Struct egui::FontDefinitions[−][src]

pub struct FontDefinitions {
    pub font_data: BTreeMap<String, Cow<'static, [u8]>>,
    pub fonts_for_family: BTreeMap<FontFamily, Vec<String, Global>>,
    pub family_and_size: BTreeMap<TextStyle, (FontFamily, f32)>,
}

Expand description

Describes the font data and the sizes to use.

Often you would start with FontDefinitions::default() and then add/change the contents.

let mut fonts = FontDefinitions::default();

// Large button text:
fonts.family_and_size.insert(
    TextStyle::Button,
    (FontFamily::Proportional, 32.0)
);

ctx.set_fonts(fonts);

You can also install your own custom fonts:

let mut fonts = FontDefinitions::default();

// Install my own font (maybe supporting non-latin characters):
fonts.font_data.insert("my_font".to_owned(),
   std::borrow::Cow::Borrowed(include_bytes!("../../fonts/Ubuntu-Light.ttf"))); // .ttf and .otf supported

// Put my font first (highest priority):
fonts.fonts_for_family.get_mut(&FontFamily::Proportional).unwrap()
    .insert(0, "my_font".to_owned());

// Put my font as last fallback for monospace:
fonts.fonts_for_family.get_mut(&FontFamily::Monospace).unwrap()
    .push("my_font".to_owned());

ctx.set_fonts(fonts);

Fields

font_data: BTreeMap<String, Cow<'static, [u8]>>

List of font names and their definitions. The definition must be the contents of either a .ttf or .otf font file.

epaint has built-in-default for these, but you can override them if you like.

fonts_for_family: BTreeMap<FontFamily, Vec<String, Global>>

Which fonts (names) to use for each FontFamily.

The list should be a list of keys into Self::font_data. When looking for a character glyph epaint will start with the first font and then move to the second, and so on. So the first font is the primary, and then comes a list of fallbacks in order of priority.

family_and_size: BTreeMap<TextStyle, (FontFamily, f32)>

The FontFamily and size you want to use for a specific TextStyle.

Trait Implementations

impl Clone for FontDefinitions

pub fn clone(&self) -> FontDefinitions

Returns a copy of the value. Read more

1.0.0[src]

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

Performs copy-assignment from source. Read more

impl Debug for FontDefinitions

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

Formats the value using the given formatter. Read more

impl Default for FontDefinitions

pub fn default() -> FontDefinitions

Returns the “default value” for a type. Read more

impl PartialEq<FontDefinitions> for FontDefinitions

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

This method tests for self and other values to be equal, and is used by ==. Read more

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

This method tests for !=.

impl Widget for &mut FontDefinitions

fn ui(self, ui: &mut Ui) -> Response

Allocate space, interact, paint, and return a Response. Read more

impl StructuralPartialEq for FontDefinitions

Auto Trait Implementations

impl RefUnwindSafe for FontDefinitions

impl Send for FontDefinitions

impl Sync for FontDefinitions

impl Unpin for FontDefinitions

impl UnwindSafe for FontDefinitions

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized,

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

pub fn from(t: T) -> T

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>,

pub fn into(self) -> U

Performs the conversion.

impl<T> ToOwned for T where
    T: Clone,

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.