Struct WidgetFont 

pub struct WidgetFont(/* private fields */);

A font-handle slot for text widgets (FONT-00 §5).

Holds an optional process-lifetime font handle and resolves to the built-in FONT_6X10 default when none is assigned. Embedding a WidgetFont (rather than an inline &FONT_6X10) gives every widget a uniform set_font assignment point while centralizing the fallback in resolve.

The handle is &'static dyn FontMetrics: fonts are process-lifetime assets (static FONT_6X10, static-baked PackedFonts), so widgets need no lifetime parameter and the slot stays Copy.

Implementations

impl WidgetFont

pub const fn new() -> Self

A slot with no assigned font; resolve yields the FONT_6X10 default.

pub const fn with_font(font: &'static dyn FontMetrics) -> Self

A slot pre-assigned to font.

pub fn set(&mut self, font: &'static dyn FontMetrics)

Assign font, replacing any previous assignment.

pub fn clear(&mut self)

Clear the assignment, reverting resolve to the FONT_6X10 default.

pub fn is_set(&self) -> bool

Return true when a font has been explicitly assigned.

pub fn resolve(&self) -> &'static dyn FontMetrics

Resolve to the assigned font, or the built-in FONT_6X10 default.

Trait Implementations

impl Clone for WidgetFont

fn clone(&self) -> WidgetFont

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WidgetFont

impl Default for WidgetFont

fn default() -> WidgetFont

Returns the “default value” for a type.