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//! Change the appearance of a container.
use crate::core::{Background, BorderRadius, Color, Pixels};
/// The appearance of a container.
#[derive(Debug, Clone, Copy)]
pub struct Appearance {
/// The text [`Color`] of the container.
pub text_color: Option<Color>,
/// The [`Background`] of the container.
pub background: Option<Background>,
/// The border radius of the container.
pub border_radius: BorderRadius,
/// The border width of the container.
pub border_width: f32,
/// The border [`Color`] of the container.
pub border_color: Color,
}
impl Appearance {
/// Derives a new [`Appearance`] with a border of the given [`Color`] and
/// `width`.
pub fn with_border(
self,
color: impl Into<Color>,
width: impl Into<Pixels>,
) -> Self {
Self {
border_color: color.into(),
border_width: width.into().0,
..self
}
}
/// Derives a new [`Appearance`] with the given [`Background`].
pub fn with_background(self, background: impl Into<Background>) -> Self {
Self {
background: Some(background.into()),
..self
}
}
}
impl std::default::Default for Appearance {
fn default() -> Self {
Self {
text_color: None,
background: None,
border_radius: 0.0.into(),
border_width: 0.0,
border_color: Color::TRANSPARENT,
}
}
}
/// A set of rules that dictate the [`Appearance`] of a container.
pub trait StyleSheet {
/// The supported style of the [`StyleSheet`].
type Style: Default;
/// Produces the [`Appearance`] of a container.
fn appearance(&self, style: &Self::Style) -> Appearance;
}
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