl Clone for Positioning

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 Positioning

impl Debug for Positioning

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

Formats the value using the given formatter.

impl Default for Positioning

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Positioning

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Positioning