New debug option to show the blueprint in the streams view

crates/re_data_ui/src/component_path.rs

@@ -16,7 +16,17 @@ impl DataUi for ComponentPath {
             component_name,
         } = self;
 
-        let store = ctx.store_db.store();
+        let store = if ctx.app_options.show_blueprint_in_timeline
+            && ctx
+                .store_context
+                .blueprint
+                .entity_db()
+                .is_logged_entity(entity_path)
+        {
+            ctx.store_context.blueprint.store()
+        } else {
+            ctx.store_db.store()
+        };
 
         if let Some(archetype_name) = component_name.indicator_component_archetype() {
             ui.label(format!(

crates/re_data_ui/src/instance_path.rs

@@ -19,7 +19,17 @@ impl DataUi for InstancePath {
             instance_key,
         } = self;
 
-        let store = ctx.store_db.store();
+        let store = if ctx.app_options.show_blueprint_in_timeline
+            && ctx
+                .store_context
+                .blueprint
+                .entity_db()
+                .is_logged_entity(entity_path)
+        {
+            ctx.store_context.blueprint.store()
+        } else {
+            ctx.store_db.store()
+        };
 
         let Some(components) = store.all_components(&query.timeline, entity_path) else {
             if ctx.store_db.entity_db().is_known_entity(entity_path) {

crates/re_time_panel/src/lib.rs

@@ -392,6 +392,7 @@ impl TimePanel {
                         None,
                         &ctx.store_db.entity_db().tree,
                         ui,
+                        "/",
                     );
                 } else {
                     self.show_children(
@@ -403,6 +404,18 @@ impl TimePanel {
                         ui,
                     );
                 }
+                if ctx.app_options.show_blueprint_in_timeline {
+                    self.show_tree(
+                        ctx,
+                        time_area_response,
+                        time_area_painter,
+                        tree_max_y,
+                        None,
+                        &ctx.store_context.blueprint.entity_db().tree,
+                        ui,
+                        "/ (blueprint)",
+                    );
+                }
             });
     }
 
@@ -416,6 +429,7 @@ impl TimePanel {
         last_path_part: Option<&EntityPathPart>,
         tree: &EntityTree,
         ui: &mut egui::Ui,
+        show_root_as: &str,
     ) {
         let tree_has_data_in_current_timeline = ctx.tree_has_data_in_current_timeline(tree);
 
@@ -427,7 +441,7 @@ impl TimePanel {
                 format!("{last_path_part}/") // show we have children with a /
             }
         } else {
-            "/".to_owned()
+            show_root_as.to_owned()
         };
 
         let collapsing_header_id = ui.make_persistent_id(&tree.path);
@@ -531,6 +545,7 @@ impl TimePanel {
                 Some(last_component),
                 child,
                 ui,
+                "/",
             );
         }
 

crates/re_viewer/src/ui/rerun_menu.rs

@@ -338,6 +338,12 @@ impl App {
         )
             .on_hover_text("Show a debug overlay that renders the picking layer information using the `debug_overlay.wgsl` shader.");
 
+        self.re_ui.checkbox(ui,
+                       &mut self.state.app_options.show_blueprint_in_timeline,
+                       "Show Blueprint in the Time Panel",
+        )
+            .on_hover_text("Show the Blueprint data in the Time Panel tree view. This is useful for debugging the internal blueprint state.");
+
         ui.menu_button("Crash", |ui| {
             #[allow(clippy::manual_assert)]
             if ui.button("panic!").clicked() {

crates/re_viewer_context/src/app_options.rs

@@ -26,6 +26,9 @@ pub struct AppOptions {
     /// Displays an overlay for debugging picking.
     pub show_picking_debug_overlay: bool,
 
+    /// Includes the blueprint in the timeline view.
+    pub show_blueprint_in_timeline: bool,
+
     /// What time zone to display timestamps in.
     pub time_zone_for_timestamps: TimeZone,
 }
@@ -46,6 +49,8 @@ impl Default for AppOptions {
 
             show_picking_debug_overlay: false,
 
+            show_blueprint_in_timeline: false,
+
             time_zone_for_timestamps: TimeZone::Utc,
         }
     }