ochess/src/game_tab/left_panel/GameTabLeftPanel.cpp

#include "GameTabLeftPanel.hpp"
#include <wx/clipbrd.h>

GameTabLeftPanel::GameTabLeftPanel(wxFrame *parent, std::shared_ptr<Game> game)
    : TabGameLeftPanel(parent), game(game), repeat(false), is_engine_on(false) {

  // Configure toolbar (note that toolbar events are processed into the GameTab class)
  game_toolbar->AddTool(0, wxT("Save As"),
  wxArtProvider::GetBitmap(wxART_FILE_SAVE, wxART_TOOLBAR));
  game_toolbar->AddTool(1, wxT("Duplicate Game"),
  wxArtProvider::GetBitmap(wxART_COPY, wxART_TOOLBAR));

  // Add board
  board_canvas = new BoardCanvas((wxFrame *)this);
  main_sizer->Insert(1, board_canvas, 1, wxEXPAND);

  // Configure buttons
  swap_button->SetBitmapLabel(LoadPNG("swap"));
  zoomin_button->SetBitmapLabel(LoadPNG("zoomin"));
  zoomout_button->SetBitmapLabel(LoadPNG("zoomout"));

  // Configure FEN field
  fen_text_field->SetFont(wxFont(*wxNORMAL_FONT).Bold().Larger());
  last_move=game->GetCurrentMove();

  // Bind events:
  Bind(PLAY_MOVE_EVENT, &GameTabLeftPanel::OnPlay, this, wxID_ANY);
  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);
  Bind(wxEVT_KEY_UP, [p=this](wxKeyEvent &e){p->repeat=false;});
  Bind(wxEVT_KEY_DOWN, [p=this](wxKeyEvent &e){
    if(e.GetKeyCode() == WXK_RIGHT){
      p->game->Next();
      p->Notify();
      p->repeat=true;
    } else if(e.GetKeyCode() == WXK_LEFT){
      p->game->Previous();
      p->Notify();
      p->repeat=true;
    }
    // Notify other classes
    wxCommandEvent event(GAME_CHANGE, p->GetId());
    event.SetEventObject(p);
    p->ProcessEvent(event);
  });
  Bind(wxEVT_MOUSEWHEEL, [p=this](wxMouseEvent& e){
    if(e.GetWheelRotation()<0){
      p->game->Next();
      p->Notify();
    }else {
      p->game->Previous();
      p->Notify();
    }
    // Notify other classes
    wxCommandEvent event(GAME_CHANGE, p->GetId());
    event.SetEventObject(p);
    p->ProcessEvent(event);
  });
}

void GameTabLeftPanel::OnPlay(wxCommandEvent &event) {
  engine_arrows.clear(); // Remove displayed engine arrows
  std::string move=event.GetString().ToStdString();
  int size=move.size();
  char promote=(char)event.GetInt();
  // First check if it is a promotion move (to prompt the user for a piece)
  if(size>0 && game->IsPromotionMove(move)){
    promote_on=move.substr(2,2); // Will trigger the piece prompt on next Notify()
    promotion_move=move; // Save the move that should be played for the promotion
  } else {
    if(size==0){ // It is a promotion move?
      move=promotion_move; // Play the save promotion move
      promote_on.clear(); // Clear user prompte (cf. Notify())
      promotion_move.clear();
    }
    if(game->Play(move,promote)){
      // Notify other classes
      wxCommandEvent event(GAME_CHANGE, GetId());
      event.SetEventObject(this);
      ProcessEvent(event);
    }
  }

  Notify(true); // Redraw event is move failed! Otherwise piece not resets to it initial position after dragging
}

void GameTabLeftPanel::SetEngineEvaluation(EngineEvaluation eval){
  if(is_engine_on){
    engine_arrows.clear();
    float scale=1;
    unsigned char color=0;
    for(auto const &arrow: eval.best_lines){
      std::string src=arrow.substr(0,2);
      std::string dst=arrow.substr(2,2);
      engine_arrows.push_back({src,dst,wxColour(color,color,color),scale});
      scale=std::max(0.1,scale-0.25);
      color=std::min(255,color+70);
    }
    eval_cp=eval.eval;
    Notify(true);
  }
}

void GameTabLeftPanel::SetLiveEngineState(bool isOn){
  is_engine_on=isOn;
  if(!is_engine_on){
    engine_arrows.clear();
    eval_cp=0;
    Notify(true);
  }
}


void GameTabLeftPanel::Notify(bool skip_animation) {
  // Update fen and captures
  std::string fen = game->GetFen();
  std::map<char, std::uint8_t> captures;
  bool animate=false;
  HalfMove *m = game->GetCurrentMove();
  std::string src,dst;
  // Update capture and check if we should to animations during moves change:
  if (m){
    captures = m->GetLineCaptures();
    if(m->HasParent(last_move) && !m->IsVariation()){
      m->GetAbsoluteMove(src,dst);
      animate=true;
    }else if(m->HasChild(last_move) && !last_move->IsVariation()){ // call to IsVariation is safe because of HasChild() before! cf below
      // Accessing last_move here is safe since it is still
      // in the tree of moves (since HasChild found it so not deleted)
      last_move->GetAbsoluteMove(dst,src);
      animate=true;
    }
  } else if(game->GetNextMove()){ // First move animation
    HalfMove *next=game->GetNextMove();
    if(next==last_move){
      game->GetNextMove()->GetAbsoluteMove(dst,src);
      animate=true;
    }
  }

  // Update board canvas:
  GameState gs;
  gs.board=chessarbiter::FENParser::Parse(fen).board;
  gs.is_black_turn=game->IsBlackToPlay();
  gs.captures=captures;
  gs.white=game->GetTag("White");
  gs.black=game->GetTag("Black");
  gs.mat_black=game->IsCheckmate(true);
  gs.mat_white=game->IsCheckmate(false);
  gs.arrows=engine_arrows;
  gs.promotion=promote_on;
  gs.show_evalbar=is_engine_on;
  gs.eval=eval_cp/100;
  if(m){
    // There should be a valid src_hl or dst_hl ortherwise it explode:
    std::string src_hl, dst_hl;
    m->GetAbsoluteMove(src_hl,dst_hl);
    if(src_hl.size()>0){ // Just in case
      gs.squares_hl.push_back({src_hl,wxColour(255,190,190)});
      gs.squares_hl.push_back({dst_hl,wxColour(255,100,100)});
    }
  }
  if(skip_animation || !animate){
    board_canvas->SetupBoard(gs);
  }
  else{
    board_canvas->Animate(gs, src,dst,repeat);
  }
  // Update last move
  last_move=m;
  // Update fen field:
  fen_text_field->SetValue(game->GetFen());
}

void GameTabLeftPanel::ApplyPreferences() { board_canvas->ApplyPreferences(); }