tcptop/.planning/milestones/v1.0-phases/02-interactive-tui/02-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
02-interactive-tui	01	tui	ratatui crossterm tui clap keyboard terminal	phase provides 01-data-pipeline ConnectionRecord, ConnectionTable, format_rate/format_rtt/format_bytes	TUI module with App state, draw, and event handling Terminal lifecycle (init/restore) in main.rs Clap CLI struct with filtering and interval flags Sortable, filterable, color-coded connection table	02-interactive-tui 03-output-packaging	added patterns ratatui 0.30.0 crossterm 0.29.0 futures 0.3 immediate-mode TUI rendering App state struct tokio::select! with EventStream	created modified tcptop/src/tui/mod.rs tcptop/src/tui/app.rs tcptop/src/tui/draw.rs tcptop/src/tui/event.rs Cargo.toml tcptop/Cargo.toml tcptop/src/lib.rs tcptop/src/main.rs	Used Color::Rgb for new/closing connection highlights instead of named colors (DarkGreen/DarkRed not in ratatui) Moved Cli::parse() inside cfg blocks to avoid unused variable warnings on macOS	TUI App struct pattern: centralized state with sort/filter/highlight, rendered each tick EventStream in tokio::select! for non-blocking keyboard input alongside collector events Terminal lifecycle: ratatui::init() before async, ratatui::restore() after	DISP-01 DISP-02 DISP-04 DISP-05 DISP-06 DISP-08	4min	2026-03-22

Phase 02 Plan 01: Core TUI Summary

Ratatui-based interactive TUI with sortable connection table, summary header, bandwidth coloring, and keyboard-driven navigation replacing Phase 1 stdout output

Performance

• Duration: 4 min
• Started: 2026-03-22T02:18:45Z
• Completed: 2026-03-22T02:22:16Z
• Tasks: 3
• Files modified: 8

Accomplishments

• Built full TUI module (app.rs, draw.rs, event.rs) with sortable, filterable connection table
• Added bandwidth-intensity row coloring (dim to bright) and new/closing connection highlights
• Wired terminal lifecycle and clap CLI with 7 flags (--port, --pid, --process, --interface, --tcp, --udp, --interval)
• Replaced Phase 1 stdout streaming with ratatui rendering in tokio::select! loop

Task Commits

Each task was committed atomically:

1. Task 1: Add dependencies and create TUI module with App state - f0f50d7 (feat)
2. Task 2: Create draw.rs and event.rs for rendering and keyboard handling - 17b84fe (feat)
3. Task 3: Wire TUI into main.rs with terminal lifecycle and clap CLI - e05dbb4 (feat)

Files Created/Modified

• tcptop/src/tui/mod.rs - TUI module root declaring app, draw, event submodules
• tcptop/src/tui/app.rs - App state struct with InputMode, SortColumn, CliFilters, sort/filter/highlight methods
• tcptop/src/tui/draw.rs - Rendering: 3-region layout (header, table, status bar), help overlay, bandwidth coloring
• tcptop/src/tui/event.rs - Keyboard handler: mnemonic sort keys, filter-as-you-type, quit, column toggle, scrolling
• tcptop/src/main.rs - Terminal init/restore, clap Cli struct, EventStream in select loop
• Cargo.toml - Added ratatui, crossterm, futures workspace dependencies
• tcptop/Cargo.toml - Added ratatui, crossterm, futures crate dependencies
• tcptop/src/lib.rs - Added pub mod tui;

Decisions Made

• Used Color::Rgb(0, 60, 0) and Color::Rgb(80, 0, 0) for subtle new/closing connection highlights since ratatui does not have DarkGreen/DarkRed named color variants
• Moved Cli::parse() inside #[cfg] blocks to eliminate unused variable warnings when compiling on macOS (Linux-only collector path)

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed DarkGreen/DarkRed color constants

• Found during: Task 2 (draw.rs rendering)
• Issue: Plan specified Color::DarkGreen and Color::DarkRed but ratatui 0.30 only has standard ANSI Color variants (no dark green/red)
• Fix: Used Color::Rgb(0, 60, 0) for new connections and Color::Rgb(80, 0, 0) for closing connections
• Files modified: tcptop/src/tui/draw.rs
• Verification: cargo check compiles clean
• Committed in: 17b84fe (Task 2 commit)

2. [Rule 1 - Bug] Fixed unused variable warnings on macOS

• Found during: Task 3 (main.rs wiring)
• Issue: cli variable and ConnectionTable import unused when compiling on macOS (no Linux cfg)
• Fix: Moved Cli::parse() inside cfg blocks, added #[cfg(target_os = "linux")] to ConnectionTable import
• Files modified: tcptop/src/main.rs
• Verification: cargo check produces zero warnings on macOS
• Committed in: e05dbb4 (Task 3 commit)

---

Total deviations: 2 auto-fixed (2 bugs) Impact on plan: Minor API differences from plan spec. No scope creep.

Issues Encountered

None

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• TUI rendering pipeline complete, ready for Plan 02 (sort/filter/CSV wiring)
• All keyboard shortcuts implemented and ready for interactive use
• --interface flag parsed but not yet wired to collector (documented as TODO for Plan 02)

---

Phase: 02-interactive-tui Completed: 2026-03-22