Struct iced_native::renderer::Null

pub struct Null;

A renderer that does nothing.

It can be useful if you are writing tests!

Implementations

impl Null

pub fn new() -> Null

Creates a new Null renderer.

Trait Implementations

impl Clone for Null

fn clone(&self) -> Null

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Null

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

Formats the value using the given formatter.

impl Renderer for Null

fn with_layer(&mut self, _bounds: Rectangle, _f: impl FnOnce(&mut Self))

Draws the primitives recorded in the given closure in a new layer.

fn with_translation(&mut self, _translation: Vector, _f: impl FnOnce(&mut Self))

Applies a translation to the primitives recorded in the given closure.

fn clear(&mut self)

Clears all of the recorded primitives in the Renderer.

fn fill_quad(&mut self, _quad: Quad, _background: impl Into<Background>)

Fills a Quad with the provided Background.

fn layout<'a, Message>(
    &mut self,
    element: &Element<'a, Message, Self>,
    limits: &Limits
) -> Node

Lays out the elements of a user interface.

impl Renderer for Null

type Font = Font

The font type used.

const ICON_FONT: Font = Font::Default

The icon font of the backend.

const CHECKMARK_ICON: char = '0'

The char representing a ✔ icon in the ICON_FONT.

const ARROW_DOWN_ICON: char = '0'

The char representing a ▼ icon in the built-in ICON_FONT.

fn default_size(&self) -> u16

Returns the default size of Text.

fn measure(
    &self,
    _content: &str,
    _size: u16,
    _font: Font,
    _bounds: Size
) -> (f32, f32)

Measures the text in the given bounds and returns the minimum boundaries that can fit the contents.

fn hit_test(
    &self,
    _contents: &str,
    _size: f32,
    _font: Self::Font,
    _bounds: Size,
    _point: Point,
    _nearest_only: bool
) -> Option<Hit>

Tests whether the provided point is within the boundaries of text laid out with the given parameters, returning information about the nearest character.

fn fill_text(&mut self, _text: Text<'_, Self::Font>)

Draws the given Text.

fn measure_width(&self, content: &str, size: u16, font: Self::Font) -> f32

Measures the width of the text as if it were laid out in a single line.

impl Copy for Null