76 lines
1.8 KiB
Rust
76 lines
1.8 KiB
Rust
//! Navigate an endless amount of content with a scrollbar.
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use iced_core::{Background, Color};
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/// The appearance of a scrollable.
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#[derive(Debug, Clone, Copy)]
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pub struct Scrollbar {
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pub background: Option<Background>,
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pub border_radius: u16,
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pub border_width: u16,
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pub border_color: Color,
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pub scroller: Scroller,
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}
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/// The appearance of the scroller of a scrollable.
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#[derive(Debug, Clone, Copy)]
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pub struct Scroller {
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pub color: Color,
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pub border_radius: u16,
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pub border_width: u16,
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pub border_color: Color,
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}
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/// A set of rules that dictate the style of a scrollable.
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pub trait StyleSheet {
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/// Produces the style of an active scrollbar.
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fn active(&self) -> Scrollbar;
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/// Produces the style of an hovered scrollbar.
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fn hovered(&self) -> Scrollbar;
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/// Produces the style of a scrollbar that is being dragged.
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fn dragging(&self) -> Scrollbar {
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self.hovered()
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}
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}
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struct Default;
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impl StyleSheet for Default {
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fn active(&self) -> Scrollbar {
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Scrollbar {
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background: None,
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border_radius: 5,
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border_width: 0,
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border_color: Color::TRANSPARENT,
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scroller: Scroller {
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color: [0.0, 0.0, 0.0, 0.7].into(),
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border_radius: 5,
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border_width: 0,
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border_color: Color::TRANSPARENT,
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},
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}
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}
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fn hovered(&self) -> Scrollbar {
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Scrollbar {
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background: Some(Background::Color([0.0, 0.0, 0.0, 0.3].into())),
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..self.active()
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}
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}
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}
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impl std::default::Default for Box<dyn StyleSheet> {
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fn default() -> Self {
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Box::new(Default)
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}
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}
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impl<T> From<T> for Box<dyn StyleSheet>
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where
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T: 'static + StyleSheet,
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{
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fn from(style: T) -> Self {
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Box::new(style)
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}
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}
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