backend-infra-engineer: Release v0.3.0 snapshot

src/app/editor/dungeon/dungeon_object_interaction.h

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+#ifndef YAZE_APP_EDITOR_DUNGEON_DUNGEON_OBJECT_INTERACTION_H
+#define YAZE_APP_EDITOR_DUNGEON_DUNGEON_OBJECT_INTERACTION_H
+
+#include <vector>
+#include <functional>
+
+#include "imgui/imgui.h"
+#include "app/gui/canvas.h"
+#include "app/zelda3/dungeon/room.h"
+#include "app/zelda3/dungeon/room_object.h"
+
+namespace yaze {
+namespace editor {
+
+/**
+ * @brief Handles object selection, placement, and interaction within the dungeon canvas
+ * 
+ * This component manages mouse interactions for object selection (similar to OverworldEditor),
+ * object placement, drag operations, and multi-object selection.
+ */
+class DungeonObjectInteraction {
+ public:
+  explicit DungeonObjectInteraction(gui::Canvas* canvas) : canvas_(canvas) {}
+  
+  // Main interaction handling
+  void HandleCanvasMouseInput();
+  void CheckForObjectSelection();
+  void PlaceObjectAtPosition(int room_x, int room_y);
+  
+  // Selection rectangle (like OverworldEditor)
+  void DrawObjectSelectRect();
+  void SelectObjectsInRect();
+  
+  // Drag and select box functionality
+  void DrawSelectBox();
+  void DrawDragPreview();
+  void UpdateSelectedObjects();
+  bool IsObjectInSelectBox(const zelda3::RoomObject& object) const;
+  
+  // Coordinate conversion
+  std::pair<int, int> RoomToCanvasCoordinates(int room_x, int room_y) const;
+  std::pair<int, int> CanvasToRoomCoordinates(int canvas_x, int canvas_y) const;
+  bool IsWithinCanvasBounds(int canvas_x, int canvas_y, int margin = 32) const;
+  
+  // State management
+  void SetCurrentRoom(std::array<zelda3::Room, 0x128>* rooms, int room_id);
+  void SetPreviewObject(const zelda3::RoomObject& object, bool loaded);
+  
+  // Selection state
+  const std::vector<size_t>& GetSelectedObjectIndices() const { return selected_object_indices_; }
+  bool IsObjectSelectActive() const { return object_select_active_; }
+  void ClearSelection();
+  
+  // Callbacks
+  void SetObjectPlacedCallback(std::function<void(const zelda3::RoomObject&)> callback) {
+    object_placed_callback_ = callback;
+  }
+  void SetCacheInvalidationCallback(std::function<void()> callback) {
+    cache_invalidation_callback_ = callback;
+  }
+
+ private:
+  gui::Canvas* canvas_;
+  std::array<zelda3::Room, 0x128>* rooms_ = nullptr;
+  int current_room_id_ = 0;
+  
+  // Preview object state
+  zelda3::RoomObject preview_object_{0, 0, 0, 0, 0};
+  bool object_loaded_ = false;
+  
+  // Drag and select infrastructure
+  bool is_dragging_ = false;
+  bool is_selecting_ = false;
+  ImVec2 drag_start_pos_;
+  ImVec2 drag_current_pos_;
+  ImVec2 select_start_pos_;
+  ImVec2 select_current_pos_;
+  std::vector<int> selected_objects_;
+  
+  // Object selection rectangle (like OverworldEditor)
+  bool object_select_active_ = false;
+  ImVec2 object_select_start_;
+  ImVec2 object_select_end_;
+  std::vector<size_t> selected_object_indices_;
+  
+  // Callbacks
+  std::function<void(const zelda3::RoomObject&)> object_placed_callback_;
+  std::function<void()> cache_invalidation_callback_;
+};
+
+}  // namespace editor
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_DUNGEON_DUNGEON_OBJECT_INTERACTION_H