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use crate::button;
use crate::checkbox;
use crate::pane_grid;
use crate::progress_bar;
use crate::radio;
use crate::renderer::{self, Renderer};
use crate::slider;
use crate::text;
use crate::text_input;
use crate::toggler;
use crate::{Font, Padding, Point, Rectangle, Size, Vector};
/// A renderer that does nothing.
///
/// It can be useful if you are writing tests!
#[derive(Debug, Clone, Copy)]
pub struct Null;
impl Null {
/// Creates a new [`Null`] renderer.
pub fn new() -> Null {
Null
}
}
impl Renderer for Null {
fn with_layer(
&mut self,
_bounds: Rectangle,
_offset: Vector<u32>,
_f: impl FnOnce(&mut Self),
) {
}
fn clear(&mut self) {}
fn fill_rectangle(&mut self, _quad: renderer::Quad) {}
}
impl renderer::Text for Null {
type Font = Font;
fn fill_text(&mut self, _text: renderer::text::Section<'_, Self::Font>) {}
}
impl text::Renderer for Null {
fn default_size(&self) -> u16 {
20
}
fn measure(
&self,
_content: &str,
_size: u16,
_font: Font,
_bounds: Size,
) -> (f32, f32) {
(0.0, 20.0)
}
fn hit_test(
&self,
_contents: &str,
_size: f32,
_font: Self::Font,
_bounds: Size,
_point: Point,
_nearest_only: bool,
) -> Option<text::Hit> {
None
}
}
impl text_input::Renderer for Null {
type Style = ();
fn measure_value(&self, _value: &str, _size: u16, _font: Font) -> f32 {
0.0
}
fn offset(
&self,
_text_bounds: Rectangle,
_font: Font,
_size: u16,
_value: &text_input::Value,
_state: &text_input::State,
) -> f32 {
0.0
}
}
impl button::Renderer for Null {
const DEFAULT_PADDING: Padding = Padding::ZERO;
type Style = ();
}
impl radio::Renderer for Null {
type Style = ();
const DEFAULT_SIZE: u16 = 20;
const DEFAULT_SPACING: u16 = 15;
}
impl checkbox::Renderer for Null {
type Style = ();
const DEFAULT_SIZE: u16 = 20;
const DEFAULT_SPACING: u16 = 15;
}
impl slider::Renderer for Null {
type Style = ();
const DEFAULT_HEIGHT: u16 = 30;
}
impl progress_bar::Renderer for Null {
type Style = ();
const DEFAULT_HEIGHT: u16 = 30;
}
impl pane_grid::Renderer for Null {
type Style = ();
}
impl toggler::Renderer for Null {
type Style = ();
const DEFAULT_SIZE: u16 = 20;
}
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