adding and integrating ImGuizmo

editor/panels/scene_hierarchy_panel.hpp

@@ -1,20 +1,38 @@
 #pragma once
 
-#include <sophia/entity.hpp>
+#include <array>
 #include <sophia/frame_info.hpp>
-#include <sophia/scene.hpp>
+#include <sophia/handles.hpp>
 #include <sophia/ui/panel.hpp>
 
+#include "../editor_context.hpp"
+
 class SceneHierarchyPanel : public sophia::Panel {
  public:
-  SceneHierarchyPanel(sophia::Scene& scene, sophia::Entity& selected)
+  // `cubeMesh` is what "+ Cube" gives new entities.
+  SceneHierarchyPanel(EditorContext& context, sophia::MeshHandle cubeMesh)
       : Panel{{.name = "Scene Hierarchy", .locked = true}},
-        scene{scene},
-        selected{selected} {}
+        context{context},
+        cubeMesh{cubeMesh} {}
 
   void onUpdate(const sophia::FrameInfo& frameInfo) override;
 
  private:
-  sophia::Scene& scene;
-  sophia::Entity& selected;
+  // Switches between open scenes, renames the active one, and creates new
+  // ones.
+  void drawSceneSelector();
+  // Replaces the selector with a text field editing the active scene's name.
+  void drawSceneRename();
+
+  EditorContext& context;
+  sophia::MeshHandle cubeMesh;
+  // For naming new scenes "Untitled 1", "Untitled 2", ...
+  int untitledSceneCount = 0;
+
+  // Set while the scene selector is a text field for renaming.
+  bool renamingScene = false;
+  // Frames the text field has left to become active after renaming starts;
+  // focus can take a frame to land. If it never does, renaming ends.
+  int renameFocusFrames = 0;
+  std::array<char, 128> renameBuffer{};
 };