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use crate::{
draw_target::DrawTarget,
geometry::{Dimensions, Point},
pixelcolor::PixelColor,
primitives::OffsetOutline,
primitives::{PrimitiveStyle, Rectangle},
transform::Transform,
Drawable,
};
/// Styled.
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Default)]
#[cfg_attr(feature = "defmt", derive(::defmt::Format))]
pub struct Styled<T, S> {
/// Primitive.
pub primitive: T,
/// Style.
pub style: S,
}
impl<T, S> Styled<T, S> {
/// Creates a styled.
pub const fn new(primitive: T, style: S) -> Self {
Self { primitive, style }
}
}
impl<T: OffsetOutline, C: PixelColor> Styled<T, PrimitiveStyle<C>> {
/// Returns the fill area.
///
/// The returned primitive coincides with the area that would be filled by calling [`draw`]
/// on this styled primitive.
///
/// # Examples
///
/// ```
/// use embedded_graphics::{
/// pixelcolor::Rgb888,
/// prelude::*,
/// primitives::{Circle, PrimitiveStyleBuilder},
/// };
///
/// let style = PrimitiveStyleBuilder::new()
/// .fill_color(Rgb888::RED)
/// .stroke_color(Rgb888::GREEN)
/// .stroke_width(6)
/// .build();
///
/// let center = Point::new(10, 20);
/// let diameter = 10;
///
/// let circle = Circle::with_center(center, diameter).into_styled(style);
///
/// assert_eq!(circle.fill_area(), Circle::with_center(center, diameter - style.stroke_width));
/// ```
///
/// [`draw`]: crate::Drawable::draw
pub fn fill_area(&self) -> T {
self.style.fill_area(&self.primitive)
}
/// Returns the stroke area.
///
/// The outer edge of the returned primitive coincides with the outer edge of the stroke that
/// would be drawn by calling [`draw`] on this styled primitive.
///
/// # Examples
///
/// This example tests if a point lies on the stroke. Because the stoke area surrounds the
/// stoke and fill an additional test is required to check that the point is not inside the fill
/// area.
///
/// ```
/// use embedded_graphics::{
/// pixelcolor::Rgb888,
/// prelude::*,
/// primitives::{Circle, PrimitiveStyle},
/// };
///
/// let style = PrimitiveStyle::with_stroke(Rgb888::RED, 6);
///
/// let center = Point::new(10, 20);
/// let diameter = 10;
///
/// let circle = Circle::with_center(center, diameter).into_styled(style);
///
/// // A point lies on the stroke if it is inside the stroke area but not in the fill area.
/// let is_on_stroke = |p| circle.stroke_area().contains(p) && !circle.fill_area().contains(p);
///
/// assert!(is_on_stroke(center + Size::new(0, diameter / 2)));
/// assert!(!is_on_stroke(center));
/// ```
///
/// [`draw`]: crate::Drawable::draw
pub fn stroke_area(&self) -> T {
self.style.stroke_area(&self.primitive)
}
}
impl<T: StyledPixels<S>, S> Styled<T, S> {
/// Returns an iterator over the pixels in this styled primitive.
pub fn pixels(&self) -> T::Iter {
self.primitive.pixels(&self.style)
}
}
impl<T: StyledDimensions<S>, S> Dimensions for Styled<T, S> {
fn bounding_box(&self) -> Rectangle {
self.primitive.styled_bounding_box(&self.style)
}
}
impl<T: StyledDrawable<S>, S> Drawable for Styled<T, S> {
type Color = T::Color;
type Output = T::Output;
fn draw<D>(&self, target: &mut D) -> Result<Self::Output, D::Error>
where
D: DrawTarget<Color = Self::Color>,
{
self.primitive.draw_styled(&self.style, target)
}
}
impl<T: Transform, S: Clone> Transform for Styled<T, S> {
fn translate(&self, by: Point) -> Self {
Self {
primitive: self.primitive.translate(by),
style: self.style.clone(),
}
}
fn translate_mut(&mut self, by: Point) -> &mut Self {
self.primitive.translate_mut(by);
self
}
}
/// Styled drawable.
pub trait StyledDrawable<S> {
/// Color type.
type Color: PixelColor;
/// Output type.
type Output;
/// Draws the primitive using the given style.
fn draw_styled<D>(&self, style: &S, target: &mut D) -> Result<Self::Output, D::Error>
where
D: DrawTarget<Color = Self::Color>;
}
/// Styled dimensions.
pub trait StyledDimensions<S> {
/// Returns the bounding box using the given style.
fn styled_bounding_box(&self, style: &S) -> Rectangle;
}
/// Styled drawable.
pub trait StyledPixels<S> {
/// Iterator type.
type Iter;
/// Returns an iterator over all pixels in this styled primitive.
fn pixels(&self, style: &S) -> Self::Iter;
}