---
phase: 06-keyboard-ux-filter-pickers
plan: "02"
subsystem: ui
tags: [textual, modalscreen, filter, bindings, statsbar, datatable]

# Dependency graph
requires:
  - phase: 06-keyboard-ux-filter-pickers
    plan: "01"
    provides: FilterPickerScreen(ModalScreen) reusable VIM-style picker modal
provides:
  - r/c/t key bindings in MainScreen that open FilterPickerScreen for Room, Container, Category filters
  - Filter state persisted in MainScreen (_filter_room/container/category _id/_name)
  - list_items() called with filter IDs on each load — SQL-level filtering
  - StatsBar.refresh_stats() showing filtered item count and filter tag strings
  - Zero-match empty-state row in DataTable when filters active but no results
  - Toggle-to-clear behavior: re-selecting active filter value clears the filter
affects: [06-03, 06-04]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - Deferred imports inside action methods for FilterPickerScreen (same pattern as EditItemScreen)
    - _any_input_active() guard prevents pickers from opening over text input overlays
    - item_count_override in StatsBar.refresh_stats() allows filtered count display without changing DB query
    - Empty-state sentinel row with key="__empty__" — not in self._items so detail panel/edit/delete are safe

key-files:
  created: []
  modified:
    - possession/tui/widgets/statsbar.py
    - possession/tui/screens/main.py

key-decisions:
  - "StatsBar.refresh_stats() takes item_count_override (Optional[int]) so callers control displayed count without re-querying"
  - "filter_tags str appended after count in stats bar — single string arg keeps signature simple and avoids list unpacking"
  - "_any_input_active() guard centralizes the check for open text overlays so action methods stay clean"
  - "Empty-state row uses key='__empty__' — sentinel value distinct from any valid item ID, so existing detail panel / edit / delete code ignores it naturally"
  - "Zero-match state shows empty row only when picker filter active (not text filter), preventing confusion when /search yields nothing"

patterns-established:
  - "_any_input_active() guard pattern — check before opening any modal from a binding to prevent double-open over text inputs"
  - "item_count_override + filter_tags pattern — stats bar always shows correct filtered count without needing to know about filter state directly"

requirements-completed: [FILT-01, FILT-02, FILT-03]

# Metrics
duration: 2min
completed: 2026-02-28
---

# Phase 6 Plan 02: MainScreen Filter Wiring Summary

**r/c/t bindings in MainScreen wire FilterPickerScreen to live SQL-filtered item list with StatsBar showing filtered count and [Tag: Name] labels**

## Performance

- **Duration:** ~2 min
- **Started:** 2026-02-28T10:20:59Z
- **Completed:** 2026-02-28T10:22:55Z
- **Tasks:** 2 (Task 3 is human-verify checkpoint)
- **Files modified:** 2

## Accomplishments
- StatsBar.refresh_stats() extended to accept item_count_override and filter_tags, showing filtered count and active filter labels
- MainScreen wired with r/c/t bindings, filter state fields, picker callbacks, and toggle-to-clear behavior
- _load_items() now passes filter IDs to list_items() for SQL-level filtering
- Zero-match empty state row displayed in DataTable when picker filter active but no items match
- _any_input_active() guard prevents pickers opening when filter/quickadd/delete-confirm overlays are open

## Task Commits

Each task was committed atomically:

1. **Task 1: Update StatsBar to accept filtered count and filter tags** - `df14b7f` (feat)
2. **Task 2: Wire filter state, bindings, and picker callbacks in MainScreen** - `6609f70` (feat)

**Plan metadata:** (docs commit follows)

## Files Created/Modified
- `possession/tui/widgets/statsbar.py` - Added Optional import; extended refresh_stats() with item_count_override and filter_tags params
- `possession/tui/screens/main.py` - Added 6 filter state fields, r/c/t bindings, _build_filter_tags(), _any_filter_active(), _any_input_active(), updated _load_items()/_refresh_stats()/_apply_filter(), added 3 picker action methods + 3 picker callbacks

## Decisions Made
- StatsBar.refresh_stats() takes item_count_override as Optional[int] — when provided uses that value instead of the global get_stats() item_count; this keeps the DB query in StatsBar but lets the caller override the displayed number
- filter_tags is a pre-formatted string (not a list) — simpler signature; caller builds the string via _build_filter_tags()
- _any_input_active() extracts the guard check into a helper so all three picker actions share the same guard cleanly
- Empty-state row uses key="__empty__" sentinel — the detail panel, edit, and delete code all look up items by row key in self._items, and "__empty__" is not a valid integer ID, so those handlers silently no-op on that row

## Deviations from Plan

None — plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None — no external service configuration required.

## Next Phase Readiness
- Complete end-to-end filter picker system ready for human verification (Task 3 checkpoint)
- After verification: Plan 03 can build on this foundation (additional UX polish, or next phase features)
- FilterPickerScreen + MainScreen callback pattern fully established for any future picker screens

---
*Phase: 06-keyboard-ux-filter-pickers*
*Completed: 2026-02-28*
