143 lines
3.7 KiB
Rust
143 lines
3.7 KiB
Rust
//! Display a horizontal or vertical rule for dividing content.
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use crate::layout;
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use crate::renderer;
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use crate::{
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Color, Element, Hasher, Layout, Length, Point, Rectangle, Size, Widget,
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};
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use std::hash::Hash;
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pub use iced_style::rule::{FillMode, Style, StyleSheet};
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/// Display a horizontal or vertical rule for dividing content.
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#[allow(missing_debug_implementations)]
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pub struct Rule<'a> {
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width: Length,
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height: Length,
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is_horizontal: bool,
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style_sheet: Box<dyn StyleSheet + 'a>,
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}
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impl<'a> Rule<'a> {
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/// Creates a horizontal [`Rule`] for dividing content by the given vertical spacing.
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pub fn horizontal(spacing: u16) -> Self {
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Rule {
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width: Length::Fill,
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height: Length::from(Length::Units(spacing)),
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is_horizontal: true,
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style_sheet: Default::default(),
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}
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}
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/// Creates a vertical [`Rule`] for dividing content by the given horizontal spacing.
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pub fn vertical(spacing: u16) -> Self {
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Rule {
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width: Length::from(Length::Units(spacing)),
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height: Length::Fill,
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is_horizontal: false,
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style_sheet: Default::default(),
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}
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}
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/// Sets the style of the [`Rule`].
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pub fn style(
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mut self,
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style_sheet: impl Into<Box<dyn StyleSheet + 'a>>,
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) -> Self {
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self.style_sheet = style_sheet.into();
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self
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}
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}
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impl<'a, Message, Renderer> Widget<Message, Renderer> for Rule<'a>
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where
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Renderer: crate::Renderer,
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{
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fn width(&self) -> Length {
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self.width
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}
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fn height(&self) -> Length {
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self.height
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}
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fn layout(
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&self,
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_renderer: &Renderer,
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limits: &layout::Limits,
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) -> layout::Node {
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let limits = limits.width(self.width).height(self.height);
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layout::Node::new(limits.resolve(Size::ZERO))
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}
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fn draw(
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&self,
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renderer: &mut Renderer,
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_style: &renderer::Style,
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layout: Layout<'_>,
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_cursor_position: Point,
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_viewport: &Rectangle,
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) {
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let bounds = layout.bounds();
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let style = self.style_sheet.style();
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let bounds = if self.is_horizontal {
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let line_y = (bounds.y + (bounds.height / 2.0)
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- (style.width as f32 / 2.0))
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.round();
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let (offset, line_width) = style.fill_mode.fill(bounds.width);
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let line_x = bounds.x + offset;
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Rectangle {
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x: line_x,
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y: line_y,
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width: line_width,
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height: style.width as f32,
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}
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} else {
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let line_x = (bounds.x + (bounds.width / 2.0)
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- (style.width as f32 / 2.0))
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.round();
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let (offset, line_height) = style.fill_mode.fill(bounds.height);
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let line_y = bounds.y + offset;
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Rectangle {
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x: line_x,
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y: line_y,
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width: style.width as f32,
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height: line_height,
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}
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};
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renderer.fill_quad(
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renderer::Quad {
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bounds,
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border_radius: style.radius,
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border_width: 0.0,
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border_color: Color::TRANSPARENT,
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},
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style.color,
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);
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}
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fn hash_layout(&self, state: &mut Hasher) {
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struct Marker;
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std::any::TypeId::of::<Marker>().hash(state);
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self.width.hash(state);
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self.height.hash(state);
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}
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}
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impl<'a, Message, Renderer> From<Rule<'a>> for Element<'a, Message, Renderer>
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where
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Renderer: 'a + crate::Renderer,
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Message: 'a,
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{
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fn from(rule: Rule<'a>) -> Element<'a, Message, Renderer> {
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Element::new(rule)
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}
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}
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