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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 CONNECTION_H |
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43 #define CONNECTION_H |
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44 |
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45 #include <QMessageBox> |
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46 #include <QSqlDatabase> |
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47 #include <QSqlError> |
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48 #include <QSqlQuery> |
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49 |
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50 /* |
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51 This file defines a helper function to open a connection to an |
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52 in-memory SQLITE database and to create a test table. |
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53 |
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54 If you want to use another database, simply modify the code |
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55 below. All the examples in this directory use this function to |
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56 connect to a database. |
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57 */ |
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58 //! [0] |
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59 static bool createConnection() |
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60 { |
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61 QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE"); |
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62 db.setDatabaseName(":memory:"); |
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63 if (!db.open()) { |
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64 QMessageBox::critical(0, qApp->tr("Cannot open database"), |
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65 qApp->tr("Unable to establish a database connection.\n" |
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66 "This example needs SQLite support. Please read " |
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67 "the Qt SQL driver documentation for information how " |
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68 "to build it.\n\n" |
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69 "Click Cancel to exit."), QMessageBox::Cancel); |
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70 return false; |
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71 } |
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72 |
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73 QSqlQuery query; |
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74 query.exec("create table person (id int primary key, " |
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75 "firstname varchar(20), lastname varchar(20))"); |
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76 query.exec("insert into person values(101, 'Danny', 'Young')"); |
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77 query.exec("insert into person values(102, 'Christine', 'Holand')"); |
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78 query.exec("insert into person values(103, 'Lars', 'Gordon')"); |
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79 query.exec("insert into person values(104, 'Roberto', 'Robitaille')"); |
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80 query.exec("insert into person values(105, 'Maria', 'Papadopoulos')"); |
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81 |
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82 query.exec("create table offices (id int primary key," |
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83 "imagefile int," |
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84 "location varchar(20)," |
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85 "country varchar(20)," |
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86 "description varchar(100))"); |
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87 query.exec("insert into offices " |
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88 "values(0, 0, 'Oslo', 'Norway'," |
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89 "'Oslo is home to more than 500 000 citizens and has a " |
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90 "lot to offer.It has been called \"The city with the big " |
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91 "heart\" and this is a nickname we are happy to live up to.')"); |
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92 query.exec("insert into offices " |
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93 "values(1, 1, 'Brisbane', 'Australia'," |
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94 "'Brisbane is the capital of Queensland, the Sunshine State, " |
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95 "where it is beautiful one day, perfect the next. " |
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96 "Brisbane is Australia''s 3rd largest city, being home " |
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97 "to almost 2 million people.')"); |
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98 query.exec("insert into offices " |
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99 "values(2, 2, 'Redwood City', 'US'," |
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100 "'You find Redwood City in the heart of the Bay Area " |
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101 "just north of Silicon Valley. The largest nearby city is " |
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102 "San Jose which is the third largest city in California " |
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103 "and the 10th largest in the US.')"); |
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104 query.exec("insert into offices " |
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105 "values(3, 3, 'Berlin', 'Germany'," |
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106 "'Berlin, the capital of Germany is dynamic, cosmopolitan " |
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107 "and creative, allowing for every kind of lifestyle. " |
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108 "East meets West in the metropolis at the heart of a " |
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109 "changing Europe.')"); |
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110 query.exec("insert into offices " |
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111 "values(4, 4, 'Munich', 'Germany'," |
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112 "'Several technology companies are represented in Munich, " |
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113 "and the city is often called the \"Bavarian Silicon Valley\". " |
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114 "The exciting city is also filled with culture, " |
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115 "art and music. ')"); |
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116 query.exec("insert into offices " |
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117 "values(5, 5, 'Beijing', 'China'," |
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118 "'Beijing as a capital city has more than 3000 years of " |
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119 "history. Today the city counts 12 million citizens, and " |
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120 "is the political, economic and cultural centre of China.')"); |
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121 |
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122 query.exec("create table images (locationid int, file varchar(20))"); |
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123 query.exec("insert into images values(0, 'images/oslo.png')"); |
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124 query.exec("insert into images values(1, 'images/brisbane.png')"); |
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125 query.exec("insert into images values(2, 'images/redwood.png')"); |
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126 query.exec("insert into images values(3, 'images/berlin.png')"); |
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127 query.exec("insert into images values(4, 'images/munich.png')"); |
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128 query.exec("insert into images values(5, 'images/beijing.png')"); |
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129 |
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130 |
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131 |
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132 return true; |
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133 } |
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134 //! [0] |
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135 |
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136 #endif |