bcegurobicallback.hpp

// This file is part of the BCESolve library for games of incomplete
// information
// Copyright (C) 2022 Benjamin A. Brooks
// 
// BCESolve free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// BCESolve is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see
// <http://www.gnu.org/licenses/>.
// 
// Benjamin A. Brooks
// ben@benjaminbrooks.net
// Chicago, IL
 
#include "gurobi_c++.h"
#include <QObject>
 
using namespace std;
 
class BCEGurobiCallback: public QObject, public GRBCallback
{
  Q_OBJECT
 
private:
  bool cancelFlag;
  bool isFullOutput;
 
public:
 
  BCEGurobiCallback():
    cancelFlag(false),isFullOutput(true)
  {}
 
  void setFullOutput(bool toggle) {
    isFullOutput = toggle;
  }
 
public slots:
 
  void setCancelFlagTrue() {
    cancelFlag = true;
  }
 
protected:
 
  void callback () {
    try {
      if (where == GRB_CB_BARRIER) {
    if (cancelFlag) {
      abort();
    }
      }
      else if (where == GRB_CB_SIMPLEX) {
    if (cancelFlag) {
      abort();
    }
      }
      else if (where == GRB_CB_MESSAGE) {
    if (isFullOutput) {
      string algorithmOutput = getStringInfo(GRB_CB_MSG_STRING);
      // Will be redirected to log file by bcelogstream.
      cout << algorithmOutput << endl;
    }
      }
    }
    catch (GRBException e) {
      cout << "======= GRB ERROR =======" << endl;
      cout << "GRB Error Code: " << e.getErrorCode() << endl;
      cout << e.getMessage() << endl;
    } 
    catch (...) {
      cout << "GRBCallback error, unrelated to GRB error codes." << endl;
    }
  }
 
};