sprite_interaction_handler.h

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#ifndef YAZE_APP_EDITOR_DUNGEON_INTERACTION_SPRITE_INTERACTION_HANDLER_H_
#define YAZE_APP_EDITOR_DUNGEON_INTERACTION_SPRITE_INTERACTION_HANDLER_H_
 
#include "app/editor/dungeon/interaction/base_entity_handler.h"
#include "zelda3/sprite/sprite.h"
 
namespace yaze {
namespace editor {
 
class SpriteInteractionHandler : public BaseEntityHandler {
 public:
  enum class PlacementBlockReason {
    kNone = 0,
    kInvalidRoom,
    kSpriteLimit,
  };
 
  // ========================================================================
  // BaseEntityHandler interface
  // ========================================================================
 
  void BeginPlacement() override;
  void CancelPlacement() override { sprite_placement_mode_ = false; }
  bool IsPlacementActive() const override { return sprite_placement_mode_; }
 
  bool HandleClick(int canvas_x, int canvas_y) override;
  void HandleDrag(ImVec2 current_pos, ImVec2 delta) override;
  void HandleRelease() override;
 
  void DrawGhostPreview() override;
  void DrawSelectionHighlight() override;
 
  std::optional<size_t> GetEntityAtPosition(int canvas_x,
                                             int canvas_y) const override;
 
  // ========================================================================
  // Sprite-specific methods
  // ========================================================================
 
  void SetSpriteId(uint8_t id) { preview_sprite_id_ = id; }
 
  uint8_t GetSpriteId() const { return preview_sprite_id_; }
 
  void SelectSprite(size_t index);
 
  void ClearSelection();
 
  bool HasSelection() const { return selected_sprite_index_.has_value(); }
 
  std::optional<size_t> GetSelectedIndex() const { return selected_sprite_index_; }
 
  void DeleteSelected();
 
  bool was_placement_blocked() const {
    return placement_block_reason_ != PlacementBlockReason::kNone;
  }
  PlacementBlockReason placement_block_reason() const {
    return placement_block_reason_;
  }
  void clear_placement_blocked() {
    placement_block_reason_ = PlacementBlockReason::kNone;
  }
 
 private:
  // Placement state
  bool sprite_placement_mode_ = false;
  uint8_t preview_sprite_id_ = 0;
  PlacementBlockReason placement_block_reason_ = PlacementBlockReason::kNone;
 
  // Selection state
  std::optional<size_t> selected_sprite_index_;
  bool is_dragging_ = false;
  ImVec2 drag_start_pos_;
  ImVec2 drag_current_pos_;
 
  void PlaceSpriteAtPosition(int canvas_x, int canvas_y);
 
  std::pair<int, int> CanvasToSpriteCoords(int canvas_x, int canvas_y) const;
};
 
}  // namespace editor
}  // namespace yaze
 
#endif  // YAZE_APP_EDITOR_DUNGEON_INTERACTION_SPRITE_INTERACTION_HANDLER_H_