www.pudn.com > chap03.rar > cell.h

#ifndef CELL_H 
#define CELL_H 
 
#include  
 
class Cell : public QTableWidgetItem 
{ 
public: 
    Cell(); 
 
    QTableWidgetItem *clone() const; 
    void setData(int role, const QVariant &value); 
    QVariant data(int role) const; 
    void setFormula(const QString &formula); 
    QString formula() const; 
    void setDirty(); 
 
private: 
    QVariant value() const; 
    QVariant evalExpression(const QString &str, int &pos) const; 
    QVariant evalTerm(const QString &str, int &pos) const; 
    QVariant evalFactor(const QString &str, int &pos) const; 
 
    mutable QVariant cachedValue; 
    mutable bool cacheIsDirty; 
}; 
 
#endif