//! Allow your users to perform actions by pressing a button. use iced_core::{Background, Color, Vector}; /// The appearance of a button. #[derive(Debug)] pub struct Style { pub shadow_offset: Vector, pub background: Option, 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 { fn active(&self) -> Style; fn hovered(&self) -> Style { let active = self.active(); Style { shadow_offset: active.shadow_offset + Vector::new(0.0, 1.0), ..active } } fn pressed(&self) -> Style { Style { shadow_offset: Vector::default(), ..self.active() } } fn disabled(&self) -> Style { let active = self.active(); 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 } } } struct Default; impl StyleSheet for Default { fn active(&self) -> Style { Style { shadow_offset: Vector::new(0.0, 0.0), background: Some(Background::Color([0.87, 0.87, 0.87].into())), border_radius: 2.0, border_width: 1.0, border_color: [0.7, 0.7, 0.7].into(), text_color: Color::BLACK, } } } impl std::default::Default for Box { fn default() -> Self { Box::new(Default) } } impl From for Box where T: 'static + StyleSheet, { fn from(style: T) -> Self { Box::new(style) } }