flameshot/external/singleapplication/examples/calculator/calculator.h

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#ifndef CALCULATOR_H
#define CALCULATOR_H

#include <QWidget>

QT_BEGIN_NAMESPACE
class QLineEdit;
QT_END_NAMESPACE
class Button;

//! [0]
class Calculator : public QWidget
{
    Q_OBJECT

public:
    Calculator(QWidget* parent = 0);

private slots:
    void digitClicked();
    void unaryOperatorClicked();
    void additiveOperatorClicked();
    void multiplicativeOperatorClicked();
    void equalClicked();
    void pointClicked();
    void changeSignClicked();
    void backspaceClicked();
    void clear();
    void clearAll();
    void clearMemory();
    void readMemory();
    void setMemory();
    void addToMemory();
    //! [0]

    //! [1]
private:
    //! [1] //! [2]
    Button* createButton(const QString& text, const char* member);
    void abortOperation();
    bool calculate(double rightOperand, const QString& pendingOperator);
    //! [2]

    //! [3]
    double sumInMemory;
    //! [3] //! [4]
    double sumSoFar;
    //! [4] //! [5]
    double factorSoFar;
    //! [5] //! [6]
    QString pendingAdditiveOperator;
    //! [6] //! [7]
    QString pendingMultiplicativeOperator;
    //! [7] //! [8]
    bool waitingForOperand;
    //! [8]

    //! [9]
    QLineEdit* display;
    //! [9] //! [10]

    enum
    {
        NumDigitButtons = 10
    };
    Button* digitButtons[NumDigitButtons];
};
//! [10]

#endif