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|
//! Display an icon.
use crate::{
layout, Element, Hasher, Layout, Length, Point, Rectangle, Widget,
};
use std::{
hash::Hash,
path::{Path, PathBuf},
};
/// A simple icon_loader widget.
#[derive(Debug, Clone)]
pub struct Icon {
path: PathBuf,
size: Length,
}
impl Icon {
/// Create a new [`Icon`] from the file at `path`.
///
/// [`Icon`]: struct.Icon.html
pub fn new(path: impl Into<PathBuf>) -> Self {
Icon {
path: path.into(),
size: Length::Fill,
}
}
/// Sets the size of the [`Icon`].
///
/// [`Icon`]: struct.Icon.html
pub fn size(mut self, size: Length) -> Self {
self.size = size;
self
}
}
impl<Message, Renderer> Widget<Message, Renderer> for Icon
where
Renderer: self::Renderer,
{
fn width(&self) -> Length {
self.size
}
fn height(&self) -> Length {
self.size
}
fn layout(&self, _: &Renderer, limits: &layout::Limits) -> layout::Node {
let mut size = limits.width(self.size).height(self.size).max();
if size.width > size.height {
size.width = size.height;
} else if size.width < size.height {
size.height = size.width;
}
layout::Node::new(size)
}
fn draw(
&self,
renderer: &mut Renderer,
layout: Layout<'_>,
_cursor_position: Point,
) -> Renderer::Output {
let bounds = layout.bounds();
renderer.draw(bounds, self.path.as_path())
}
fn hash_layout(&self, state: &mut Hasher) {
self.size.hash(state);
}
}
/// The renderer of an [`Icon`].
///
/// Your [renderer] will need to implement this trait before being
/// able to use [`Icon`] in your [`UserInterface`].
///
/// [`Icon`]: struct.Icon.html
/// [renderer]: ../../renderer/index.html
/// [`UserInterface`]: ../../struct.UserInterface.html
pub trait Renderer: crate::Renderer {
/// Draws an [`Icon`].
///
/// [`Icon`]: struct.Icon.html
fn draw(&mut self, bounds: Rectangle, path: &Path) -> Self::Output;
}
impl<'a, Message, Renderer> From<Icon> for Element<'a, Message, Renderer>
where
Renderer: self::Renderer,
{
fn from(icon: Icon) -> Element<'a, Message, Renderer> {
Element::new(icon)
}
}
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