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Merged
imsudiproy merged 2 commits into from
Aug 12, 2026
Merged

Improve TUI #11

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55e2d02
update the tui
imsudiproy Aug 12, 2026
0ecbf97
Render zero-valued CPU and memory metrics as gauges
imsudiproy Aug 12, 2026
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2 changes: 1 addition & 1 deletion Cargo.lock
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2 changes: 1 addition & 1 deletion Cargo.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
[package]
name = "uniproc"
version = "0.1.0"
version = "0.1.1"
edition = "2024"

[dependencies]
Expand Down
268 changes: 194 additions & 74 deletions src/output/tui.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,16 +10,27 @@ use crossterm::{
use ratatui::{
Terminal,
backend::CrosstermBackend,
layout::{Alignment, Constraint, Direction, Layout, Rect},
layout::{Alignment, Constraint, Direction, Layout, Margin, Rect},
style::{Color, Modifier, Style},
symbols,
text::{Line, Span},
widgets::{Axis, Block, Borders, Chart, Dataset, Gauge, GraphType, Paragraph, Sparkline},
widgets::{
Axis, Block, BorderType, Borders, Chart, Dataset, Gauge, GraphType, Paragraph, Sparkline,
},
};
use std::io::{self, Stdout};
use std::time::{Duration, Instant};

const HISTORY_LIMIT: usize = 180;
const SURFACE: Color = Color::Rgb(10, 14, 20);
const PANEL: Color = Color::Rgb(16, 23, 34);
const BORDER: Color = Color::Rgb(53, 65, 83);
const TEXT: Color = Color::Rgb(222, 229, 237);
const MUTED: Color = Color::Rgb(132, 145, 164);
const CPU: Color = Color::Rgb(73, 190, 255);
const MEMORY: Color = Color::Rgb(198, 132, 255);
const DISK: Color = Color::Rgb(86, 211, 137);
const NETWORK: Color = Color::Rgb(255, 191, 87);

pub fn run(monitor: Monitor) -> Result<Vec<ProcessInfo>, String> {
enable_raw_mode().map_err(|e| format!("cannot enable terminal raw mode: {e}"))?;
Expand Down Expand Up @@ -130,43 +141,29 @@ fn draw(
status: &str,
) {
let latest = samples.last();
let title = latest
.map(|s| format!(" {} · PID {} ", s.name, s.pid))
.unwrap_or_else(|| " UniProc · waiting for first sample ".into());
let header = Paragraph::new(Line::from(vec![
Span::styled(
title,
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
),
Span::raw(" "),
Span::styled(
status,
Style::default()
.fg(if paused { Color::Yellow } else { Color::Green })
.add_modifier(Modifier::BOLD),
),
]))
.block(
Block::default()
.borders(Borders::ALL)
.title("UNIPROC MONITOR"),
);
frame.render_widget(Block::default().style(Style::default().bg(SURFACE)), area);

let rows = Layout::default()
.direction(Direction::Vertical)
.constraints([
Constraint::Length(3),
Constraint::Length(5),
Constraint::Length(7),
Constraint::Min(10),
Constraint::Length(3),
Constraint::Length(4),
])
.margin(1)
.split(area);
frame.render_widget(header, rows[0]);

render_header(frame, rows[0], latest, samples.len(), paused, status);

let cards = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)])
.constraints([
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
])
.split(rows[1]);
let cpu = latest.map_or(0.0, |s| s.cpu_percent);
let memory = latest.map_or(0, |s| s.memory_bytes);
Expand All @@ -175,28 +172,51 @@ fn draw(
.map_or(0.0, |sample| {
sample.memory_bytes as f32 / sample.system_memory_bytes as f32
});
frame.render_widget(
metric_gauge(
"CPU",
cpu.min(100.0) / 100.0,
format!("{cpu:.1}%"),
Color::Cyan,
),
let disk_read = latest.map_or(0, |s| s.disk_read_bytes);
let disk_written = latest.map_or(0, |s| s.disk_written_bytes);
let network_received = latest.map_or(0, |s| s.network_received_bytes);
let network_transmitted = latest.map_or(0, |s| s.network_transmitted_bytes);

render_metric_card(
frame,
cards[0],
"CPU",
format!("{cpu:.1}%"),
"processor load",
Some(cpu.min(100.0) / 100.0),
CPU,
);
frame.render_widget(
metric_gauge(
"RESIDENT MEMORY",
memory_ratio,
format_bytes(memory),
Color::Magenta,
),
render_metric_card(
frame,
cards[1],
"Memory",
format_bytes(memory),
"resident set",
Some(memory_ratio),
MEMORY,
);
render_metric_card(
frame,
cards[2],
"Disk I/O",
format!("↓ {}", format_bytes(disk_read)),
format!("↑ {}", format_bytes(disk_written)),
None,
DISK,
);
render_metric_card(
frame,
cards[3],
"Network",
format!("↓ {}", format_bytes(network_received)),
format!("↑ {}", format_bytes(network_transmitted)),
None,
NETWORK,
);

let charts = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(65), Constraint::Percentage(35)])
.constraints([Constraint::Percentage(62), Constraint::Percentage(38)])
.split(rows[2]);
render_cpu_chart(frame, charts[0], samples);
let spark: Vec<u64> = samples
Expand All @@ -206,42 +226,136 @@ fn draw(
frame.render_widget(
Sparkline::default()
.block(
Block::default()
.borders(Borders::ALL)
.title("MEMORY HISTORY (MiB)"),
panel_block("Memory History")
.title_bottom(Line::from(" MiB ").style(Style::default().fg(MUTED))),
)
.data(&spark)
.style(Style::default().fg(Color::Magenta)),
.style(Style::default().fg(MEMORY).bg(PANEL)),
charts[1],
);

let footer = latest
.map(|s| {
format!(
"Disk: ↓ {} ↑ {} · System network: ↓ {} ↑ {}",
format_bytes(s.disk_read_bytes),
format_bytes(s.disk_written_bytes),
format_bytes(s.network_received_bytes),
format_bytes(s.network_transmitted_bytes),
)
})
.unwrap_or_else(|| "Collecting process metrics…".into());
let footer = "p / space pause · c clear history · q / esc quit";
frame.render_widget(
Paragraph::new(footer).alignment(Alignment::Center).block(
Block::default()
.borders(Borders::ALL)
.title(" p / space pause · c clear · q / esc quit "),
),
Paragraph::new(footer)
.alignment(Alignment::Center)
.style(Style::default().fg(MUTED).bg(PANEL))
.block(panel_block("Controls")),
rows[3],
);
}

fn metric_gauge(title: &str, ratio: f32, label: String, color: Color) -> Gauge<'_> {
Gauge::default()
.block(Block::default().borders(Borders::ALL).title(title))
.gauge_style(Style::default().fg(color).add_modifier(Modifier::BOLD))
.ratio(ratio.clamp(0.0, 1.0) as f64)
.label(label)
fn render_header(
frame: &mut ratatui::Frame,
area: Rect,
latest: Option<&ProcessInfo>,
sample_count: usize,
paused: bool,
status: &str,
) {
let target = latest
.map(|s| format!("{} · PID {}", s.name, s.pid))
.unwrap_or_else(|| "waiting for first sample".into());
let status_color = if paused { NETWORK } else { DISK };
let lines = vec![
Line::from(vec![
Span::styled(
"UniProc",
Style::default()
.fg(TEXT)
.bg(PANEL)
.add_modifier(Modifier::BOLD),
),
Span::styled(" process monitor", Style::default().fg(MUTED).bg(PANEL)),
]),
Line::from(vec![
Span::styled(target, Style::default().fg(CPU).bg(PANEL)),
Span::styled(
format!(" · {sample_count} samples · "),
Style::default().fg(MUTED).bg(PANEL),
),
Span::styled(
format!(" {status} "),
Style::default()
.fg(status_color)
.bg(PANEL)
.add_modifier(Modifier::BOLD),
),
]),
];
frame.render_widget(
Paragraph::new(lines)
.block(panel_block("Dashboard"))
.style(Style::default().bg(PANEL)),
area,
);
}

fn render_metric_card(
frame: &mut ratatui::Frame,
area: Rect,
title: &'static str,
value: String,
subtitle: impl Into<String>,
gauge_ratio: Option<f32>,
color: Color,
) {
let block = panel_block(title);
let inner = block.inner(area).inner(Margin {
vertical: 0,
horizontal: 1,
});
frame.render_widget(block, area);

let rows = Layout::default()
.direction(Direction::Vertical)
.constraints([
Constraint::Length(2),
Constraint::Length(2),
Constraint::Length(1),
])
.split(inner);

frame.render_widget(
Paragraph::new(Line::from(value))
.style(
Style::default()
.fg(TEXT)
.bg(PANEL)
.add_modifier(Modifier::BOLD),
)
.alignment(Alignment::Left),
rows[0],
);
frame.render_widget(
Paragraph::new(Line::from(subtitle.into())).style(Style::default().fg(MUTED).bg(PANEL)),
rows[1],
);
if let Some(ratio) = gauge_ratio {
frame.render_widget(
Gauge::default()
.gauge_style(Style::default().fg(color).bg(Color::Rgb(31, 41, 55)))
.ratio(ratio.clamp(0.0, 1.0) as f64)
.label(""),
rows[2],
);
} else {
frame.render_widget(
Sparkline::default()
.data(&[1])
.max(1)
.style(Style::default().fg(color).bg(PANEL)),
rows[2],
);
}
}

fn panel_block(title: &'static str) -> Block<'static> {
Block::default()
.borders(Borders::ALL)
.border_type(BorderType::Rounded)
.border_style(Style::default().fg(BORDER))
.title(Line::from(format!(" {title} ")).style(Style::default().fg(MUTED).bg(PANEL)))
.style(Style::default().fg(TEXT).bg(PANEL))
}

fn render_cpu_chart(frame: &mut ratatui::Frame, area: Rect, samples: &[ProcessInfo]) {
Expand All @@ -260,19 +374,25 @@ fn render_cpu_chart(frame: &mut ratatui::Frame, area: Rect, samples: &[ProcessIn
.name("CPU %")
.marker(symbols::Marker::Braille)
.graph_type(GraphType::Line)
.style(Style::default().fg(Color::Cyan))
.style(Style::default().fg(CPU))
.data(&data);
let chart = Chart::new(vec![dataset])
.block(Block::default().borders(Borders::ALL).title("CPU HISTORY"))
.block(panel_block("CPU History"))
.style(Style::default().bg(PANEL))
.x_axis(
Axis::default()
.bounds([0.0, x_upper])
.labels([Line::from("now")]),
.style(Style::default().fg(MUTED).bg(PANEL))
.labels([Line::from("now").style(Style::default().fg(MUTED))]),
)
.y_axis(
Axis::default()
.bounds([0.0, upper])
.labels([Line::from("0%"), Line::from(format!("{upper:.0}%"))]),
.style(Style::default().fg(MUTED).bg(PANEL))
.labels([
Line::from("0%").style(Style::default().fg(MUTED)),
Line::from(format!("{upper:.0}%")).style(Style::default().fg(MUTED)),
]),
);
frame.render_widget(chart, area);
}
Expand Down
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