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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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