woocraft 0.4.5

GPUI components lib for Woocraft design system.
Documentation 
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use gpui::{App, Bounds, Hsla, PaintQuad, Pixels, Point, Window, fill, point, px};

use crate::base::plot::{
  label::{PlotLabel, TEXT_GAP, TEXT_HEIGHT, Text},
  origin_point,
};

#[allow(clippy::type_complexity)]
pub struct Bar<T> {
  data: Vec<T>,
  x: Box<dyn Fn(&T) -> Option<f32>>,
  band_width: f32,
  y0: Box<dyn Fn(&T) -> f32>,
  y1: Box<dyn Fn(&T) -> Option<f32>>,
  fill: Box<dyn Fn(&T) -> Hsla>,
  label: Option<Box<dyn Fn(&T, Point<Pixels>) -> Vec<Text>>>,
}

impl<T> Default for Bar<T> {
  fn default() -> Self {
    Self {
      data: Vec::new(),
      x: Box::new(|_| None),
      band_width: 0.,
      y0: Box::new(|_| 0.),
      y1: Box::new(|_| None),
      fill: Box::new(|_| gpui::black()),
      label: None,
    }
  }
}

impl<T> Bar<T> {
  pub fn new() -> Self {
    Self::default()
  }

  /// Set the data of the Bar.
  pub fn data<I>(mut self, data: I) -> Self
  where
    I: IntoIterator<Item = T>, {
    self.data = data.into_iter().collect();
    self
  }

  /// Set the x of the Bar.
  pub fn x<F>(mut self, x: F) -> Self
  where
    F: Fn(&T) -> Option<f32> + 'static, {
    self.x = Box::new(x);
    self
  }

  /// Set the band width of the Bar.
  pub fn band_width(mut self, band_width: f32) -> Self {
    self.band_width = band_width;
    self
  }

  /// Set the y0 of the Bar.
  pub fn y0<F>(mut self, y: F) -> Self
  where
    F: Fn(&T) -> f32 + 'static, {
    self.y0 = Box::new(y);
    self
  }

  /// Set the y1 of the Bar.
  pub fn y1<F>(mut self, y: F) -> Self
  where
    F: Fn(&T) -> Option<f32> + 'static, {
    self.y1 = Box::new(y);
    self
  }

  /// Set the fill color of the Bar.
  pub fn fill<F, C>(mut self, fill: F) -> Self
  where
    F: Fn(&T) -> C + 'static,
    C: Into<Hsla>, {
    self.fill = Box::new(move |v| fill(v).into());
    self
  }

  /// Set the label of the Bar.
  pub fn label<F>(mut self, label: F) -> Self
  where
    F: Fn(&T, Point<Pixels>) -> Vec<Text> + 'static, {
    self.label = Some(Box::new(label));
    self
  }

  fn path(&self, bounds: &Bounds<Pixels>) -> (Vec<PaintQuad>, PlotLabel) {
    let origin = bounds.origin;
    let mut graph = vec![];
    let mut labels = vec![];

    for v in &self.data {
      let x_tick = (self.x)(v);
      let y_tick = (self.y1)(v);
      let y0 = (self.y0)(v);

      if let (Some(x_tick), Some(y_tick)) = (x_tick, y_tick) {
        let is_negative = y_tick > y0;
        let (p1, p2) = if is_negative {
          (
            origin_point(px(x_tick), px(y0), origin),
            origin_point(px(x_tick + self.band_width), px(y_tick), origin),
          )
        } else {
          (
            origin_point(px(x_tick), px(y_tick), origin),
            origin_point(px(x_tick + self.band_width), px(y0), origin),
          )
        };

        let color = (self.fill)(v);

        graph.push(fill(Bounds::from_corners(p1, p2), color));

        if let Some(label) = &self.label {
          labels.extend(label(
            v,
            point(
              px(x_tick + self.band_width / 2.),
              if is_negative {
                px(y_tick + TEXT_GAP)
              } else {
                px(y_tick - TEXT_HEIGHT)
              },
            ),
          ));
        }
      }
    }

    (graph, PlotLabel::new(labels))
  }

  /// Paint the Bar.
  pub fn paint(&self, bounds: &Bounds<Pixels>, window: &mut Window, cx: &mut App) {
    let (graph, labels) = self.path(bounds);
    for quad in graph {
      window.paint_quad(quad);
    }
    labels.paint(bounds, window, cx);
  }
}