source: capability panels as side-stack pages, with a probe for the path

src/ui.cpp

@@ -2978,9 +2978,14 @@ std::string icon_report(GtkIconTheme* theme, const char* name, const char* resou
 /// The words the pills do not draw. The pages' `title` is empty on purpose (see the `.ui`), so the
 /// human name of a tab lives here and is put on the pill — its tooltip and its accessible name — by
 /// `name_side_tabs()`. That keeps an icon-only pill a *named* control for a screen reader.
-static const char* side_tab_title(const char* name) {
+static const char* side_tab_title(const App& app, const char* name) {
   if (name != nullptr && std::strcmp(name, "measure") == 0) return "Measure";
   if (name != nullptr && std::strcmp(name, "signals") == 0) return "Signals";
+  if (name != nullptr) {
+    for (const SourcePanelPage& p : app.source_panels) {
+      if (p.name == name) return p.title.c_str();
+    }
+  }
   return "";
 }
 
@@ -3000,7 +3005,7 @@ void name_side_tabs(App& app) {
   for (guint i = 0; pages != nullptr && pill != nullptr && i < g_list_model_get_n_items(pages);
        pill = gtk_widget_get_next_sibling(pill), ++i) {
     AdwViewStackPage* page = ADW_VIEW_STACK_PAGE(g_list_model_get_item(pages, i));
-    const char* title = side_tab_title(adw_view_stack_page_get_name(page));
+    const char* title = side_tab_title(app, adw_view_stack_page_get_name(page));
     g_object_unref(page);
     if (title[0] == '\0') continue;
     gtk_widget_set_tooltip_text(pill, title);
@@ -3457,6 +3462,7 @@ gboolean tick(gpointer user) {
   // no text and no name either.
   name_side_tabs(*app);
   note_panel_controls(*app);
+  sync_source_panels(*app);
   // The tour, re-measured every frame: the target's allocation is 0 on the frame it is first shown
   // (see the allocation bullets in `docs/claude/invariants-trigger-and-pinning.md`) and the widget
   // moves under the spotlight on a window resize, so a one-shot measurement is wrong both ways.
@@ -4551,7 +4557,8 @@ gboolean tick(gpointer user) {
   }
   if (app->capture_button != nullptr) {
     // Insensitive until connected: the capture's path is keyed on the source.
-    gtk_widget_set_sensitive(app->capture_button, snap.connected ? TRUE : FALSE);
+    gtk_widget_set_sensitive(app->capture_button,
+                             snap.connected && app->source_has_datagrams ? TRUE : FALSE);
     if (app->capture_want_ui && !app->acq->capture_want()) {
       // The producer refused the open (a full disk, a read-only directory) and cleared
       // the flag; the button follows the flag rather than lying about the state. Going
@@ -5282,6 +5289,9 @@ void on_activate(GtkApplication* application, gpointer user) {
     g_signal_connect(app->side_stack, "notify::visible-child-name",
                      G_CALLBACK(on_side_tab_changed), app);
   }
+  // The source kind's own tabs (a generator, digital I/O). Before the first tick: that is when
+  // `name_side_tabs()` puts the words on the pills, and it must see these pages too.
+  build_source_panels(*app);
 
   // The left side is the events pane *and* the plot, in one row: the pane is a column of its own
   // (the item's "collapsable pane on the left"), revealed by trigger mode.
@@ -5926,6 +5936,7 @@ int run_ui(int argc, char** argv, const Config& cfg, ScopeModel& model, Acquisit
   } else {
     app.source_title = app.source_host + ":" + std::to_string(app.source_port);
   }
+  if (SourceKind* k = find_kind(cfg.source_kind)) app.source_has_datagrams = k->has_datagrams();
   // The event cache is keyed on the source, like the packet capture. A waveform has no source, so a
   // file-mode run has no cache either -- there are no latches in a file.
   if (!app.source_host.empty() && app.source_port != 0) {
@@ -6098,6 +6109,9 @@ int run_ui(int argc, char** argv, const Config& cfg, ScopeModel& model, Acquisit
   if (const char* env = g_getenv("UDPSCOPE_PROBE_DENSITY_MS")) {
     g_timeout_add(static_cast<guint>(std::atoi(env)), density_probe, &app);
   }
+  if (const char* env = g_getenv("UDPSCOPE_PROBE_SOURCE_KINDS")) {
+    g_timeout_add(static_cast<guint>(std::atoi(env)), source_kinds_probe, &app);
+  }
 
   // Our own options were consumed by parse_args(); GTK would reject them, so only
   // the program name is handed to g_application_run().