path: root/style/src/slider.rs

//! Change the apperance of a slider.
use crate::core::border;
use crate::core::{Color, Pixels};

/// The appearance of a slider.
#[derive(Debug, Clone, Copy)]
pub struct Appearance {
    /// The colors of the rail of the slider.
    pub rail: Rail,
    /// The appearance of the [`Handle`] of the slider.
    pub handle: Handle,
}

impl Appearance {
    /// Changes the [`HandleShape`] of the [`Appearance`] to a circle
    /// with the given radius.
    pub fn with_circular_handle(mut self, radius: impl Into<Pixels>) -> Self {
        self.handle.shape = HandleShape::Circle {
            radius: radius.into().0,
        };
        self
    }
}

/// The appearance of a slider rail
#[derive(Debug, Clone, Copy)]
pub struct Rail {
    /// The colors of the rail of the slider.
    pub colors: (Color, Color),
    /// The width of the stroke of a slider rail.
    pub width: f32,
    /// The border radius of the corners of the rail.
    pub border_radius: border::Radius,
}

/// The appearance of the handle of a slider.
#[derive(Debug, Clone, Copy)]
pub struct Handle {
    /// The shape of the handle.
    pub shape: HandleShape,
    /// The [`Color`] of the handle.
    pub color: Color,
    /// The border width of the handle.
    pub border_width: f32,
    /// The border [`Color`] of the handle.
    pub border_color: Color,
}

/// The shape of the handle of a slider.
#[derive(Debug, Clone, Copy)]
pub enum HandleShape {
    /// A circular handle.
    Circle {
        /// The radius of the circle.
        radius: f32,
    },
    /// A rectangular shape.
    Rectangle {
        /// The width of the rectangle.
        width: u16,
        /// The border radius of the corners of the rectangle.
        border_radius: border::Radius,
    },
}

/// A set of rules that dictate the style of a slider.
pub trait StyleSheet {
    fn default() -> fn(&Self, Status) -> Appearance;
}

pub enum Status {
    Active,
    Hovered,
    Dragging,
}