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|
//! Allow your users to perform actions by pressing a button.
use iced_core::{Background, Color, Vector};
/// The appearance of a button.
#[derive(Debug, Clone, Copy)]
pub struct Style {
pub shadow_offset: Vector,
pub background: Option<Background>,
pub border_radius: f32,
pub border_width: f32,
pub border_color: Color,
pub text_color: Color,
}
impl std::default::Default for Style {
fn default() -> Self {
Self {
shadow_offset: Vector::default(),
background: None,
border_radius: 0.0,
border_width: 0.0,
border_color: Color::TRANSPARENT,
text_color: Color::BLACK,
}
}
}
/// A set of rules that dictate the style of a button.
pub trait StyleSheet {
type Variant;
fn active(&self, variant: Self::Variant) -> Style;
fn hovered(&self, variant: Self::Variant) -> Style {
let active = self.active(variant);
Style {
shadow_offset: active.shadow_offset + Vector::new(0.0, 1.0),
..active
}
}
fn pressed(&self, variant: Self::Variant) -> Style {
Style {
shadow_offset: Vector::default(),
..self.active(variant)
}
}
fn disabled(&self, variant: Self::Variant) -> Style {
let active = self.active(variant);
Style {
shadow_offset: Vector::default(),
background: active.background.map(|background| match background {
Background::Color(color) => Background::Color(Color {
a: color.a * 0.5,
..color
}),
}),
text_color: Color {
a: active.text_color.a * 0.5,
..active.text_color
},
..active
}
}
}
|
