canvas_state.h

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#ifndef YAZE_APP_GUI_CANVAS_CANVAS_STATE_H
#define YAZE_APP_GUI_CANVAS_CANVAS_STATE_H
 
#include <string>
 
#include "app/gui/canvas/canvas_utils.h"
#include "imgui/imgui.h"
 
namespace yaze {
namespace gui {
 
struct CanvasGeometry {
  ImVec2 canvas_p0;    // Top-left screen position
  ImVec2 canvas_p1;    // Bottom-right screen position
  ImVec2 canvas_sz;    // Actual canvas size (unscaled)
  ImVec2 scaled_size;  // Size after applying global_scale
  ImVec2 scrolling;    // Current scroll offset
  // Visible host size in screen pixels, independent of content size and zoom.
  ImVec2 viewport_size;
 
  CanvasGeometry()
      : canvas_p0(0, 0),
        canvas_p1(0, 0),
        canvas_sz(0, 0),
        scaled_size(0, 0),
        scrolling(0, 0),
        viewport_size(0, 0) {}
};
 
struct CanvasState {
  // Core identification
  std::string canvas_id = "Canvas";
  std::string context_id = "CanvasContext";
 
  // Configuration (reference existing CanvasConfig)
  CanvasConfig config;
 
  // Selection (reference existing CanvasSelection)
  CanvasSelection selection;
 
  // Geometry (calculated per-frame)
  CanvasGeometry geometry;
 
  // Interaction state
  ImVec2 mouse_pos_in_canvas = ImVec2(0, 0);
  ImVec2 drawn_tile_pos = ImVec2(-1, -1);
  bool is_hovered = false;
 
  // Drawing state
  ImVector<ImVec2> points;  // Hover preview points
  ImVector<ImVector<std::string>> labels;
  int current_labels = 0;
  int highlight_tile_id = -1;
 
  CanvasState() = default;
 
  // Convenience constructor with ID
  explicit CanvasState(const std::string& id)
      : canvas_id(id), context_id(id + "Context") {}
};
 
}  // namespace gui
}  // namespace yaze
 
#endif  // YAZE_APP_GUI_CANVAS_CANVAS_STATE_H