Struct FontWeight 

pub struct FontWeight {
    pub value: i32,
}

The thickness of the glyphs used to draw the text.

Values must be in the range 1..1000.

Fonts are typically weighted on a 9-point scale, which, for historical reasons, uses the names 100 to 900. In Flutter, these are named w100 to w900 and have the following conventional meanings:

• w100: Thin, the thinnest font weight.

• w200: Extra light.

• w300: Light.

• w400: Normal. The constant NORMAL is an alias for this value.

• w500: Medium.

• w600: Semi-bold.

• w700: Bold. The constant BOLD is an alias for this value.

• w800: Extra-bold.

• w900: Black, the thickest font weight.

For example, the font named “Roboto Medium” is typically exposed as a font with the name “Roboto” and the weight W500.

Some modern fonts allow the weight to be adjusted in arbitrary increments. When using these fonts, applications can specify FontWeight instances constructed using values other than the predefined values.

Fields

value: i32

The thickness value of this font weight.

Implementations

impl FontWeight

pub const W100: FontWeight

Thin, the least thick.

pub const W200: FontWeight

Extra-light.

pub const W300: FontWeight

Light.

pub const W400: FontWeight

Normal / regular / plain.

pub const W500: FontWeight

Medium.

pub const W600: FontWeight

Semi-bold.

pub const W700: FontWeight

Bold.

pub const W800: FontWeight

Extra-bold.

pub const W900: FontWeight

Black, the most thick.

pub const NORMAL: FontWeight = FontWeight::W400

The default font weight.

pub const BOLD: FontWeight = FontWeight::W700

A commonly used font weight that is heavier than normal.

pub const VALUES: [FontWeight; 9]

A list of all the named font weights.

pub fn new(value: i32) -> FontWeight

Creates a FontWeight object, which can be added to a text style to select the thickness of a font’s glyphs.

pub fn index(self) -> i32

The encoded integer value of this font weight.

Deprecated in Dart in favor of value.

pub fn lerp( a: Option<FontWeight>, b: Option<FontWeight>, t: f64, ) -> Option<FontWeight>

Linearly interpolates between two font weights.

If both a and b are null, then this method will return null. Otherwise, any null values for a or b are interpreted as equivalent to NORMAL (also known as W400).

The t argument represents position on the timeline, with 0.0 meaning that the interpolation has not started, returning a (or something equivalent to a), 1.0 meaning that the interpolation has finished, returning b (or something equivalent to b), and values in between meaning that the interpolation is at the relevant point on the timeline between a and b. The interpolation can be extrapolated beyond 0.0 and 1.0, so negative values and values greater than 1.0 are valid. The result is clamped to the range W100–W900.

Trait Implementations

impl Clone for FontWeight

fn clone(&self) -> FontWeight

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FontWeight

impl Debug for FontWeight

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

Formats the value using the given formatter.

impl Display for FontWeight

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

Formats the value using the given formatter.

impl Eq for FontWeight

impl Hash for FontWeight

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for FontWeight

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FontWeight