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use crate::hooks::use_container_size;
use leptos::prelude::*;
use lodviz_core::algorithms::beeswarm::beeswarm_layout;
/// Strip chart (dot plot) component
pub use lodviz_core::algorithms::beeswarm::StripLayout;
use lodviz_core::core::data::StripGroup;
use lodviz_core::core::scale::{LinearScale, Scale};
use lodviz_core::core::theme::{ChartConfig, ChartTheme};
/// StripChart: categorical groups on the Y axis, individual values scattered on the X axis.
#[component]
pub fn StripChart(
/// Groups of values to display
data: Signal<Vec<StripGroup>>,
/// How to distribute points within a band
#[prop(default = StripLayout::Jitter)]
layout: StripLayout,
/// Circle radius for each data point in SVG units
#[prop(default = 4.0)]
point_radius: f64,
/// Chart configuration
#[prop(default = Signal::derive(|| ChartConfig::default()), into)]
config: Signal<ChartConfig>,
/// Fixed width override
#[prop(optional)]
width: Option<u32>,
/// Fixed height override
#[prop(optional)]
height: Option<u32>,
/// X axis label
#[prop(optional, into)]
x_label: Option<String>,
) -> impl IntoView {
let ctx_theme = use_context::<Signal<ChartTheme>>();
let theme = Memo::new(move |_| {
config
.get()
.theme
.unwrap_or_else(|| ctx_theme.map(|s| s.get()).unwrap_or_default())
});
let (container_width, container_height, container_ref) = use_container_size();
let chart_width = Memo::new(move |_| {
let m = container_width.get();
if m > 0.0 {
return m as u32;
}
config.get().width.or(width).unwrap_or(600)
});
let chart_height = Memo::new(move |_| {
let m = container_height.get();
if m > 0.0 {
return m as u32;
}
config.get().height.or(height).unwrap_or(400)
});
let final_title = Memo::new(move |_| config.get().title);
let margin_top = 30.0_f64;
let margin_bottom = 50.0_f64;
let margin_left = 90.0_f64;
let margin_right = 20.0_f64;
let inner_width =
Memo::new(move |_| (chart_width.get() as f64 - margin_left - margin_right).max(10.0));
let inner_height =
Memo::new(move |_| (chart_height.get() as f64 - margin_top - margin_bottom).max(10.0));
// X domain: union of all values
let x_domain = Memo::new(move |_| {
let groups = data.get();
let mut xmin = f64::INFINITY;
let mut xmax = f64::NEG_INFINITY;
for g in &groups {
for &v in &g.values {
if v < xmin {
xmin = v;
}
if v > xmax {
xmax = v;
}
}
}
if xmin >= xmax {
xmin -= 1.0;
xmax += 1.0;
}
let pad = (xmax - xmin) * 0.05;
(xmin - pad, xmax + pad)
});
// Hover state for tooltip
let (hover_group, set_hover_group) = signal(None::<String>);
let (hover_value, set_hover_value) = signal(None::<f64>);
let (hover_x, set_hover_x) = signal(0.0_f64);
let (hover_y, set_hover_y) = signal(0.0_f64);
let clip_id = format!("strip-clip-{}", uuid::Uuid::new_v4().simple());
let a11y_title_id = format!("chart-title-{}", uuid::Uuid::new_v4().as_simple());
let a11y_desc_id = format!("chart-desc-{}", uuid::Uuid::new_v4().as_simple());
let a11y_labelledby = format!("{} {}", a11y_title_id, a11y_desc_id);
view! {
<div
class="strip-chart"
style=move || {
format!(
"width: 100%; height: 100%; display: flex; flex-direction: column; background-color: {};",
theme.get().background_color,
)
}
>
{move || {
final_title
.get()
.map(|t| {
let th = theme.get();
view! {
<h3 style=format!(
"text-align: center; margin: 0; padding-top: {}px; padding-bottom: {}px; font-size: {}px; font-family: {}; color: {}; font-weight: {};",
th.title_padding_top,
th.title_padding_bottom,
th.title_font_size,
th.font_family,
th.text_color,
th.title_font_weight,
)>{t}</h3>
}
})
}}
<div node_ref=container_ref style="flex: 1; position: relative; min-height: 0;">
<svg
role="img"
aria-labelledby=a11y_labelledby
viewBox=move || format!("0 0 {} {}", chart_width.get(), chart_height.get())
style="width: 100%; height: 100%; display: block;"
>
<title id=a11y_title_id>
{move || final_title.get().unwrap_or("Strip Chart".to_string())}
</title>
<desc id=a11y_desc_id>
"Strip chart showing individual data points per group"
</desc>
<g transform=move || format!("translate({margin_left}, {margin_top})")>
<defs>
<clipPath id=clip_id.clone()>
<rect
x="0"
y="0"
width=move || inner_width.get()
height=move || inner_height.get()
/>
</clipPath>
</defs>
// Data points per group
{move || {
let groups = data.get();
if groups.is_empty() {
return vec![].into_iter().collect_view();
}
let n_groups = groups.len();
let iw = inner_width.get();
let ih = inner_height.get();
let band_h = ih / n_groups as f64;
let (xmin, xmax) = x_domain.get();
let x_scale = LinearScale::new((xmin, xmax), (0.0, iw));
let th = theme.get();
groups
.iter()
.enumerate()
.map(|(gi, group)| {
let band_center_y = gi as f64 * band_h + band_h / 2.0;
let offsets = beeswarm_layout(
&group.values,
layout,
point_radius,
band_h * 0.85,
);
let color = th.palette[gi % th.palette.len()].clone();
let gname = group.name.clone();
let circles = group
.values
.iter()
.zip(offsets.iter())
.map(|(&val, &off)| {
let cx = x_scale.map(val);
let cy = band_center_y + off;
let color_c = color.clone();
let gname_c = gname.clone();
view! {
<circle
cx=format!("{cx:.2}")
cy=format!("{cy:.2}")
r=point_radius
fill=color_c.clone()
opacity=th.point_opacity
style="cursor: default;"
on:mousemove=move |ev| {
set_hover_group.set(Some(gname_c.clone()));
set_hover_value.set(Some(val));
set_hover_x.set(ev.offset_x() as f64 - margin_left);
set_hover_y.set(ev.offset_y() as f64 - margin_top);
}
on:mouseleave=move |_| {
set_hover_group.set(None);
set_hover_value.set(None);
}
/>
}
})
.collect_view();
let label = group.name.clone();
// Group label on Y axis
view! {
<g clip-path=format!("url(#{})", clip_id)>{circles}</g>
<text
x="-8"
y=format!("{:.2}", band_center_y + th.axis_font_size * 0.35)
text-anchor="end"
font-size=th.axis_font_size
fill=color.clone()
>
{label}
</text>
}
})
.collect_view()
}}
// X axis ticks
{move || {
let (xmin, xmax) = x_domain.get();
let iw = inner_width.get();
let ih = inner_height.get();
let th = theme.get();
let x_scale = LinearScale::new((xmin, xmax), (0.0, iw));
let n_ticks = (iw / 80.0).max(2.0) as usize;
let ticks: Vec<f64> = (0..=n_ticks)
.map(|i| xmin + (xmax - xmin) * i as f64 / n_ticks as f64)
.collect();
ticks
.iter()
.map(|&v| {
let tx = x_scale.map(v);
view! {
<g>
<line
x1=format!("{tx:.2}")
y1=format!("{ih:.2}")
x2=format!("{tx:.2}")
y2=format!("{:.2}", ih + 5.0)
stroke=th.axis_color.clone()
stroke-width="1"
/>
<text
x=format!("{tx:.2}")
y=format!("{:.2}", ih + 16.0)
text-anchor="middle"
font-size=th.axis_font_size
fill=th.text_color.clone()
>
{format!("{v:.1}")}
</text>
</g>
}
})
.collect_view()
}}
// X axis baseline
{move || {
let iw = inner_width.get();
let ih = inner_height.get();
let th = theme.get();
view! {
<line
x1="0"
y1=format!("{ih:.2}")
x2=format!("{iw:.2}")
y2=format!("{ih:.2}")
stroke=th.axis_color.clone()
stroke-width="1"
/>
}
}}
// X label
{x_label
.as_ref()
.map(|label| {
let label = label.clone();
move || {
let iw = inner_width.get();
let ih = inner_height.get();
let th = theme.get();
view! {
<text
x=format!("{:.2}", iw / 2.0)
y=format!("{:.2}", ih + 38.0)
text-anchor="middle"
font-size=th.font_size
fill=th.text_color.clone()
>
{label.clone()}
</text>
}
}
})}
// Tooltip
{move || {
let grp = hover_group.get()?;
let val = hover_value.get()?;
let mx = hover_x.get();
let my = hover_y.get();
let iw = inner_width.get();
let ih = inner_height.get();
let label = format!("{grp}: {val:.3}");
let bw = 12.0 + label.len() as f64 * 6.5;
let bh = 28.0;
let bx = if mx + bw + 12.0 > iw { mx - bw - 12.0 } else { mx + 12.0 };
let by = if my + bh + 8.0 > ih { my - bh - 8.0 } else { my + 8.0 };
Some(
view! {
<g style="pointer-events: none;">
<rect
x=format!("{bx:.2}")
y=format!("{by:.2}")
width=format!("{bw:.2}")
height=bh
rx="4"
fill="rgba(0,0,0,0.82)"
/>
<text
x=format!("{:.2}", bx + 8.0)
y=format!("{:.2}", by + 18.0)
font-size="11"
fill="white"
font-family="monospace"
>
{label}
</text>
</g>
},
)
}}
</g>
</svg>
</div>
</div>
}
}