Struct epaint::text::LayoutJob

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pub struct LayoutJob {
    pub text: String,
    pub sections: Vec<LayoutSection>,
    pub wrap: TextWrapping,
    pub first_row_min_height: f32,
    pub break_on_newline: bool,
    pub halign: Align,
    pub justify: bool,
}
Expand description

Describes the task of laying out text.

This supports mixing different fonts, color and formats (underline etc).

Pass this to crate::Fonts::layout_job or crate::text::layout.

Example:

use epaint::{Color32, text::{LayoutJob, TextFormat}, FontFamily, FontId};

let mut job = LayoutJob::default();
job.append(
    "Hello ",
    0.0,
    TextFormat {
        font_id: FontId::new(14.0, FontFamily::Proportional),
        color: Color32::WHITE,
        ..Default::default()
    },
);
job.append(
    "World!",
    0.0,
    TextFormat {
        font_id: FontId::new(14.0, FontFamily::Monospace),
        color: Color32::BLACK,
        ..Default::default()
    },
);

As you can see, constructing a LayoutJob is currently a lot of work. It would be nice to have a helper macro for it!

Fields§

§text: String

The complete text of this job, referenced by LayoutSection.

§sections: Vec<LayoutSection>

The different section, which can have different fonts, colors, etc.

§wrap: TextWrapping

Controls the text wrapping and elision.

§first_row_min_height: f32

The first row must be at least this high. This is in case we lay out text that is the continuation of some earlier text (sharing the same row), in which case this will be the height of the earlier text. In other cases, set this to 0.0.

§break_on_newline: bool

If true, all \n characters will result in a new paragraph, starting on a new row.

If false, all \n characters will be ignored and show up as the replacement character.

Default: true.

§halign: Align

How to horizontally align the text (Align::LEFT, Align::Center, Align::RIGHT).

§justify: bool

Justify text so that word-wrapped rows fill the whole TextWrapping::max_width.

Implementations§

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impl LayoutJob

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pub fn simple( text: String, font_id: FontId, color: Color32, wrap_width: f32 ) -> Self

Break on \n and at the given wrap width.

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pub fn simple_singleline(text: String, font_id: FontId, color: Color32) -> Self

Does not break on \n, but shows the replacement character instead.

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pub fn single_section(text: String, format: TextFormat) -> Self

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pub fn is_empty(&self) -> bool

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pub fn append(&mut self, text: &str, leading_space: f32, format: TextFormat)

Helper for adding a new section when building a LayoutJob.

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pub fn font_height(&self, fonts: &Fonts) -> f32

The height of the tallest font used in the job.

Trait Implementations§

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impl Clone for LayoutJob

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fn clone(&self) -> LayoutJob

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for LayoutJob

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

Formats the value using the given formatter. Read more
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impl Default for LayoutJob

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fn default() -> Self

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

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for LayoutJob

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for LayoutJob

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.