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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the examples of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef CALCULATOR_H |
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43 #define CALCULATOR_H |
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44 |
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45 #include <QDialog> |
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46 |
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47 QT_BEGIN_NAMESPACE |
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48 class QLineEdit; |
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49 QT_END_NAMESPACE |
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50 class Button; |
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51 |
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52 //! [0] |
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53 class Calculator : public QDialog |
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54 { |
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55 Q_OBJECT |
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56 |
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57 public: |
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58 Calculator(QWidget *parent = 0); |
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59 |
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60 private slots: |
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61 void digitClicked(); |
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62 void unaryOperatorClicked(); |
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63 void additiveOperatorClicked(); |
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64 void multiplicativeOperatorClicked(); |
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65 void equalClicked(); |
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66 void pointClicked(); |
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67 void changeSignClicked(); |
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68 void backspaceClicked(); |
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69 void clear(); |
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70 void clearAll(); |
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71 void clearMemory(); |
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72 void readMemory(); |
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73 void setMemory(); |
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74 void addToMemory(); |
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75 //! [0] |
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76 |
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77 //! [1] |
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78 private: |
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79 //! [1] //! [2] |
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80 Button *createButton(const QString &text, const char *member); |
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81 void abortOperation(); |
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82 bool calculate(double rightOperand, const QString &pendingOperator); |
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83 //! [2] |
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84 |
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85 //! [3] |
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86 double sumInMemory; |
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87 //! [3] //! [4] |
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88 double sumSoFar; |
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89 //! [4] //! [5] |
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90 double factorSoFar; |
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91 //! [5] //! [6] |
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92 QString pendingAdditiveOperator; |
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93 //! [6] //! [7] |
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94 QString pendingMultiplicativeOperator; |
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95 //! [7] //! [8] |
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96 bool waitingForOperand; |
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97 //! [8] |
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98 |
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99 //! [9] |
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100 QLineEdit *display; |
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101 //! [9] //! [10] |
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102 |
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103 enum { NumDigitButtons = 10 }; |
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104 Button *digitButtons[NumDigitButtons]; |
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105 }; |
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106 //! [10] |
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107 |
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108 #endif |