ui: a badge bar with a Trigger badge, and the trigger form in the slide-over

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/ui.cpp

@@ -3380,6 +3380,7 @@ gboolean tick(gpointer user) {
   if (app->window == nullptr) return G_SOURCE_REMOVE;
   note_panel_controls(*app);
   sync_source_panels(*app);
+  sync_badge_bar(*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.
@@ -5021,13 +5022,17 @@ void on_activate(GtkApplication* application, gpointer user) {
   GtkWidget* side_switcher = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "side_switcher"));
   GtkWidget* measure_page = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "measure_page"));
   GtkWidget* signals_page = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "signals_page"));
+  app->badge_bar = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "badge_bar"));
+  app->badge_signals = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "badge_signals"));
+  app->badge_system = GTK_WIDGET(gtk_builder_get_object(app->window_ui, "badge_system"));
   // A missing id is the one mistake neither the build nor `GtkBuilder` sees, and every use below would
   // be a null pointer.
   if (app->window == nullptr || side_view == nullptr || events_divider == nullptr ||
       app->plot_box == nullptr || app->plot_overlay == nullptr || app->plot_split == nullptr ||
       app->status_badge == nullptr ||
       app->status_label == nullptr || app->status_info_button == nullptr ||
-      app->status_row == nullptr ||
+      app->status_row == nullptr || app->badge_bar == nullptr || app->badge_signals == nullptr ||
+      app->badge_system == nullptr ||
       side == nullptr || side_stack == nullptr || side_switcher == nullptr ||
       measure_page == nullptr || signals_page == nullptr) {
     return;
@@ -5067,6 +5072,8 @@ void on_activate(GtkApplication* application, gpointer user) {
   }
   // The slide-over panel: an overlay child of the plot, above the GL area.
   build_slideover(*app);
+  // The badge bar reads `trigger_toggle`, which `build_toolbar()` made above.
+  build_badge_bar(*app);
 
   // The size the window opens at, stated in code as well as in the `.ui`: `default-width` there is the
   // size it *asks* for, and a window whose content has a larger minimum opens at that minimum instead --
@@ -5188,10 +5195,10 @@ void on_activate(GtkApplication* application, gpointer user) {
   gtk_box_append(GTK_BOX(measure_page), gtk_separator_new(GTK_ORIENTATION_HORIZONTAL));
   gtk_box_append(GTK_BOX(measure_page), build_measures_panel(*app));
 
-  // Signals: the trigger picks a channel from the list beside it.
+  // The trigger form lives in the slide-over (reached by the Trigger badge); the signal list stays in the
+  // sidebar until the dock replaces it.
   app->trigger_panel = build_trigger_panel(*app);
-  gtk_box_append(GTK_BOX(signals_page), app->trigger_panel);
-  gtk_box_append(GTK_BOX(signals_page), gtk_separator_new(GTK_ORIENTATION_HORIZONTAL));
+  slideover_add_page(*app, "trigger", "Trigger", app->trigger_panel);
   app->signal_panel = build_signal_panel(*app);
   gtk_box_append(GTK_BOX(signals_page), app->signal_panel);
 
@@ -5912,6 +5919,9 @@ int run_ui(int argc, char** argv, const Config& cfg, ScopeModel& model, Acquisit
   if (const char* env = g_getenv("UDPSCOPE_PROBE_SLIDEOVER_MS")) {
     g_timeout_add(static_cast<guint>(std::atoi(env)), slideover_probe, &app);
   }
+  if (const char* env = g_getenv("UDPSCOPE_PROBE_BADGES_MS")) {
+    g_timeout_add(static_cast<guint>(std::atoi(env)), badges_probe, &app);
+  }
   if (const char* env = g_getenv("UDPSCOPE_PROBE_SEARCH_MS")) {
     g_timeout_add(static_cast<guint>(std::atoi(env)), search_probe, &app);
   }