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59 lines
1.2 KiB
Rust
59 lines
1.2 KiB
Rust
use std::slice;
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use super::Shape;
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use crate::style::Color;
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/// A shape to draw a group of points with the given color
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pub struct Points<'a> {
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pub coords: &'a [(f64, f64)],
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pub color: Color,
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}
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impl<'a> Shape<'a> for Points<'a> {
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fn color(&self) -> Color {
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self.color
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}
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fn points(&'a self) -> Box<Iterator<Item = (f64, f64)> + 'a> {
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Box::new(self.into_iter())
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}
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}
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impl<'a> Default for Points<'a> {
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fn default() -> Points<'a> {
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Points {
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coords: &[],
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color: Color::Reset,
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}
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}
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}
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impl<'a> IntoIterator for &'a Points<'a> {
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type Item = (f64, f64);
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type IntoIter = PointsIterator<'a>;
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fn into_iter(self) -> Self::IntoIter {
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PointsIterator {
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iter: self.coords.iter(),
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}
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}
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}
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pub struct PointsIterator<'a> {
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iter: slice::Iter<'a, (f64, f64)>,
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}
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impl<'a> From<&'a [(f64, f64)]> for PointsIterator<'a> {
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fn from(data: &'a [(f64, f64)]) -> PointsIterator<'a> {
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PointsIterator { iter: data.iter() }
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}
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}
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impl<'a> Iterator for PointsIterator<'a> {
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type Item = (f64, f64);
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fn next(&mut self) -> Option<Self::Item> {
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match self.iter.next() {
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Some(p) => Some(*p),
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None => None,
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}
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}
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}
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