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use dioxus::prelude::*;
use std::collections::BTreeSet;
use super::primitives::{
compute_min_max, generate_svg_path, get_series_color, ChartContainer, ChartDataPoint,
ChartGrid, ChartLegend, ChartSeries, ChartTooltip, CurveType,
};
/// Grafico a linee vettoriale SVG multi-serie con snodi interattivi e curve bezier continue.
#[allow(clippy::type_complexity)]
#[component]
pub fn LineChart(
data: Vec<ChartDataPoint>,
series: Vec<ChartSeries>,
#[props(default)] curve_type: CurveType,
#[props(default = true)] with_dots: bool,
#[props(default = true)] with_grid: bool,
#[props(default = 2.5)] stroke_width: f64,
#[props(default = true)] connect_nulls: bool,
#[props(default = true)] with_tooltip: bool,
#[props(default = true)] with_legend: bool,
#[props(default = 300)] height: u32,
#[props(default)] class: String,
) -> Element {
let hidden_series = use_signal(BTreeSet::<String>::new);
let mut hover_index = use_signal(|| None::<usize>);
let svg_w = 600.0;
let svg_h = 260.0;
let padding_left = 50.0;
let padding_right = 20.0;
let padding_top = 20.0;
let padding_bottom = 40.0;
let plot_w = svg_w - padding_left - padding_right;
let plot_h = svg_h - padding_top - padding_bottom;
let active_series: Vec<(usize, &ChartSeries)> = series
.iter()
.enumerate()
.filter(|(_, s)| !hidden_series().contains(&s.name))
.collect();
let (min_val, max_val) = compute_min_max(&data, &series);
let range = if (max_val - min_val).abs() < f64::EPSILON {
1.0
} else {
max_val - min_val
};
let n = data.len();
let x_step = if n > 1 {
plot_w / (n - 1) as f64
} else {
plot_w
};
let baseline_y = padding_top + plot_h;
// Segmenti di coordinate per ogni serie
let series_lines: Vec<(usize, String, String, bool, Vec<Vec<(f64, f64)>>)> = active_series
.iter()
.map(|&(orig_idx, s)| {
let color = get_series_color(orig_idx, s.color.as_deref());
let is_dashed = s.dashed;
let mut segments: Vec<Vec<(f64, f64)>> = Vec::new();
let mut current_segment: Vec<(f64, f64)> = Vec::new();
for (i, pt) in data.iter().enumerate() {
let cx = padding_left + i as f64 * x_step;
if let Some(v) = pt.get(&s.name) {
let cy = padding_top + plot_h - ((v - min_val) / range) * plot_h;
current_segment.push((cx, cy));
} else if !connect_nulls && !current_segment.is_empty() {
segments.push(std::mem::take(&mut current_segment));
}
}
if !current_segment.is_empty() {
segments.push(current_segment);
}
(orig_idx, s.name.clone(), color, is_dashed, segments)
})
.collect();
let current_tooltip_data = hover_index().and_then(|idx| {
if idx >= data.len() {
return None;
}
let pt = &data[idx];
let mut entries = Vec::new();
for &(orig_idx, ref name, ref color, _, _) in &series_lines {
if let Some(v) = pt.get(name) {
let s_label = series[orig_idx].display_label().to_string();
entries.push((s_label, format!("{v:.1}"), color.clone()));
}
}
let cx = padding_left + idx as f64 * x_step;
let cy = padding_top + plot_h / 2.0;
let x_pct = (cx / svg_w) * 100.0;
let y_pct = (cy / svg_h) * 100.0;
let is_right = x_pct > 60.0;
Some((pt.label.clone(), entries, x_pct, y_pct, is_right))
});
rsx! {
div { class: "w-full flex flex-col {class}",
div {
class: "relative w-full",
onmouseleave: move |_| {
hover_index.set(None);
},
onpointerleave: move |_| {
hover_index.set(None);
},
ChartContainer {
view_box: "0 0 {svg_w} {svg_h}",
height: height,
preserve_aspect_ratio: "xMidYMid meet",
onmouseleave: move |_| {
hover_index.set(None);
},
rect {
x: "0",
y: "0",
width: "{svg_w}",
height: "{svg_h}",
fill: "rgba(0, 0, 0, 0.001)",
style: "pointer-events: all;",
onmouseenter: move |_| hover_index.set(None),
}
if with_grid {
ChartGrid {
x: padding_left,
y: padding_top,
width: plot_w,
height: plot_h,
y_ticks: 4,
horizontal: true,
}
}
// Render linee
for (orig_idx, _, color, dashed, segments) in &series_lines {
for (seg_idx, seg) in segments.iter().enumerate() {
{
let path_d = generate_svg_path(seg, curve_type);
rsx! {
path {
key: "line-{orig_idx}-{seg_idx}",
d: "{path_d}",
fill: "none",
stroke: "{color}",
stroke_width: "{stroke_width}",
stroke_linecap: "round",
stroke_linejoin: "round",
stroke_dasharray: if *dashed { "6 4" } else { "none" },
style: "filter: drop-shadow(0 0 6px {color}88);",
pointer_events: "none",
}
}
}
}
}
// Render dots
if with_dots {
for (orig_idx, _, color, _, segments) in &series_lines {
for seg in segments {
for (pt_idx, (cx, cy)) in seg.iter().enumerate() {
{
let is_hovered = hover_index() == Some(pt_idx);
rsx! {
circle {
key: "dot-{orig_idx}-{pt_idx}",
cx: "{cx}",
cy: "{cy}",
r: if is_hovered { "5.5" } else { "3.5" },
fill: "#09090b",
stroke: if is_hovered { "#ffffff" } else { "{color}" },
stroke_width: if is_hovered { "2.5" } else { "2" },
class: "transition-all duration-150",
pointer_events: "none",
}
}
}
}
}
}
}
// Linea verticale cursore hover
if let Some(idx) = hover_index() {
{
let cx = padding_left + idx as f64 * x_step;
rsx! {
line {
x1: "{cx}",
y1: "{padding_top}",
x2: "{cx}",
y2: "{baseline_y}",
stroke: "rgba(255, 255, 255, 0.25)",
stroke_width: "1.5",
stroke_dasharray: "3 3",
pointer_events: "none",
}
}
}
}
// Etichette asse X
for (i, pt) in data.iter().enumerate() {
{
let cx = padding_left + i as f64 * x_step;
rsx! {
text {
key: "lbl-{i}",
x: "{cx}",
y: "{baseline_y + 20.0}",
text_anchor: "middle",
fill: "rgba(255, 255, 255, 0.45)",
font_size: "11",
font_family: "monospace",
pointer_events: "none",
"{pt.label}"
}
}
}
}
// Hover zone contigue in coordinate SVG native (copertura totale senza gap)
for i in 0..n {
{
let (zone_x, zone_w) = if n <= 1 {
(0.0, svg_w)
} else if i == 0 {
(0.0, padding_left + x_step / 2.0)
} else if i == n - 1 {
let zx = padding_left + (i as f64 - 0.5) * x_step;
(zx, (svg_w - zx).max(1.0))
} else {
(padding_left + (i as f64 - 0.5) * x_step, x_step)
};
rsx! {
rect {
key: "hover-zone-{i}",
x: "{zone_x}",
y: "0",
width: "{zone_w}",
height: "{svg_h}",
fill: "rgba(0, 0, 0, 0.001)",
style: "pointer-events: all;",
class: "cursor-pointer",
onmouseenter: move |_| hover_index.set(Some(i)),
onmouseleave: move |_| hover_index.set(None),
onpointerleave: move |_| hover_index.set(None),
}
}
}
}
}
if with_tooltip {
if let Some((title, entries, x_pct, y_pct, align_r)) = current_tooltip_data {
ChartTooltip {
title: title,
entries: entries,
x_percent: x_pct,
y_percent: y_pct,
align_right: align_r,
visible: true,
}
}
}
}
if with_legend {
ChartLegend {
series: series.clone(),
hidden_series: hidden_series,
}
}
}
}
}