Seamly2D
Code documentation
calculator.h
Go to the documentation of this file.
1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the examples of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:BSD$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** BSD License Usage
18 ** Alternatively, you may use this file under the terms of the BSD license
19 ** as follows:
20 **
21 ** "Redistribution and use in source and binary forms, with or without
22 ** modification, are permitted provided that the following conditions are
23 ** met:
24 ** * Redistributions of source code must retain the above copyright
25 ** notice, this list of conditions and the following disclaimer.
26 ** * Redistributions in binary form must reproduce the above copyright
27 ** notice, this list of conditions and the following disclaimer in
28 ** the documentation and/or other materials provided with the
29 ** distribution.
30 ** * Neither the name of The Qt Company Ltd nor the names of its
31 ** contributors may be used to endorse or promote products derived
32 ** from this software without specific prior written permission.
33 **
34 **
35 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46 **
47 ** $QT_END_LICENSE$
48 **
49 ****************************************************************************/
50 
51 #ifndef CALCULATOR_H
52 #define CALCULATOR_H
53 
54 #include <QWidget>
55 
56 //QT_BEGIN_NAMESPACE
57 class QLineEdit;
58 //QT_END_NAMESPACE
59 class Button;
60 
61 QT_WARNING_PUSH
62 QT_WARNING_DISABLE_GCC("-Weffc++")
63 QT_WARNING_DISABLE_GCC("-Wnon-virtual-dtor")
64 
65 //! [0]
66 class CalculatorUtil : public QWidget
67 {
68  Q_OBJECT
69 
70 public:
71  explicit CalculatorUtil(QWidget *parent = nullptr);
72  virtual ~CalculatorUtil();
73 
74 private slots:
75  void digitClicked();
76  void unaryOperatorClicked();
77  void additiveOperatorClicked();
78  void multiplicativeOperatorClicked();
79  void equalClicked();
80  void pointClicked();
81  void changeSignClicked();
82  void backspaceClicked();
83  void clear();
84  void clearAll();
85  void clearMemory();
86  void readMemory();
87  void setMemory();
88  void addToMemory();
89 //! [0]
90 
91 //! [1]
92 private:
93 //! [1] //! [2]
94  Button *createButton(const QString &text, const char *member);
95  void abortOperation();
96  bool calculate(double rightOperand, const QString &pendingOperator);
97 //! [2]
98 
99 //! [3]
100  double sumInMemory;
101 //! [3] //! [4]
102  double sumSoFar;
103 //! [4] //! [5]
104  double factorSoFar;
105 //! [5] //! [6]
107 //! [6] //! [7]
109 //! [7] //! [8]
111 //! [8]
112 
113 //! [9]
114  QLineEdit *display;
115 //! [9] //! [10]
116 
117  enum { NumDigitButtons = 10 };
118  Button *digitButtons[NumDigitButtons];
119 };
120 //! [10]
121 
123 
124 #endif
[0]
Definition: button.h:58
double sumInMemory
[2]
Definition: calculator.h:100
QString pendingMultiplicativeOperator
[6] //! [7]
Definition: calculator.h:108
bool waitingForOperand
[7] //! [8]
Definition: calculator.h:110
double sumSoFar
[3] //! [4]
Definition: calculator.h:102
QString pendingAdditiveOperator
[5] //! [6]
Definition: calculator.h:106
QLineEdit * display
[8]
Definition: calculator.h:114
double factorSoFar
[4] //! [5]
Definition: calculator.h:104