Improve pawn promotion code

src/game_tab/Game.cpp

@@ -100,11 +100,11 @@ bool Game::IsCheckmate(bool forBlack){
   return !arbiter.IsBlackTurn() && arbiter.IsCheckMate();
 }
 
-bool Game::Play(std::string move) {
+bool Game::Play(std::string move,char promotion) {
   wxLogDebug("Playing move %s", move);
   std::string fen = GetFen();
   arbiter.Setup(fen);
-  if (arbiter.Play(move)) {
+  if (arbiter.Play(move,promotion)) {
     HalfMove *m = new HalfMove(move, arbiter.GetSAN(), arbiter.GetFEN());
     char capture = arbiter.GetCapture();
     if (capture != ' ') {

src/game_tab/Game.hpp

@@ -29,7 +29,7 @@ public:
   HalfMove *GetMoves();
   std::string GetFen();
   std::string GetResult();
-  bool Play(std::string move);
+  bool Play(std::string move,char promotion='q');
   bool IsBlackToPlay();
   bool IsCheckmate(bool forBlack);
   void Previous();

src/game_tab/left_panel/GameTabLeftPanel.cpp

@@ -25,6 +25,7 @@ GameTabLeftPanel::GameTabLeftPanel(wxFrame *parent, std::shared_ptr<Game> game)
 
   // Bind events:
   Bind(PLAY_MOVE_EVENT, &GameTabLeftPanel::OnPlay, this, wxID_ANY);
+  Bind(PLAY_PROMOTE, &GameTabLeftPanel::OnPromote,this);
   Bind(wxEVT_BUTTON, [bc=board_canvas](wxCommandEvent &event){bc->Zoom(10);}, ZOOM_IN_BTN);
   Bind(wxEVT_BUTTON, [bc=board_canvas](wxCommandEvent &event){bc->Zoom(-10);}, ZOOM_OUT_BTN);
   Bind(wxEVT_BUTTON, [bc=board_canvas](wxCommandEvent &event){bc->Swap();}, SWAP_BTN);
@@ -59,10 +60,14 @@ GameTabLeftPanel::GameTabLeftPanel(wxFrame *parent, std::shared_ptr<Game> game)
   });
 }
 
+void GameTabLeftPanel::OnPromote(wxCommandEvent &event){
+  char piece=event.GetString()[0];
+  wxLogDebug("Promote to %c",piece);
+}
 
 void GameTabLeftPanel::OnPlay(wxCommandEvent &event) {
-  wxLogDebug("Game tab received PLAY_MOVE_EVENT");
-  if (game->Play(event.GetString().ToStdString())) {
+  std::string move=event.GetString().ToStdString();
+  if (game->Play(move)) {
     // Notify other classes
     wxCommandEvent event(GAME_CHANGE, GetId());
     event.SetEventObject(this);

src/game_tab/left_panel/GameTabLeftPanel.hpp

@@ -21,6 +21,7 @@ public:
   void OnPlay(wxCommandEvent &event);
   void OnGotoMove(wxCommandEvent &event);
   void OnRefreshBoard(wxCommandEvent &event);
+  void OnPromote(wxCommandEvent &event);
   void ApplyPreferences();
   void SetSaveToolEnable(bool state){game_toolbar->EnableTool(0,state);};
   void SetEngineArrows(std::vector<std::string> arrows);

src/game_tab/left_panel/board/BoardCanvas.cpp

@@ -9,6 +9,7 @@ tmp=rot_m.TransformPoint(tmp); \
 (PT).x+=xsrc;(PT).y+=ysrc;}
 
 wxDEFINE_EVENT(PLAY_MOVE_EVENT, wxCommandEvent);
+wxDEFINE_EVENT(PLAY_PROMOTE, wxCommandEvent);
 
 BoardCanvas::BoardCanvas(wxFrame *parent)
     : wxPanel(parent), black_side(false), frozen(false),
@@ -134,6 +135,7 @@ void BoardCanvas::SetupBoard(const GameState &new_gs) {
   gs.white_time=new_gs.white_time;
   gs.squares_hl=new_gs.squares_hl;
   gs.arrows=new_gs.arrows;
+  gs.promotion=new_gs.promotion;
   Refresh();
 }
 
@@ -421,11 +423,10 @@ void BoardCanvas::DrawBoard(wxDC &dc) {
     }
   }
   // Ask for promotion
-  /*std::string s="f8";
-  {
-    std::uint8_t sfile = s[0]-'a';
-    std::uint8_t srank = s[1]-'1';
-    bool is_black_promotion=s[1]=='1';
+  if(gs.promotion.size()==2){
+    std::uint8_t sfile = gs.promotion[0]-'a';
+    std::uint8_t srank = gs.promotion[1]-'1';
+    bool is_black_promotion=gs.promotion[1]=='1';
     if (!black_side) {
       srank = 7 - srank;
       sfile = 7 - sfile;
@@ -451,7 +452,7 @@ void BoardCanvas::DrawBoard(wxDC &dc) {
       else
         offset++;
     }
-  }*/
+  }
 }
 
 void BoardCanvas::MouseEvent(wxMouseEvent &event) {
@@ -459,6 +460,34 @@ void BoardCanvas::MouseEvent(wxMouseEvent &event) {
   if(frozen)
     return;
 
+  // If ask for promotion just wait for the user reply
+  if(gs.promotion.size()==2){
+    if(event.LeftDown()){
+      REFRESH_MOUSE_LOCATION();
+      INIT_CURRENT_SQUARE();
+      if (IsCurrentSquareValid) {
+        if((char)('a' + file)==gs.promotion[0]){
+          std::uint8_t prank=abs((int)gs.promotion[1]-(int)(char)('1' + rank));
+          if(prank<=3){
+            wxLogDebug("%d",(int)prank);
+            wxCommandEvent event(PLAY_PROMOTE, GetId());
+            event.SetEventObject(this);
+            if(prank==1)
+              event.SetString("r");
+            else if(prank==2)
+              event.SetString("b");
+            else if(prank==3)
+              event.SetString("n");
+            else
+              event.SetString("q");
+            ProcessEvent(event);
+          }
+        }
+      }
+    }
+    return;
+  }
+
   // Just redraw if a piece is currently being moved:
   if (event.Dragging() && valid_drag) {
     is_dragging = true;

src/game_tab/left_panel/board/BoardCanvas.hpp

@@ -12,6 +12,7 @@
 
 // Local events
 wxDECLARE_EVENT(PLAY_MOVE_EVENT, wxCommandEvent);
+wxDECLARE_EVENT(PLAY_PROMOTE, wxCommandEvent);
 
 #define REFRESH_MOUSE_LOCATION()                                               \
   {                                                                            \
@@ -74,6 +75,7 @@ typedef struct GameState {
   } Square;
   std::string white, black;
   std::string board;
+  std::string promotion;
   std::map<char, std::uint8_t> captures;
   std::vector<Square> squares_hl;
   std::vector<Arrow> arrows;