79 lines
2.4 KiB
Rust
79 lines
2.4 KiB
Rust
//! Change the apperance of a button.
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use iced_core::{Background, Border, Color, Shadow, Vector};
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/// The appearance of a button.
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#[derive(Debug, Clone, Copy)]
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pub struct Appearance {
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/// The amount of offset to apply to the shadow of the button.
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pub shadow_offset: Vector,
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/// The [`Background`] of the button.
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pub background: Option<Background>,
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/// The text [`Color`] of the button.
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pub text_color: Color,
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/// The [`Border`] of the buton.
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pub border: Border,
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/// The [`Shadow`] of the butoon.
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pub shadow: Shadow,
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}
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impl std::default::Default for Appearance {
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fn default() -> Self {
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Self {
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shadow_offset: Vector::default(),
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background: None,
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text_color: Color::BLACK,
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border: Border::default(),
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shadow: Shadow::default(),
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}
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}
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}
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/// A set of rules that dictate the style of a button.
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pub trait StyleSheet {
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/// The supported style of the [`StyleSheet`].
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type Style: Default;
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/// Produces the active [`Appearance`] of a button.
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fn active(&self, style: &Self::Style) -> Appearance;
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/// Produces the hovered [`Appearance`] of a button.
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fn hovered(&self, style: &Self::Style) -> Appearance {
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let active = self.active(style);
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Appearance {
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shadow_offset: active.shadow_offset + Vector::new(0.0, 1.0),
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..active
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}
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}
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/// Produces the pressed [`Appearance`] of a button.
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fn pressed(&self, style: &Self::Style) -> Appearance {
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Appearance {
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shadow_offset: Vector::default(),
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..self.active(style)
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}
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}
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/// Produces the disabled [`Appearance`] of a button.
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fn disabled(&self, style: &Self::Style) -> Appearance {
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let active = self.active(style);
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Appearance {
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shadow_offset: Vector::default(),
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background: active.background.map(|background| match background {
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Background::Color(color) => Background::Color(Color {
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a: color.a * 0.5,
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..color
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}),
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Background::Gradient(gradient) => {
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Background::Gradient(gradient.mul_alpha(0.5))
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}
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}),
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text_color: Color {
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a: active.text_color.a * 0.5,
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..active.text_color
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},
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..active
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}
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}
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}
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