Files
udpscope/todo.md
T
Martino Ferrari 0e256764d5 udpscope: an oscilloscope view for a UDPStreamer source
GTK4 and libadwaita. It receives one UDP stream through the vendored
udpsclient, buffers it in a large ring, and draws it with the vendored
plotter: a trigger with a pre/post event window, a pause that freezes the
window, cursors, measurements, math channels in a node editor, an event cache,
named configurations, preferences, and an export of the visible window to
.npy/.csv. Waveform files can be opened and analysed in place.

The interface is two threads -- a producer that owns the socket and the GTK
main thread that owns every widget and the GL context -- sharing one model
under one mutex, with samples crossing through lock-free rings.

deps/plotter is a submodule pinned to the commit this tree builds against;
deps/udpsclient is vendored in place. docs/claude/ documents the rules that
cost a defect to learn, and SPECS.md is the requirement document.
2026-10-11 15:21:40 +02:00

4.4 KiB

  • (1) fix vertical lines to small to be seen: in some cases (e.g. rect waveform in @mock_upstreamer.py) the vertical lines are to thin to be visible (sometime they glitch in and out of existence):
    1. the antialisaing strategy with phosphore effect should be applied with more stregth
    2. the lines should be more tick
    3. the sample points should be bigger
  • (2) relative timing done: --relative-time; see README and SPECS.md for the measured history cost.
    • in order to avoid problem with time jitter user can decide to go in relative time mode
    • in this mode absolute signal time is only use for export
    • the plot time depends just on signal sample rate and frame number, e.g.:
      • user is acquiring a signal with 1MSps and 100_000 samples per udp frame
      • last frame as number and previous in this case a 100_000 indexes must be skipped
      • time is simply: ((<N_frame> - <N_last>) * <n_samples_per_frame> - <sample_index>) / <sample rate> (or something like that)
  • (3) named configurations done: one directory per source holding <name>.toml per configuration plus active; a configuration carries a note and the startup settings (buffer_mb, relative_time, capture_packets); the chooser lists them and the menu's Configurations… opens/saves/deletes them.
  • (4) optional udp frame storage for debugging of strange behaviours done: --capture-packets N; see README and the design note in docs/superpowers/specs/ for the ring file, the popover toggle and tools/capture_to_pcap.py.
  • (5) open exported binary waveforms to view/analyse done: --open FILE and the chooser's Waveforms page (the files opened before, newest first, plus Open…); the .npy's dtype names the columns, so a load restores the signals, the samples and the axis the export had, and every instrument works on it — see README and docs/claude/invariants-data-path.md.
  • (6) imporve right click menu on the plots done: the plot's context menu uses the main menu's row style (menu_button + .udpscope-menu, asserted by UDPSCOPE_PROBE_ROWMENU_MS: uniform label_x=26, h=18, the shortcut flush right), and deleting a signal is a Remove signal submenu listing that plot's traces plus All traces on this plot.
  • (7) in layout edit mode add the option to drag plot border to resize them (sizing should be persistant between sessesions as the layout)
  • (8) add option to automatic save the last triggered acquisitions in a cache folder and let the user replay them done: every latch is written to <cache>/<source>/events/ as a .npy (the export format), a .txt sidecar and a .bmp preview drawn from the samples; the events pane (revealed with trigger mode, switchable) lists them with time, duration, signals and rate, shows the preview, replays one through the --open loader and has Live to go back -- see README and docs/claude/invariants-trigger-and-pinning.md.
  • (9) preferences dialog done: src/settings.{hpp,cpp} (the store: load/save/defaults, GTK-free) + src/ui_prefs.cpp (the dialog, opened from the overflow menu); the cache directory and keep count reach EventStore, the cache directory (one events/ directory for every source, each source a folder inside) and the keep count reach EventStore, and relative time is a start-up default; whether anything is cached at all stays the trigger pane's own switch. The same dialog opens from the host selection dialog too (a PrefsForm has no owner, so both windows hold one), where a change still reaches the run about to start.
    • user can choose evnt cache directory (default /.cache/udpscope//events/)
    • maximum number of events to cache
    • disable completly the events storage option
    • enable/disable relative time mode
    • interface dark/light/auto color
    • defaults
    • other parameters
  1. move the interface into .ui resources, and to current GTK4/libadwaita widgets while doing it:
  • the shortcut overview is done (src/ui/shortcuts.ui, with the mouse gestures drawn as icons, and [help]'s ui= against tables= as the guard)
  • next: the preferences (AdwPreferencesDialog + AdwEntryRow/AdwSpinRow/AdwSwitchRow), the help window's chrome, the source chooser and its host form, then the main window's skeleton
  • plan, conventions and acceptance for each slice: docs/superpowers/plans/2026-10-11-ui-files-and-gtk4-practice.md