qgsmeshcalcnode.h

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/***************************************************************************
                          qgsmeshcalcnode.h
                          --------------------------------
    begin                : December 18th, 2018
    copyright            : (C) 2018 by Peter Petrik
    email                : zilolv at gmail dot com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSMESHCALCNODE_H
#define QGSMESHCALCNODE_H

#define SIP_NO_FILE


#include <QMap>
#include <QString>
#include <QStringList>
#include <memory>
#include <limits>

#include "qgis_analysis.h"

#include "qgsmeshcalcutils.h"

struct QgsMeshMemoryDatasetGroup;

class ANALYSIS_EXPORT QgsMeshCalcNode
{
  public:
    enum Type
    {
      tOperator = 1, 
      tNumber, 
      tNoData, 
      tDatasetGroupRef 
    };

    enum Operator
    {
      opPLUS,     
      opMINUS,    
      opMUL,      
      opDIV,      
      opPOW,      
      opEQ,       
      opNE,       
      opGT,       
      opLT,       
      opGE,       
      opLE,       
      opAND,      
      opOR,       
      opNOT,      
      opIF,       
      opSIGN,     
      opMIN,      
      opMAX,      
      opABS,      
      opSUM_AGGR, 
      opMAX_AGGR, 
      opMIN_AGGR, 
      opAVG_AGGR, 
      opNONE,     
    };

    QgsMeshCalcNode();

    QgsMeshCalcNode( double number );

    QgsMeshCalcNode( Operator op, QgsMeshCalcNode *left, QgsMeshCalcNode *right );

    QgsMeshCalcNode( QgsMeshCalcNode *condition /* bool condition */,
                     QgsMeshCalcNode *left /*if true */,
                     QgsMeshCalcNode *right /* if false */ );

    QgsMeshCalcNode( const QString &datasetGroupName );

    ~QgsMeshCalcNode();

    Type type() const;

    void setLeft( QgsMeshCalcNode *left );

    void setRight( QgsMeshCalcNode *right );

    bool calculate( const QgsMeshCalcUtils &dsu, QgsMeshMemoryDatasetGroup &result ) const;

    QStringList usedDatasetGroupNames() const;

    static QgsMeshCalcNode *parseMeshCalcString( const QString &str, QString &parserErrorMsg );

  private:
    Q_DISABLE_COPY( QgsMeshCalcNode )

    Type mType = tNoData;
    std::unique_ptr<QgsMeshCalcNode> mLeft;
    std::unique_ptr<QgsMeshCalcNode> mRight;
    std::unique_ptr<QgsMeshCalcNode> mCondition;
    double mNumber = std::numeric_limits<double>::quiet_NaN();
    QString mDatasetGroupName;
    Operator mOperator = opNONE;
};


#endif // QGSMESHCALCNODE_H