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use crate::{
layout, Element, Hasher, Layout, Length, Point, Rectangle, Size, Widget,
};
use std::{hash::Hash, ops::RangeInclusive};
#[allow(missing_debug_implementations)]
pub struct ProgressBar<Renderer: self::Renderer> {
range: RangeInclusive<f32>,
value: f32,
width: Length,
height: Option<Length>,
style: Renderer::Style,
}
impl<Renderer: self::Renderer> ProgressBar<Renderer> {
pub fn new(range: RangeInclusive<f32>, value: f32) -> Self {
ProgressBar {
value: value.max(*range.start()).min(*range.end()),
range,
width: Length::Fill,
height: None,
style: Renderer::Style::default(),
}
}
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
pub fn height(mut self, height: Length) -> Self {
self.height = Some(height);
self
}
pub fn style(mut self, style: impl Into<Renderer::Style>) -> Self {
self.style = style.into();
self
}
}
impl<Message, Renderer> Widget<Message, Renderer> for ProgressBar<Renderer>
where
Renderer: self::Renderer,
{
fn width(&self) -> Length {
self.width
}
fn height(&self) -> Length {
self.height
.unwrap_or(Length::Units(Renderer::DEFAULT_HEIGHT))
}
fn layout(
&self,
_renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let limits = limits.width(self.width).height(
self.height
.unwrap_or(Length::Units(Renderer::DEFAULT_HEIGHT)),
);
let size = limits.resolve(Size::ZERO);
layout::Node::new(size)
}
fn draw(
&self,
renderer: &mut Renderer,
_defaults: &Renderer::Defaults,
layout: Layout<'_>,
_cursor_position: Point,
) -> Renderer::Output {
renderer.draw(
layout.bounds(),
self.range.clone(),
self.value,
&self.style,
)
}
fn hash_layout(&self, state: &mut Hasher) {
struct Marker;
std::any::TypeId::of::<Marker>().hash(state);
self.width.hash(state);
self.height.hash(state);
}
}
pub trait Renderer: crate::Renderer {
type Style: Default;
const DEFAULT_HEIGHT: u16;
fn draw(
&self,
bounds: Rectangle,
range: RangeInclusive<f32>,
value: f32,
style: &Self::Style,
) -> Self::Output;
}
impl<'a, Message, Renderer> From<ProgressBar<Renderer>>
for Element<'a, Message, Renderer>
where
Renderer: 'a + self::Renderer,
Message: 'a,
{
fn from(
progress_bar: ProgressBar<Renderer>,
) -> Element<'a, Message, Renderer> {
Element::new(progress_bar)
}
}