From 90bd5ca05bea4dbeaaeff5cbe13b5671da420c82 Mon Sep 17 00:00:00 2001
From: scratko <m@scratko.xyz>
Date: Fri, 25 Jul 2025 17:04:21 +0300
Subject: July update

Added const qualifiers is_next_to_empty_box() became visible to other files().
The size of the main window has been changed.
Checking whether the A* algorithm has been launched before starting a new game
or the same A* algorithm.
Fixed indentation in lambda expressions.
The initial node is added to open_queue without additional creation of dynamic
memory (the address of the object field is taken).
Fixed PQ_cont.erase().
IsNearEmptyBox was removed().
EqualNode moved to the Node class.
---
 puzzle.hpp | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

(limited to 'puzzle.hpp')

diff --git a/puzzle.hpp b/puzzle.hpp
index 09660c8..88f13ac 100644
--- a/puzzle.hpp
+++ b/puzzle.hpp
@@ -17,15 +17,21 @@ enum {
 };
 
 class Puzzle : public Fl_Button{
-public:
-    unsigned char sequence_number;
+private:
+    unsigned char sequence_number{};
+    // Path for file access error handling (ERR_FILE_ACCESS)
     std::string path;
     Fl_PNG_Image *stored_img_pointer;
+public:
     Puzzle(int x, int y)
         : Fl_Button(x, y, puzzle_size, puzzle_size),
-        stored_img_pointer(nullptr) {
-        }
+        stored_img_pointer(nullptr)
+    {
+    }
     ~Puzzle() { delete stored_img_pointer; }
+    friend class GameParams;
+    friend class PuzzleGame;
+    friend class ASearch;
 };
 
 class GameParams {
@@ -43,9 +49,9 @@ private:
     coordinates empty_box;
     std::vector<std::unique_ptr<Puzzle>> puzzles;
     Fl_Window *win;
-    /*
-     * selecting the current directory where the user image is stored
-     */
+    // True while A* is solving the puzzle; blocks new game and solving again
+    bool is_a_star_active = false;
+    // selecting the current directory where the user image is stored
     std::string cur_directory;
 
     GameParams(Fl_Window *a_win = nullptr)
@@ -53,14 +59,17 @@ private:
         {}
     void CalculateStandardPuzzlePos();
     void ResetFreePuzzles();
+    void ResetAStarActive() { is_a_star_active = false; }
+    void SetAStarActive() { is_a_star_active = true; }
     void NextUntestedPuzzles();
     bool IsSolvability();
     void CreateNewPuzzles();
     void SelectRandomPicture();
     Fl_PNG_Image *LoadPictureParts(std::unique_ptr<Puzzle>& tmp_puzzle);
-public:
     void SetXYEmptyBox(int x, int y) { empty_box.x = x; empty_box. y = y; }
     coordinates GetXYEmptyBox() { return empty_box; }
+public:
+    bool GetAStarActive() { return is_a_star_active; }
     static GameParams *SetUpParams(Fl_Window *win) {
         if(instance)
             return instance;
-- 
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