use mtk::colors::Color;
use mtk::style::{AlignItems, JustifyContent, Size, Style, TextStyle};
use mtk::text_property::FontWeight;
use mtk::ui::adapt;
use mtk::ui::style::ViewStyleExt;
use mtk::ui::widgets::{badge, button, column, input_text, row, text, virtual_list};
use mtk::windowing::{Window, WindowAttributes};
use mtk::{Edges, clr};
use std::rc::Rc;
#[derive(Clone, Debug, PartialEq)]
struct LogRecord {
id: usize,
timestamp: String,
service: &'static str,
level: &'static str,
message: String,
latency_ms: u32,
}
#[derive(Clone, Copy, PartialEq, Eq)]
enum FilterLevel {
All,
Errors,
Warnings,
Info,
}
struct AppState {
all_logs: Vec<LogRecord>,
filtered_logs: Rc<Vec<LogRecord>>,
search_query: String,
filter_level: FilterLevel,
}
#[derive(Clone)]
enum AppMsg {
SetSearch(String),
SetFilter(FilterLevel),
}
fn generate_logs(count: usize) -> Vec<LogRecord> {
let services = [
"auth-service",
"payment-gw",
"indexer-v2",
"db-cluster",
"ingress-router",
"cache-redis",
];
let levels = ["INFO", "WARN", "ERROR", "DEBUG"];
let messages = [
"Connection pool established with read replica",
"TLS handshake succeeded for upstream peer",
"Cache miss fallback to primary key-value store",
"High latency threshold exceeded on endpoint /v1/checkout",
"Token verification failed: expired signature payload",
"Database query timeout after 3000ms on index scan",
"Background garbage collection completed successfully",
"Rate limit bucket saturated for client IP 192.168.1.42",
];
let mut logs = Vec::with_capacity(count);
for i in 0..count {
let sec = (i % 60) as u32;
let min = ((i / 60) % 60) as u32;
let hour = ((i / 3600) % 24) as u32;
let ms = (i * 37) % 1000;
let svc = services[i % services.len()];
let level = match (i * 7) % 10 {
0..=5 => levels[0], 6..=7 => levels[1], 8 => levels[2], _ => levels[3], };
let msg = messages[(i * 3 + (i % 5)) % messages.len()];
let latency = ((i * 13) % 240 + 5) as u32;
logs.push(LogRecord {
id: i + 1,
timestamp: format!("{:02}:{:02}:{:02}.{:03}", hour, min, sec, ms),
service: svc,
level,
message: format!("{msg} [req_id: #{:06x}]", i * 1337),
latency_ms: latency,
});
}
logs
}
fn apply_filter(logs: &[LogRecord], query: &str, level: FilterLevel) -> Vec<LogRecord> {
let q = query.trim().to_lowercase();
logs.iter()
.filter(|log| {
let matches_level = match level {
FilterLevel::All => true,
FilterLevel::Errors => log.level == "ERROR",
FilterLevel::Warnings => log.level == "WARN",
FilterLevel::Info => log.level == "INFO",
};
if !matches_level {
return false;
}
if q.is_empty() {
return true;
}
log.service.to_lowercase().contains(&q)
|| log.message.to_lowercase().contains(&q)
|| log.level.to_lowercase().contains(&q)
})
.cloned()
.collect()
}
fn update(state: &mut AppState, msg: AppMsg) {
match msg {
AppMsg::SetSearch(q) => {
state.search_query = q;
let filtered = apply_filter(&state.all_logs, &state.search_query, state.filter_level);
state.filtered_logs = Rc::new(filtered);
}
AppMsg::SetFilter(level) => {
state.filter_level = level;
let filtered = apply_filter(&state.all_logs, &state.search_query, state.filter_level);
state.filtered_logs = Rc::new(filtered);
}
}
}
fn search_query_lens(s: &AppState) -> &String {
&s.search_query
}
fn cell_txt(
label: impl Into<String>,
width: u32,
color: Color,
size: f32,
weight: FontWeight,
) -> impl mtk::ui::View<AppState, Message = AppMsg> {
text(label.into()).style(
Style::new().width(Size::Fixed(width)).set_text_style(
TextStyle::new()
.color(color)
.font_size(size)
.font_weight(weight),
),
)
}
fn txt(
label: impl Into<String>,
color: Color,
size: f32,
weight: FontWeight,
) -> impl mtk::ui::View<AppState, Message = AppMsg> {
text(label.into()).style(
Style::new().set_text_style(
TextStyle::new()
.color(color)
.font_size(size)
.font_weight(weight),
),
)
}
fn filter_chip(
label: &str,
level: FilterLevel,
current: FilterLevel,
) -> impl mtk::ui::View<AppState, Message = AppMsg> {
let is_active = level == current;
let bg = if is_active {
clr!(0x2563EBFF)
} else {
clr!(0xF1F5F9FF)
};
let text_clr = if is_active {
clr!(0xFFFFFFFF)
} else {
clr!(0x475569FF)
};
button(label).on_click(AppMsg::SetFilter(level)).style(
Style::new()
.padding_xy(12.0, 6.0)
.corner_radius(6.0)
.bg_color(bg)
.border(
1.0,
if is_active {
clr!(0x1D4ED8FF)
} else {
clr!(0xCBD5E1FF)
},
)
.set_text_style(
TextStyle::new()
.color(text_clr)
.font_size(12.0)
.font_weight(FontWeight::NORMAL),
),
)
}
fn main() {
let total_count = 1_000_000;
println!("Generating {total_count} log entries in memory...");
let all_logs = generate_logs(total_count);
let initial_filtered = all_logs.clone();
let state = AppState {
all_logs,
filtered_logs: Rc::new(initial_filtered),
search_query: String::new(),
filter_level: FilterLevel::All,
};
let window = Window::with(state, update, |state: &AppState| {
let logs_ref = Rc::clone(&state.filtered_logs);
let count = logs_ref.len();
let total = state.all_logs.len();
let header_bar = column((
row((
row((
badge("MTK VIRTUAL LIST").style(
Style::new()
.bg_color(clr!(0x2563EBFF))
.corner_radius(4.0)
.padding_edges(Edges::lr(4.))
.set_text_style(
TextStyle::new()
.color(clr!(0xFFFFFFFF))
.font_weight(FontWeight::BOLD),
),
),
txt(
"High-Performance System Log Streamer",
clr!(0x0F172AFF),
18.0,
FontWeight::BOLD,
),
))
.style(Style::new().gap(12.0).align_items(AlignItems::Center)),
row((txt(
format!("Showing: {count} / {total} entries (1,000,000 rows)"),
clr!(0x2563EBFF),
12.0,
FontWeight::BOLD,
),))
.style(Style::new().align_items(AlignItems::Center)),
))
.style(
Style::new()
.width(Size::Percent(1.0))
.justify_content(JustifyContent::SpaceBetween)
.align_items(AlignItems::Center),
),
row((
adapt(
input_text()
.placeholder("Filter by Service, Level, or Message content...")
.style(
Style::new()
.width(Size::Fixed(360))
.height(Size::Fixed(32))
.padding_xy(10.0, 0.0)
.bg_color(clr!(0xFFFFFFFF))
.corner_radius(6.0)
.border(1.0, clr!(0xCBD5E1FF))
.set_text_style(
TextStyle::new().color(clr!(0x0F172AFF)).font_size(13.0),
),
),
search_query_lens,
AppMsg::SetSearch,
),
row((
filter_chip("All (1,000,000)", FilterLevel::All, state.filter_level),
filter_chip("Errors Only", FilterLevel::Errors, state.filter_level),
filter_chip("Warnings", FilterLevel::Warnings, state.filter_level),
filter_chip("Info", FilterLevel::Info, state.filter_level),
))
.style(Style::new().gap(8.0)),
))
.style(
Style::new()
.width(Size::Percent(1.0))
.gap(16.0)
.align_items(AlignItems::Center),
),
))
.style(
Style::new()
.width(Size::Percent(1.0))
.padding(16.0)
.gap(12.0)
.bg_color(clr!(0xF8FAFCFF))
.border(1.0, clr!(0xE2E8F0FF)),
);
let table_header = row((
cell_txt("ID", 70, clr!(0x475569FF), 12.0, FontWeight::BOLD),
cell_txt("TIME", 110, clr!(0x475569FF), 12.0, FontWeight::BOLD),
cell_txt("LEVEL", 80, clr!(0x475569FF), 12.0, FontWeight::BOLD),
cell_txt("SERVICE", 130, clr!(0x475569FF), 12.0, FontWeight::BOLD),
cell_txt("LATENCY", 80, clr!(0x475569FF), 12.0, FontWeight::BOLD),
cell_txt("MESSAGE", 450, clr!(0x475569FF), 12.0, FontWeight::BOLD),
))
.style(
Style::new()
.width(Size::Percent(1.0))
.height(Size::Fixed(36))
.padding_xy(16.0, 0.0)
.align_items(AlignItems::Center)
.bg_color(clr!(0xF1F5F9FF))
.border(1.0, clr!(0xE2E8F0FF)),
);
let vlist = virtual_list((*logs_ref).clone(), 36.0, |idx, item: &LogRecord| {
let is_even = idx % 2 == 0;
let row_bg = if is_even {
clr!(0xFFFFFFFF)
} else {
clr!(0xF8FAFCFF)
};
let (level_bg, level_fg) = match item.level {
"ERROR" => (clr!(0xFEE2E2FF), clr!(0x991B1BFF)),
"WARN" => (clr!(0xFEF3C7FF), clr!(0x92400EFF)),
"INFO" => (clr!(0xDBEAFEFF), clr!(0x1E40AFFF)),
_ => (clr!(0xF1F5F9FF), clr!(0x475569FF)),
};
let latency_color = if item.latency_ms > 150 {
clr!(0xDC2626FF)
} else if item.latency_ms > 80 {
clr!(0xD97706FF)
} else {
clr!(0x16A34AFF)
};
row((
cell_txt(
format!("#{}", item.id),
70,
clr!(0x64748BFF),
12.0,
FontWeight::NORMAL,
),
cell_txt(
item.timestamp.clone(),
110,
clr!(0x64748BFF),
12.0,
FontWeight::NORMAL,
),
badge(item.level).style(
Style::new()
.width(Size::Fixed(64))
.bg_color(level_bg)
.corner_radius(4.0)
.set_text_style(
TextStyle::new()
.color(level_fg)
.font_size(11.0)
.font_weight(FontWeight::BOLD),
),
),
cell_txt(item.service, 130, clr!(0x0F172AFF), 12.0, FontWeight::BOLD),
cell_txt(
format!("{}ms", item.latency_ms),
80,
latency_color,
12.0,
FontWeight::BOLD,
),
cell_txt(
item.message.clone(),
450,
clr!(0x334155FF),
12.0,
FontWeight::NORMAL,
),
))
.style(
Style::new()
.width(Size::Percent(1.0))
.height(Size::Fixed(36))
.min_height(36.0)
.max_height(36.0)
.flex_shrink(0.0)
.flex_grow(0.0)
.padding_xy(16.0, 0.0)
.align_items(AlignItems::Center)
.gap(10.0)
.bg_color(row_bg)
.on_hover(|s| s.bg_color(clr!(0xEFF6FFFF))),
)
})
.style(
Style::new()
.width(Size::Percent(1.0))
.flex_grow(1.0)
.flex_shrink(1.0)
.min_height(0.0)
.bg_color(clr!(0xFFFFFFFF)),
);
column((header_bar, table_header, vlist)).style(
Style::new()
.width(Size::Percent(1.0))
.height(Size::Percent(1.0))
.bg_color(clr!(0xFFFFFFFF)),
)
});
window.present_with(
WindowAttributes::default()
.with_title("MTK Virtualized 1,000,000 Log Streamer Demo")
.with_size((960, 720).into()),
);
}