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.

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

Performs copy-assignment from source.

impl Copy for Null

impl Debug for Null

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

Formats the value using the given formatter.

impl Renderer for Null

type Output = ()

The type of output of the Renderer.

type Defaults = ()

The default styling attributes of the Renderer.

fn overlay(&mut self, _base: (), _overlay: (), _overlay_bounds: Rectangle)

Overlays the overlay output with the given bounds on top of the base output.

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

const DEFAULT_PADDING: u16

The default padding of a Button.

type Style = ()

The style supported by this renderer.

fn draw<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _bounds: Rectangle,
    _cursor_position: Point,
    _is_disabled: bool,
    _is_pressed: bool,
    _style: &Self::Style,
    _content: &Element<'_, Message, Self>,
    _content_layout: Layout<'_>
) -> Self::Output

Draws a Button.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

const DEFAULT_HEIGHT: u16

The default height of a Slider.

fn draw(
    &mut self,
    _bounds: Rectangle,
    _cursor_position: Point,
    _range: RangeInclusive<f32>,
    _value: f32,
    _is_dragging: bool,
    _style_sheet: &Self::Style
)

Draws a Slider.

impl Renderer for Null

type Font = Font

The font type used for Text.

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 draw(
    &mut self,
    _defaults: &Self::Defaults,
    _bounds: Rectangle,
    _content: &str,
    _size: u16,
    _font: Font,
    _color: Option<Color>,
    _horizontal_alignment: HorizontalAlignment,
    _vertical_alignment: VerticalAlignment
)

Draws a Text fragment.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

fn measure_value(&self, _value: &str, _size: u16, _font: Font) -> f32

Returns the width of the value of the TextInput.

fn offset(
    &self,
    _text_bounds: Rectangle,
    _font: Font,
    _size: u16,
    _value: &Value,
    _state: &State
) -> f32

Returns the current horizontal offset of the value of the TextInput.

fn draw(
    &mut self,
    _bounds: Rectangle,
    _text_bounds: Rectangle,
    _cursor_position: Point,
    _font: Font,
    _size: u16,
    _placeholder: &str,
    _value: &Value,
    _state: &State,
    _style: &Self::Style
) -> Self::Output

Draws a TextInput.

fn find_cursor_position(
    &self,
    text_bounds: Rectangle,
    font: Self::Font,
    size: Option<u16>,
    value: &Value,
    state: &State,
    x: f32
) -> usize

Computes the position of the text cursor at the given X coordinate of a TextInput.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

const DEFAULT_SIZE: u16

The default size of a Checkbox.

const DEFAULT_SPACING: u16

The default spacing of a Checkbox.

fn draw(
    &mut self,
    _bounds: Rectangle,
    _is_checked: bool,
    _is_mouse_over: bool,
    _label: Self::Output,
    _style: &Self::Style
)

Draws a Checkbox.

impl Renderer for Null

fn draw<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _content: &[Element<'_, Message, Self>],
    _layout: Layout<'_>,
    _cursor_position: Point,
    _viewport: &Rectangle
)

Draws a Column.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

fn draw<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _bounds: Rectangle,
    _cursor_position: Point,
    _viewport: &Rectangle,
    _style: &Self::Style,
    _content: &Element<'_, Message, Self>,
    _content_layout: Layout<'_>
)

Draws a Container.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

fn draw<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _content: &[(Pane, Content<'_, Message, Self>)],
    _dragging: Option<(Pane, Point)>,
    _resizing: Option<(Axis, Rectangle, bool)>,
    _layout: Layout<'_>,
    _style: &Self::Style,
    _cursor_position: Point,
    _viewport: &Rectangle
)

Draws a PaneGrid.

fn draw_pane<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _bounds: Rectangle,
    _style: &Self::Style,
    _title_bar: Option<(&TitleBar<'_, Message, Self>, Layout<'_>)>,
    _body: (&Element<'_, Message, Self>, Layout<'_>),
    _cursor_position: Point,
    _viewport: &Rectangle
)

Draws a Pane.

fn draw_title_bar<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _bounds: Rectangle,
    _style: &Self::Style,
    _content: (&Element<'_, Message, Self>, Layout<'_>),
    _controls: Option<(&Element<'_, Message, Self>, Layout<'_>)>,
    _cursor_position: Point,
    _viewport: &Rectangle
)

Draws a TitleBar.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

const DEFAULT_HEIGHT: u16

The default height of a ProgressBar.

fn draw(
    &self,
    _bounds: Rectangle,
    _range: RangeInclusive<f32>,
    _value: f32,
    _style: &Self::Style
)

Draws a ProgressBar.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

const DEFAULT_SIZE: u16

The default size of a Radio button.

const DEFAULT_SPACING: u16

The default spacing of a Radio button.

fn draw(
    &mut self,
    _bounds: Rectangle,
    _is_selected: bool,
    _is_mouse_over: bool,
    _label: Self::Output,
    _style: &Self::Style
)

Draws a Radio button.

impl Renderer for Null

fn draw<Message>(
    &mut self,
    _defaults: &Self::Defaults,
    _content: &[Element<'_, Message, Self>],
    _layout: Layout<'_>,
    _cursor_position: Point,
    _viewport: &Rectangle
)

Draws a Row.

impl Renderer for Null

type Style = ()

The style supported by this renderer.

fn scrollbar(
    &self,
    _bounds: Rectangle,
    _content_bounds: Rectangle,
    _offset: u32,
    _scrollbar_width: u16,
    _scrollbar_margin: u16,
    _scroller_width: u16
) -> Option<Scrollbar>

Returns the Scrollbar given the bounds and content bounds of a Scrollable.

fn draw(
    &mut self,
    _scrollable: &State,
    _bounds: Rectangle,
    _content_bounds: Rectangle,
    _is_mouse_over: bool,
    _is_mouse_over_scrollbar: bool,
    _scrollbar: Option<Scrollbar>,
    _offset: u32,
    _style: &Self::Style,
    _content: Self::Output
)

Draws the Scrollable.