Struct Measured 

pub struct Measured {
    pub width: Option<i32>,
    pub height: Option<i32>,
}

What a widget would like to be, on the axes it has an opinion about.

Per axis, and both optional, because that is what the widgets actually are. A List has an opinion about both. An Alert has one about its height and none about its width — it is a banner, and a banner is as wide as you make it. A Panel has none about either, because it is the background other things sit on and has no content of its own.

A single Option<Size> would force a widget with an opinion about one axis to invent one about the other, and an invented size is worse than no size: no size, the caller notices and decides.

assert_eq!(Measured::NOTHING, Measured::default());
assert_eq!(Measured::wide(120).width, Some(120));
assert_eq!(Measured::wide(120).height, None);

Fields

width: Option<i32>

The width it would like, if it has a view.

height: Option<i32>

The height it would like, if it has a view.

Implementations

impl Measured

pub const NOTHING: Self

No opinion on either axis. The default, and what most widgets answer.

pub const fn wide(width: i32) -> Self

An opinion about the width only.

pub const fn tall(height: i32) -> Self

An opinion about the height only.

pub const fn both(width: i32, height: i32) -> Self

An opinion about both.

Trait Implementations

impl Clone for Measured

fn clone(&self) -> Measured

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Measured

impl Debug for Measured

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

Formats the value using the given formatter.

impl Default for Measured

fn default() -> Measured

Returns the “default value” for a type.

impl Eq for Measured

impl PartialEq for Measured

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Measured