145 lines
3.7 KiB
Rust
145 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::widget::Tree;
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use crate::{Color, Element, Layout, Length, Point, Rectangle, Size, Widget};
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pub use iced_style::rule::{Appearance, FillMode, 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<Renderer>
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where
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Renderer: crate::Renderer,
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Renderer::Theme: StyleSheet,
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{
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width: Length,
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height: Length,
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is_horizontal: bool,
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style: <Renderer::Theme as StyleSheet>::Style,
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}
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impl<Renderer> Rule<Renderer>
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where
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Renderer: crate::Renderer,
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Renderer::Theme: StyleSheet,
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{
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/// Creates a horizontal [`Rule`] with the given height.
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pub fn horizontal(height: u16) -> Self {
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Rule {
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width: Length::Fill,
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height: Length::Units(height),
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is_horizontal: true,
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style: Default::default(),
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}
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}
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/// Creates a vertical [`Rule`] with the given width.
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pub fn vertical(width: u16) -> Self {
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Rule {
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width: Length::Units(width),
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height: Length::Fill,
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is_horizontal: false,
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style: 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: impl Into<<Renderer::Theme as StyleSheet>::Style>,
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) -> Self {
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self.style = style.into();
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self
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}
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}
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impl<Message, Renderer> Widget<Message, Renderer> for Rule<Renderer>
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where
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Renderer: crate::Renderer,
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Renderer::Theme: StyleSheet,
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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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_state: &Tree,
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renderer: &mut Renderer,
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theme: &Renderer::Theme,
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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 = theme.appearance(&self.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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}
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impl<'a, Message, Renderer> From<Rule<Renderer>>
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for Element<'a, Message, Renderer>
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where
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Message: 'a,
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Renderer: 'a + crate::Renderer,
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Renderer::Theme: StyleSheet,
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{
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fn from(rule: Rule<Renderer>) -> Element<'a, Message, Renderer> {
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Element::new(rule)
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}
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}
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