AdwAboutDialog puts the application icon in its own header, which is what the
app now has one for, and adw_about_window_new() is deprecated in favour of it.
It is an AdwDialog and not a GtkWindow, so it clears on ::closed and closes with
adw_dialog_close() -- the same trap the shortcut overview documents, and both
dialogs now share one handler keyed by the pointer to clear.
Two gains while mapping the fields: system_information becomes debug_info, which
renders as a Troubleshooting page with a copy button, and the string behind it
becomes a std::string rather than a char[1024] that truncated a long settings
path in silence.
The probe now reads the icon name back out of the open dialog, so it is asserted
to carry the icon rather than merely to open.
The hand-rolled grid existed to avoid GTK's deprecated GtkShortcutsWindow;
libadwaita 1.8's AdwShortcutsDialog is the supported replacement, so use the
platform widget and get its search, sectioning and shortcut labels for free.
The table strings become GTK accelerator syntax, since the shortcut label parses
them. The six mouse rows cannot: no accelerator syntax names a wheel or a drag,
so they carry an empty accelerator and prose in the new subtitle field.
adw_init() is called in run_ui() and in choose_source() (replacing its
gtk_init()), which means the whole app is drawn with libadwaita's stylesheet.
Verified settled: viewport.w 870..870, axes.w changes 2, x-desync 0.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The pages are Pango markup in a GResource, bundled for the same reason the icons
are: udpscope runs straight out of the build tree with no install step, so a
runtime search path's failure mode would be a silently empty help window.
--c-name=udpscope_help keeps the two generated bundles from colliding.
Every page is validated with pango_parse_markup() at load and falls back to a
one-line stand-in rather than rendering raw markup or nothing. show_help() reuses
help_window.cpp's existing close-request handler, and closes via
gtk_window_close() so that handler runs and the pointer is nulled.
UDPSCOPE_PROBE_HELP_MS loads and validates every page, opens the help and About
windows, closes both and reports; parsed must equal pages.
Martino Ferrari