Allow hiding top panel via blueprint

crates/re_viewer/src/app.rs

@@ -884,7 +884,7 @@ impl App {
 
                 crate::ui::mobile_warning_ui(&self.re_ui, ui);
 
-                if app_blueprint.top_panel_state != PanelState::Hidden {
+                if app_blueprint.top_panel_state == PanelState::Expanded {
                     crate::ui::top_panel(
                         frame,
                         self,

rerun_py/rerun_sdk/rerun/blueprint/api.py

@@ -317,6 +317,8 @@ def __init__(self, *, expanded: bool | None = None, state: PanelStateLike | None
         state:
             Whether the panel is expanded, collapsed, or hidden.
 
+            Collapsed and hidden both fully hide the top panel.
+
         """
         super().__init__(blueprint_path="top_panel", expanded=expanded, state=state)
 
@@ -335,6 +337,8 @@ def __init__(self, *, expanded: bool | None = None, state: PanelStateLike | None
         state:
             Whether the panel is expanded, collapsed, or hidden.
 
+            Collapsed and hidden both fully hide the top panel.
+
         """
         super().__init__(blueprint_path="blueprint_panel", expanded=expanded, state=state)
 
@@ -353,6 +357,8 @@ def __init__(self, *, expanded: bool | None = None, state: PanelStateLike | None
         state:
             Whether the panel is expanded, collapsed, or hidden.
 
+            Collapsed and hidden both fully hide the top panel.
+
         """
         super().__init__(blueprint_path="selection_panel", expanded=expanded, state=state)
 
@@ -371,6 +377,9 @@ def __init__(self, *, expanded: bool | None = None, state: PanelStateLike | None
         state:
             Whether the panel is expanded, collapsed, or hidden.
 
+            Expanded fully shows the panel, collapsed shows a simplified panel,
+            hidden fully hides the panel.
+
         """
         super().__init__(blueprint_path="time_panel", expanded=expanded, state=state)
 
@@ -383,7 +392,7 @@ def __init__(self, *, expanded: bool | None = None, state: PanelStateLike | None
 helper classes.
 """
 
-BlueprintPart = Union[ContainerLike, BlueprintPanel, SelectionPanel, TimePanel]
+BlueprintPart = Union[ContainerLike, TopPanel, BlueprintPanel, SelectionPanel, TimePanel]
 """
 The types that make up a blueprint.
 """
@@ -430,7 +439,9 @@ def __init__(
             Defaults to `False` unless no Containers or SpaceViews are provided, in which case it defaults to `True`.
             If you want to create a completely empty Blueprint, you must explicitly set this to `False`.
         collapse_panels:
-            Whether to collapse the panels in the viewer. Defaults to `False`.
+            Whether to collapse panels in the viewer. Defaults to `False`.
+
+            This fully hides the blueprint/selection panels, and shows the simplified time panel.
 
         """
         from .containers import Tabs
@@ -442,6 +453,10 @@ def __init__(
         for part in parts:
             if isinstance(part, (Container, SpaceView)):
                 contents.append(part)
+            elif isinstance(part, TopPanel):
+                if hasattr(self, "top_panel"):
+                    raise ValueError("Only one top panel can be provided")
+                self.top_panel = part
             elif isinstance(part, BlueprintPanel):
                 if hasattr(self, "blueprint_panel"):
                     raise ValueError("Only one blueprint panel can be provided")
@@ -492,6 +507,9 @@ def _log_to_stream(self, stream: RecordingStream) -> None:
 
         stream.log("viewport", viewport_arch)  # type: ignore[attr-defined]
 
+        if hasattr(self, "top_panel"):
+            self.top_panel._log_to_stream(stream)
+
         if hasattr(self, "blueprint_panel"):
             self.blueprint_panel._log_to_stream(stream)
         elif self.collapse_panels: