gpui: Add data table example (#24373)
Release Notes: - N/A As https://github.com/zed-industries/zed/discussions/24260 I mentioned issue. Make a complex data table example to test the text rendering performance. This example also can be an example to show how to build a large data table. ```bash cargo run -p gpui --example data_table ``` <img width="2004" alt="image" src="https://github.com/user-attachments/assets/653771e5-ef08-4d76-97b9-90ea4b78be59" /> ---- I will try to do some test. For example: With a threshold for the hold number of caches in `FrameCache`, and only when the threshold is greater than a certain number, some caches are released, or when a certain time has passed. I am not sure if this is feasible. This example is added to help us to test.
This commit is contained in:
Jason Lee
GitHub
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commit
ead5a836a1
1 changed files with 479 additions and 0 deletions
479
crates/gpui/examples/data_table.rs
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479
crates/gpui/examples/data_table.rs
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@ -0,0 +1,479 @@
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use std::{
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ops::Range,
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rc::Rc,
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time::{Duration, Instant},
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};
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use gpui::{
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canvas, div, point, prelude::*, px, rgb, size, uniform_list, App, Application, Bounds, Context,
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MouseDownEvent, MouseMoveEvent, MouseUpEvent, Pixels, Point, Render, SharedString,
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UniformListScrollHandle, Window, WindowBounds, WindowOptions,
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};
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const TOTAL_ITEMS: usize = 10000;
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const SCROLLBAR_THUMB_WIDTH: Pixels = px(8.);
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const SCROLLBAR_THUMB_HEIGHT: Pixels = px(100.);
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pub struct Quote {
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name: SharedString,
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symbol: SharedString,
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last_done: f64,
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prev_close: f64,
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open: f64,
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high: f64,
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low: f64,
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timestamp: Instant,
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volume: i64,
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turnover: f64,
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ttm: f64,
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market_cap: f64,
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float_cap: f64,
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shares: f64,
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pb: f64,
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pe: f64,
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eps: f64,
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dividend: f64,
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dividend_yield: f64,
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dividend_per_share: f64,
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dividend_date: SharedString,
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dividend_payment: f64,
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}
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impl Quote {
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pub fn random() -> Self {
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use rand::Rng;
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let mut rng = rand::thread_rng();
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// simulate a base price in a realistic range
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let prev_close = rng.gen_range(100.0..200.0);
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let change = rng.gen_range(-5.0..5.0);
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let last_done = prev_close + change;
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let open = prev_close + rng.gen_range(-3.0..3.0);
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let high = (prev_close + rng.gen_range::<f64, _>(0.0..10.0)).max(open);
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let low = (prev_close - rng.gen_range::<f64, _>(0.0..10.0)).min(open);
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// Randomize the timestamp in the past 24 hours
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let timestamp = Instant::now() - Duration::from_secs(rng.gen_range(0..86400));
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let volume = rng.gen_range(1_000_000..100_000_000);
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let turnover = last_done * volume as f64;
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let symbol = {
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let mut ticker = String::new();
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if rng.gen_bool(0.5) {
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ticker.push_str(&format!(
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"{:03}.{}",
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rng.gen_range(100..1000),
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rng.gen_range(0..10)
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));
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} else {
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ticker.push_str(&format!(
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"{}{}",
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rng.gen_range('A'..='Z'),
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rng.gen_range('A'..='Z')
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));
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}
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ticker.push_str(&format!(".{}", rng.gen_range('A'..='Z')));
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ticker
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};
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let name = format!(
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"{} {} - #{}",
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symbol,
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rng.gen_range(1..100),
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rng.gen_range(10000..100000)
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);
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let ttm = rng.gen_range(0.0..10.0);
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let market_cap = rng.gen_range(1_000_000.0..10_000_000.0);
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let float_cap = market_cap + rng.gen_range(1_000.0..10_000.0);
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let shares = rng.gen_range(100.0..1000.0);
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let pb = market_cap / shares;
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let pe = market_cap / shares;
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let eps = market_cap / shares;
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let dividend = rng.gen_range(0.0..10.0);
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let dividend_yield = rng.gen_range(0.0..10.0);
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let dividend_per_share = rng.gen_range(0.0..10.0);
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let dividend_date = SharedString::new(format!(
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"{}-{}-{}",
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rng.gen_range(2000..2023),
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rng.gen_range(1..12),
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rng.gen_range(1..28)
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));
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let dividend_payment = rng.gen_range(0.0..10.0);
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Self {
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name: name.into(),
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symbol: symbol.into(),
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last_done,
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prev_close,
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open,
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high,
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low,
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timestamp,
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volume,
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turnover,
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pb,
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pe,
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eps,
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ttm,
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market_cap,
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float_cap,
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shares,
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dividend,
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dividend_yield,
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dividend_per_share,
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dividend_date,
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dividend_payment,
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}
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}
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fn change(&self) -> f64 {
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(self.last_done - self.prev_close) / self.prev_close * 100.0
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}
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fn change_color(&self) -> gpui::Hsla {
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if self.change() > 0.0 {
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gpui::green()
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} else {
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gpui::red()
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}
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}
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fn turnover_ratio(&self) -> f64 {
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self.volume as f64 / self.turnover * 100.0
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}
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}
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#[derive(IntoElement)]
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struct TableRow {
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ix: usize,
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quote: Rc<Quote>,
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}
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impl TableRow {
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fn new(ix: usize, quote: Rc<Quote>) -> Self {
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Self { ix, quote }
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}
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fn render_cell(&self, key: &str, width: Pixels, color: gpui::Hsla) -> impl IntoElement {
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div()
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.whitespace_nowrap()
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.truncate()
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.w(width)
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.px_1()
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.child(match key {
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"id" => div().child(format!("{}", self.ix)),
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"symbol" => div().child(self.quote.symbol.clone()),
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"name" => div().child(self.quote.name.clone()),
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"last_done" => div()
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.text_color(color)
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.child(format!("{:.3}", self.quote.last_done)),
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"prev_close" => div()
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.text_color(color)
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.child(format!("{:.3}", self.quote.prev_close)),
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"change" => div()
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.text_color(color)
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.child(format!("{:.2}%", self.quote.change())),
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"timestamp" => div()
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.text_color(color)
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.child(format!("{:?}", self.quote.timestamp.elapsed().as_secs())),
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"open" => div()
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.text_color(color)
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.child(format!("{:.2}", self.quote.open)),
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"low" => div()
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.text_color(color)
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.child(format!("{:.2}", self.quote.low)),
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"high" => div()
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.text_color(color)
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.child(format!("{:.2}", self.quote.high)),
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"ttm" => div()
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.text_color(color)
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.child(format!("{:.2}", self.quote.ttm)),
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"eps" => div()
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.text_color(color)
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.child(format!("{:.2}", self.quote.eps)),
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"market_cap" => {
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div().child(format!("{:.2} M", self.quote.market_cap / 1_000_000.0))
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}
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"float_cap" => div().child(format!("{:.2} M", self.quote.float_cap / 1_000_000.0)),
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"turnover" => div().child(format!("{:.2} M", self.quote.turnover / 1_000_000.0)),
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"volume" => div().child(format!("{:.2} M", self.quote.volume as f64 / 1_000_000.0)),
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"turnover_ratio" => div().child(format!("{:.2}%", self.quote.turnover_ratio())),
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"pe" => div().child(format!("{:.2}", self.quote.pe)),
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"pb" => div().child(format!("{:.2}", self.quote.pb)),
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"shares" => div().child(format!("{:.2}", self.quote.shares)),
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"dividend" => div().child(format!("{:.2}", self.quote.dividend)),
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"yield" => div().child(format!("{:.2}%", self.quote.dividend_yield)),
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"dividend_per_share" => {
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div().child(format!("{:.2}", self.quote.dividend_per_share))
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}
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"dividend_date" => div().child(format!("{}", self.quote.dividend_date)),
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"dividend_payment" => div().child(format!("{:.2}", self.quote.dividend_payment)),
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_ => div().child("--"),
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})
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}
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}
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const FIELDS: [(&str, f32); 24] = [
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("id", 64.),
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("symbol", 64.),
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("name", 180.),
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("last_done", 80.),
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("prev_close", 80.),
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("open", 80.),
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("low", 80.),
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("high", 80.),
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("ttm", 50.),
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("market_cap", 96.),
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("float_cap", 96.),
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("turnover", 120.),
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("volume", 100.),
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("turnover_ratio", 96.),
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("pe", 64.),
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("pb", 64.),
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("eps", 64.),
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("shares", 96.),
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("dividend", 64.),
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("yield", 64.),
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("dividend_per_share", 64.),
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("dividend_date", 96.),
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("dividend_payment", 64.),
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("timestamp", 120.),
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];
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impl RenderOnce for TableRow {
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fn render(self, _window: &mut Window, _cx: &mut App) -> impl IntoElement {
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let color = self.quote.change_color();
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div()
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.flex()
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.flex_row()
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.border_b_1()
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.border_color(rgb(0xE0E0E0))
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.bg(if self.ix % 2 == 0 {
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rgb(0xFFFFFF)
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} else {
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rgb(0xFAFAFA)
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})
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.py_0p5()
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.px_2()
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.children(FIELDS.map(|(key, width)| self.render_cell(key, px(width), color)))
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}
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}
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struct DataTable {
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/// Use `Rc` to share the same quote data across multiple items, avoid cloning.
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quotes: Vec<Rc<Quote>>,
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visible_range: Range<usize>,
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scroll_handle: UniformListScrollHandle,
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/// The position in thumb bounds when dragging start mouse down.
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drag_position: Option<Point<Pixels>>,
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}
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impl DataTable {
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fn new() -> Self {
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Self {
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quotes: Vec::new(),
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visible_range: 0..0,
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scroll_handle: UniformListScrollHandle::new(),
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drag_position: None,
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}
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}
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fn generate(&mut self) {
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self.quotes = (0..TOTAL_ITEMS).map(|_| Rc::new(Quote::random())).collect();
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}
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fn table_bounds(&self) -> Bounds<Pixels> {
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self.scroll_handle.0.borrow().base_handle.bounds()
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}
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fn scroll_top(&self) -> Pixels {
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self.scroll_handle.0.borrow().base_handle.offset().y
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}
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fn scroll_height(&self) -> Pixels {
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self.scroll_handle
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.0
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.borrow()
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.last_item_size
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.unwrap_or_default()
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.contents
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.height
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}
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fn render_scrollbar(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
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let scroll_height = self.scroll_height();
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let table_bounds = self.table_bounds();
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let table_height = table_bounds.size.height;
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if table_height == px(0.) {
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return div().id("scrollbar");
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}
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let percentage = -self.scroll_top() / scroll_height;
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let offset_top = (table_height * percentage).clamp(
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px(4.),
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(table_height - SCROLLBAR_THUMB_HEIGHT - px(4.)).max(px(4.)),
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);
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let entity = cx.entity();
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let scroll_handle = self.scroll_handle.0.borrow().base_handle.clone();
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div()
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.id("scrollbar")
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.absolute()
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.top(offset_top)
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.right_1()
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.h(SCROLLBAR_THUMB_HEIGHT)
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.w(SCROLLBAR_THUMB_WIDTH)
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.bg(rgb(0xC0C0C0))
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.hover(|this| this.bg(rgb(0xA0A0A0)))
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.rounded_lg()
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.child(
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canvas(
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|_, _, _| (),
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move |thumb_bounds, _, window, _| {
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window.on_mouse_event({
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let entity = entity.clone();
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move |ev: &MouseDownEvent, _, _, cx| {
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if !thumb_bounds.contains(&ev.position) {
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return;
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}
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entity.update(cx, |this, _| {
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this.drag_position = Some(
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ev.position - thumb_bounds.origin - table_bounds.origin,
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);
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})
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}
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});
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window.on_mouse_event({
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let entity = entity.clone();
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move |_: &MouseUpEvent, _, _, cx| {
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entity.update(cx, |this, _| {
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this.drag_position = None;
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})
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}
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});
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window.on_mouse_event(move |ev: &MouseMoveEvent, _, _, cx| {
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if !ev.dragging() {
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return;
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}
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let Some(drag_pos) = entity.read(cx).drag_position else {
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return;
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};
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let inside_offset = drag_pos.y;
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let percentage = ((ev.position.y - table_bounds.origin.y
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+ inside_offset)
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/ (table_bounds.size.height))
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.clamp(0., 1.);
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let offset_y = ((scroll_height - table_bounds.size.height)
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* percentage)
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.clamp(px(0.), scroll_height - SCROLLBAR_THUMB_HEIGHT);
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scroll_handle.set_offset(point(px(0.), -offset_y));
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cx.notify(entity.entity_id());
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})
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},
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)
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.size_full(),
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)
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}
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}
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impl Render for DataTable {
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fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
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let entity = cx.entity();
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div()
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.font_family(".SystemUIFont")
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.bg(gpui::white())
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.text_sm()
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.size_full()
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.p_4()
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.gap_2()
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.flex()
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.flex_col()
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.child(format!(
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"Total {} items, visible range: {:?}",
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self.quotes.len(),
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self.visible_range
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))
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.child(
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div()
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.flex()
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.flex_col()
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.flex_1()
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.overflow_hidden()
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.border_1()
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.border_color(rgb(0xE0E0E0))
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.rounded_md()
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.child(
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div()
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.flex()
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.flex_row()
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.w_full()
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.overflow_hidden()
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.border_b_1()
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.border_color(rgb(0xE0E0E0))
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.text_color(rgb(0x555555))
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.bg(rgb(0xF0F0F0))
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.py_1()
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.px_2()
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.text_xs()
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.children(FIELDS.map(|(key, width)| {
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div()
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.whitespace_nowrap()
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.flex_shrink_0()
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.truncate()
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.px_1()
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.w(px(width))
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.child(key.replace("_", " ").to_uppercase())
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})),
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)
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.child(
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div()
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.relative()
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.size_full()
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.child(
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uniform_list(entity, "items", self.quotes.len(), {
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move |this, range, _, _| {
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this.visible_range = range.clone();
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let mut items = Vec::with_capacity(range.end - range.start);
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for i in range {
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if let Some(quote) = this.quotes.get(i) {
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items.push(TableRow::new(i, quote.clone()));
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}
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}
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items
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}
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})
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.size_full()
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.track_scroll(self.scroll_handle.clone()),
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)
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.child(self.render_scrollbar(window, cx)),
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),
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)
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}
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}
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fn main() {
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Application::new().run(|cx: &mut App| {
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cx.open_window(
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WindowOptions {
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focus: true,
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window_bounds: Some(WindowBounds::Windowed(Bounds::centered(
|
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None,
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size(px(1280.0), px(1000.0)),
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cx,
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))),
|
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..Default::default()
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||||
},
|
||||
|_, cx| {
|
||||
cx.new(|_| {
|
||||
let mut table = DataTable::new();
|
||||
table.generate();
|
||||
table
|
||||
})
|
||||
},
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
cx.activate(true);
|
||||
});
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue