guise-ui 1.5.2

A component library for gpui, Zed's GPU-accelerated UI framework: a themed palette, sizing tokens, 130+ composable components, a reactive state layer, and an in-app Safari-style inspector.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212

//! `AreaChart` — filled line series, stacked by default.
//!
//! Stacking accumulates the layers (`stack_layers`), so each band shows its
//! own contribution and the top edge is the total. `.overlaid()` draws the
//! raw series over each other instead.
//!
//! ```ignore
//! use guise::chart::AreaChart;
//!
//! AreaChart::series("Free", [40.0, 42.0, 45.0])
//!     .add_series("Pro", [12.0, 15.0, 21.0])
//!     .axis()
//!     .labels(["May", "Jun", "Jul"])
//! ```

use gpui::prelude::*;
use gpui::{
  canvas, div, fill, point, px, size, App, Bounds, Hsla, IntoElement, SharedString, Window,
};

use crate::style::ColorValue;
use crate::theme::theme;

use super::axis::nice_ticks;
use super::frame::{legend_row, x_label_row, y_axis_column};
use super::{
  min_max, normalize_between, paint_band, paint_polyline_ys, series_color, stack_layers,
};
use crate::devtools::Probed;

/// A stacked (or overlaid) area chart over one or more series.
#[derive(IntoElement)]
pub struct AreaChart {
  series: Vec<(Option<SharedString>, Vec<f32>)>,
  colors: Vec<ColorValue>,
  stacked: bool,
  axis: bool,
  labels: Vec<SharedString>,
  stroke: f32,
  width: Option<f32>,
  height: f32,
}

impl AreaChart {
  pub fn new(values: impl IntoIterator<Item = f32>) -> Self {
    AreaChart {
      series: vec![(None, values.into_iter().collect())],
      colors: Vec::new(),
      stacked: true,
      axis: false,
      labels: Vec::new(),
      stroke: 1.5,
      width: None,
      height: 140.0,
    }
  }

  /// Start a named multi-series chart; extend with [`add_series`](Self::add_series).
  pub fn series(label: impl Into<SharedString>, values: impl IntoIterator<Item = f32>) -> Self {
    let mut chart = AreaChart::new(values);
    chart.series[0].0 = Some(label.into());
    chart
  }

  /// Add another named series (stacked on top by default).
  pub fn add_series(
    mut self,
    label: impl Into<SharedString>,
    values: impl IntoIterator<Item = f32>,
  ) -> Self {
    self
      .series
      .push((Some(label.into()), values.into_iter().collect()));
    self
  }

  /// Draw the raw series over each other instead of stacking.
  pub fn overlaid(mut self) -> Self {
    self.stacked = false;
    self
  }

  /// Per-series colors, cycled when shorter than the series list.
  pub fn colors(mut self, colors: impl IntoIterator<Item = impl Into<ColorValue>>) -> Self {
    self.colors = colors.into_iter().map(Into::into).collect();
    self
  }

  /// Show a y-axis with nice-number ticks and aligned gridlines.
  pub fn axis(mut self) -> Self {
    self.axis = true;
    self
  }

  /// Category labels under the plot, one per data point.
  pub fn labels(mut self, labels: impl IntoIterator<Item = impl Into<SharedString>>) -> Self {
    self.labels = labels.into_iter().map(Into::into).collect();
    self
  }

  /// Fixed width in px. Defaults to the parent's full width.
  pub fn width(mut self, width: f32) -> Self {
    self.width = Some(width);
    self
  }

  /// Plot height in px (default 140), excluding labels and legend.
  pub fn height(mut self, height: f32) -> Self {
    self.height = height;
    self
  }
}

impl RenderOnce for AreaChart {
  fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
    let t = theme(cx);
    let colors: Vec<Hsla> = (0..self.series.len())
      .map(|i| series_color(t, &self.colors, i))
      .collect();
    let grid = t.border().alpha(0.5);
    let stroke = self.stroke;
    let stacked = self.stacked;

    let raw: Vec<Vec<f32>> = self.series.iter().map(|(_, v)| v.clone()).collect();
    let layers = if stacked {
      stack_layers(&raw)
    } else {
      raw.clone()
    };

    // Scale: stacked charts run 0..=top-layer max; overlaid use the
    // combined data range.
    let flat: Vec<f32> = layers.iter().flatten().copied().collect();
    let (lo, hi) = if stacked {
      (0.0, min_max(&flat).map(|(_, hi)| hi).unwrap_or(1.0))
    } else {
      min_max(&flat).unwrap_or((0.0, 1.0))
    };
    let ticks = nice_ticks(lo, hi, 4);
    let (lo, hi) = (*ticks.first().unwrap(), *ticks.last().unwrap());
    let gridline_count = ticks.len().max(2);

    let paint_colors = colors.clone();
    let plot = canvas(
      |_, _, _| (),
      move |bounds, _, window, _cx| {
        let w = f32::from(bounds.size.width);
        let h = f32::from(bounds.size.height);
        if w <= 0.0 || h <= 0.0 {
          return;
        }
        for i in 0..gridline_count {
          let y = (h - 1.0) * (i as f32 / (gridline_count - 1) as f32);
          window.paint_quad(fill(
            Bounds::new(bounds.origin + point(px(0.0), px(y)), size(px(w), px(1.0))),
            grid,
          ));
        }
        let zero = normalize_between(&[0.0; 2], lo, hi)[0];
        let mut below: Option<Vec<f32>> = None;
        for (i, layer) in layers.iter().enumerate() {
          let ys = normalize_between(layer, lo, hi);
          let color = paint_colors[i];
          let band = Hsla { a: 0.25, ..color };
          if stacked {
            let lower = below.clone().unwrap_or_else(|| vec![zero; ys.len()]);
            paint_band(window, bounds, &ys, &lower, band);
            below = Some(ys.clone());
          }
          paint_polyline_ys(
            window,
            bounds,
            &ys,
            stroke,
            color,
            (!stacked).then_some(band),
          );
        }
      },
    )
    .w_full()
    .h(px(self.height));

    let mut body = div().flex().flex_row().w_full();
    if self.axis {
      body = body.child(y_axis_column(t, &ticks, self.height));
    }
    let mut plot_column = div().flex_1().flex().flex_col().gap(px(4.0)).child(plot);
    if !self.labels.is_empty() {
      plot_column = plot_column.child(x_label_row(t, &self.labels));
    }
    body = body.child(plot_column);

    let legend: Vec<(SharedString, Hsla)> = self
      .series
      .iter()
      .enumerate()
      .filter_map(|(i, (label, _))| label.clone().map(|l| (l, colors[i])))
      .collect();

    let mut root = div().flex().flex_col();
    root = match self.width {
      Some(w) => root.w(px(w)),
      None => root.w_full(),
    };
    root = root.child(body);
    if !legend.is_empty() {
      root = root.child(legend_row(t, &legend));
    }
    root.probe("AreaChart")
  }
}