(eBook - PDF) - Trolltech - Databases With Qt (en Us)

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Transcript of (eBook - PDF) - Trolltech - Databases With Qt (en Us)

Page 1: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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Page 2: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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Page 3: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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#include <qapplication.h>#include <qsqldatabase.h>#include "../login.h"

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

QSqlDatabase *defaultDB = QSqlDatabase::addDatabase( DB_SALES_DRIVER );if ( defaultDB ) {

defaultDB->setDatabaseName( DB_SALES_DBNAME );defaultDB->setUserName( DB_SALES_USER );defaultDB->setPassword( DB_SALES_PASSWD );defaultDB->setHostName( DB_SALES_HOST );

if ( defaultDB->open() ) {// Database successfully opened; we can now issue SQL commands.

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}}

return 0;}

d ä�ïEø©õkæ4e f+ï"P�å�äZP]è�å[gNf+ñ�ïEì�ì�å�ñHîih&f+ø^ó]è�ì�ü$ñkjlj���$�2-H�Qb"%F@ � �.�$1�@0�.%D�.��%J3�����10%���à� � @0#$#��$A��a>�)�ã]#��Q@0�.@0à�@E-�%M�Z� @03B3��Q@0�.@0à�@0-H%M�[��=4��@E-�-H��AB���&�B%DA�@EIJ%D�M/�.��%D3B�2�$1�%��9bY%DbY�$-�� �&NB-�%PMW��Q�.���$- � �A�AB% � �.���A4*4'¤�X�.��%^�&�$IJ%G�M b"�����.�$A��J�.��%G@E1�@0�$#$@0à�#$%^3B�2�$1�%��2-U@E�2%M�/> 7 �<�� � � 7 ��%�Am�L@E�&@Eà�@0-H%°��ABA�% � �&�$1��$�& ��=> 7 �T � � 7 ��@ � #�%���=Z> ! �Q)Nno�.)� �à�@0-H%G'+3�@E���&�$1�%^)�%��210%��Õ@EA�3�\F� � ���-��M&� )�> 8 )�%��21�%0����=Z>���)�> 8 nm�[�0�-H�&���2%0)�> 8Tp @EA�3qn��9@0AB3>�\FâZ)�> 8l� �.\C �)�> 8 �0*ESQ��.%G�.��@E�4-��IJ%^�M �.��%�-H%G3B�2�$1�%���-Q@E�2%�ABß �4�$A � #$N�3B%�3���A��.��%^>9�@���2%�% ; 3B���.���AB=6#���K(@E�X�&�B% 54; '��Q\ ;�?#$%�-ÕM&��+3B%��.@0�$#�-e*! �B% � �A�AB% � �.�$�AJb"�B� � �J��- � ��%�@0�.%�3(à�% � �IJ%0-X�&�B%"@E����#$� � @0�.���ABß -/3B%�MW@EN�#$�¤3�@E�&@Eà�@0-H% � �A�AB% � �.�$�AJ@0A�3Fb"�$#$#�à�%YN�-H%�3Jà� Y�&�B%Y>9�)�> 8 � #�@E-�-H%�-Õ�$M6A�^��&�B%��43�@E�&@Eà�@0-H%"�$-Õ-H��% � ���?%�34*)�% � �AB3PbY% � @E#�#�-H%��[�L@E�&@Eà�@0-H%�SU@0IJ%M�[��=]-H%��.RL-H%��2SU@EIJ%M�[��=E-H%��[��@0-H-Hb"���3��[�L@0A�3(-H%��.<9�-��.SU@0IJ%M�[�Õ�&°�$A��$�.��@E#���r,%"�.��% � �ABA�% � �&�$�A�$A�M&��2IJ@E�&�$�A+*]SU��.%~�&�B@0�BMW���.��%~> 7 �T � � 7 �2@ � #$%��43�����1�%0�¤�&�B% ! SU)°)�%���1�� � %~SU@0IJ%9�B@0-4�."à�%���@0-H-�%03G�."-H%��[�L@E�&à�@E-�%0SQ@EIJ%M�[�0*! �B����3(b"% � @E#�#����%�A��[�X�.G���%0A^�.��%d3�@0�.@0à�@E-�%"@0AB3(�E�$1�%"N�-X@ �k� %�-H-/�.°�.��%�3B@0�.@?*]T&MZ�&�B��- � @E#�#�MW@0�$#$-/���ZbY�$#�#���%��.N��2A��k' 8 ) ;ts %����2���$A�M&��2IJ@E�&�$�A � @EAJà�%"3B%��.%��2IJ�$A�%�3(NB-��$A��^>9)�ã]#��Q@0�.@0à�@E-�%t�k� #$@0-H� ; �2����u�[�0*

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#include <qapplication.h>#include <qsqldatabase.h>#include "../login.h"

bool createConnections();

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( createConnections() ) {// Databases successfully opened; get pointers to them:QSqlDatabase *oracledb = QSqlDatabase::database( "ORACLE" );// Now we can now issue SQL commands to the oracle connection// or to the default connection

}

return 0;}

bool createConnections(){

// create the default database connectionQSqlDatabase *defaultDB = QSqlDatabase::addDatabase( DB_SALES_DRIVER );if ( ! defaultDB ) {

qWarning( "Failed to connect to driver" );return FALSE;

}defaultDB->setDatabaseName( DB_SALES_DBNAME );defaultDB->setUserName( DB_SALES_USER );

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=�>@?BADCFE�G�HJI p

defaultDB->setPassword( DB_SALES_PASSWD );defaultDB->setHostName( DB_SALES_HOST );if ( ! defaultDB->open() ) {

qWarning( "Failed to open sales database: " +defaultDB->lastError().driverText() );

qWarning( defaultDB->lastError().databaseText() );return FALSE;

}

// create a named connection to oracleQSqlDatabase *oracle = QSqlDatabase::addDatabase( DB_ORDERS_DRIVER, "ORACLE" );if ( ! oracle ) {

qWarning( "Failed to connect to oracle driver" );return FALSE;

}oracle->setDatabaseName( DB_ORDERS_DBNAME );oracle->setUserName( DB_ORDERS_USER );oracle->setPassword( DB_ORDERS_PASSWD );oracle->setHostName( DB_ORDERS_HOST );if ( ! oracle->open() ) {

qWarning( "Failed to open orders database: " +oracle->lastError().driverText() );

qWarning( oracle->lastError().databaseText() );return FALSE;

}

return TRUE;}

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#include <qapplication.h>#include <qsqldatabase.h>#include <qsqlquery.h>#include "../login.h"

bool createConnections();

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( createConnections() ) {QSqlDatabase *oracledb = QSqlDatabase::database( "ORACLE" );// Copy data from the oracle database to the ODBC (default)// databaseQSqlQuery target;QSqlQuery query( "SELECT id, name FROM people;", oracledb );if ( query.isActive() ) {

while ( query.next() ) {target.exec( "INSERT INTO people ( id, name ) VALUES ( " +

query.value(0).toString() +", ’" + query.value(1).toString() + "’ );" );

}}

}

return 0;}

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�.P�2%��.�2�$%�1�%"�2% � ��23B-/MW���I *��6��&�J�.��%Y3B@0�.@0à�@0-H% � �ABA�% � �&�$�A�-/bY%���%Y-�%��N��(��AF�&�B% � �2%�@E�&%0��A�AB% � �.�$�A�-��[�ÕMWNBA � �&�$�AJbY%"bY����&%%0@0�2#$�$%��|*'MW�.%�� � ��%�@0�.��AB� �.��%���AB���.��@E#

SELECT-��.@0�.%�IJ%�AB�&=L��-H' � �&�$1�%M�[�^��- � �B% � K�%�3Ì�&`-�%0%��$MU�&�B%Cã]NB%��2 �%�OE% � NB�&%�3Ì-HN �k� %�-H-�M&N�#$#� }* ! ��%

AB%�O0�"�[�~MWNBA � �&�$�A���-UN�-H%�3��.D���.%���@0�.%°�&�B�2�NB�E���&�B%°ã]N�%��� ^��%�-HN�#$�&-e* ! ��%^1�@0#$N�%t�[�9MWNBA � �.�$�AC��%��&NB�2AB-Q�.��% � �A��.%�AB�&-U�M��B%�#$3�-U@E->�!?@0����@EA��.-,* ! �B%J��AB-�%0�2�.���AB-�@0��%J@ � ���$%�1�%�3aà� � �2%�@E�&�$A���@0AB3 %�O0% � N��.�$A��Fã]NB%��2�$%�-�@E�E@E��AB-��Q�.��%J3�%0MW@0NB#��L3�@E�&@Eà�@0-H%JN�-H��AB�C�.��%target

>9)�ã]#$>9N�%0�2 }*

int count = 0;if ( query.isActive() ) {

while ( query.next() ) {target.exec( "INSERT INTO people ( id, name ) VALUES ( " +

query.value(0).toString() +", ’" + query.value(1).toString() + "’ );" );

if ( target.isActive() )

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count += target.numRowsAffected();}

}

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int main( int argc, char *argv[] ){

QApplication app( argc, argv );

int rows = 0;

if ( createConnections() ) {QSqlQuery query( "INSERT INTO staff ( id, forename, surname, salary ) "

"VALUES ( 1155, ’Ginger’, ’Davis’, 50000 );" );if ( query.isActive() ) rows += query.numRowsAffected() ;

query.exec( "UPDATE staff SET salary=60000 WHERE id=1155;" );if ( query.isActive() ) rows += query.numRowsAffected() ;

query.exec( "DELETE FROM staff WHERE id=1155;" );if ( query.isActive() ) rows += query.numRowsAffected() ;

}

return ( rows == 3 ) ? 0 : 1;}

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if ( createConnections() ) {QSqlQuery query( "SELECT id, name FROM people ORDER BY name;" );if ( ! query.isActive() ) return 1; // Query failedint i;i = query.size(); // In this example we have 9 records; i == 9.query.first(); // Moves to the first record.

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i = query.at(); // i == 0query.last(); // Moves to the last record.i = query.at(); // i == 8query.seek( query.size() / 2 ); // Moves to the middle record.i = query.at(); // i == 4

}

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QSqlDatabase* defaultDB = QSqlDatabase::database();if ( defaultDB->driver()->hasFeature( QSqlDriver::QuerySize ) ) {

// QSqlQuery::size() supported}else {

// QSqlQuery::size() cannot be relied upon}

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if ( createConnections() ) {QSqlQuery query( "SELECT id, surname FROM staff;" );if ( query.isActive() ) {

while ( query.next() ) {qDebug( query.value(0).toString() + ": " +

query.value(1).toString() );}

}}

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#include <qapplication.h>#include <qsqldatabase.h>#include <qsqlcursor.h>#include "../login.h"

bool createConnections();

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( createConnections() ) {QSqlCursor cur( "staff" ); // Specify the table/view namecur.select(); // We’ll retrieve every recordwhile ( cur.next() ) {

qDebug( cur.value( "id" ).toString() + ": " +cur.value( "surname" ).toString() + " " +cur.value( "salary" ).toString() );

}}

return 0;}

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SELECT staff.id, staff.forename, staff.surname, staff.salary, staff.statusid FROM staff

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cur.select( "id > 100" );

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SELECT staff.id, staff.forename, staff.surname, staff.salary, staff.statusidFROM staff WHERE staff.id > 100

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QSqlCursor cur( "staff" );QSqlIndex nameIndex = cur.index( "surname" );cur.select( nameIndex );

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cur.select( "surname LIKE ’A%’", nameIndex );

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QSqlCursor cur( "staff" );QStringList fields = QStringList() << "surname" << "forename";QSqlIndex order = cur.index( fields );cur.select( order );while ( cur.next() ) {

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SELECT staff.id, staff.forename, staff.surname, staff.salary, staff.statusidFROM staff ORDER BY staff.surname ASC, staff.forename ASC

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QSqlCursor cur( "staff" );QStringList fields = QStringList() << "id" << "forename";QSqlIndex order = cur.index( fields );QSqlIndex filter = cur.index( "surname" );cur.setValue( "surname", "Bloggs" );cur.select( filter, order );while ( cur.next() ) {

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SELECT staff.id, staff.forename, staff.surname, staff.salary, staff.statusidFROM staff WHERE staff.surname=’Bloggs’ ORDER BY staff.id ASC, staff.forename ASC

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QSqlCursor cur( "creditors" );QStringList orderFields = QStringList() << "surname" << "forename";QSqlIndex order = cur.index( orderFields );

QStringList filterFields = QStringList() << "surname" << "city";QSqlIndex filter = cur.index( filterFields );cur.setValue( "surname", "Chirac" );cur.setValue( "city", "Paris" );

cur.select( filter, order );

while ( cur.next() ) {int id = cur.value( "id" ).toInt();QString name = cur.value( "forename" ).toString() + " " +

cur.value( "surname" ).toString();qDebug( QString::number( id ) + ": " + name );

}

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SELECT creditors.city, creditors.surname, creditors.forename, creditors.idFROM creditorsWHERE creditors.surname = ’Chirac’ AND creditors.city = ’Paris’ORDER BY creditors.surname ASC, creditors.forename ASC

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QSqlCursor cur( "prices" );QStringList names = QStringList() <<

"Screwdriver" << "Hammer" << "Wrench" << "Saw";int id = 20;for ( QStringList::Iterator name = names.begin();

name != names.end(); ++name ) {QSqlRecord *buffer = cur.primeInsert();buffer->setValue( "id", id );buffer->setValue( "name", *name );buffer->setValue( "price", 100.0 + (double)id );count += cur.insert();id++;

}

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à� (3B%��2�$1�%�3 � #$@0-H-H%�-,*~)�%�%(>9)�ã]#$�N���-���L�0*QSU%�O0�XbY% � @E#�#¤-H%��ª!?@E#�NB%M�[�dM&��L%0@ � �9�?%�#$3��&�B@0�X�2%0ã�NB����%�-9@(1�@E#�NB%B*����$A�@0#$#$ Jb"% � @E#�#�$A�-H%������[�Q�&^��AB-�%0�2�¤�.��%"�2% � ��234* ! ��%"��AB-�%0�2�"�[� � @E#�#B�2%��.N���A�-/�.��%"A�NBIJà�%��X�MZ�2�bY-/�$A�-H%��2�.%�34*_J%(�à��.@0�$A�%�3�@(����$A��.%��U�&C@(>9)�ã]# 5 % � ���3��àu¡|% � �4M&�2�I �.��%^���2�$IJ%�T&A�-H%��2�"�[� � @E#�#�*U>9)�ã�# 5 % � ��23��àu¡.% � �&- � @0A����#$3a�.��%G3B@0�.@M&��/@G-H�$A���#�%°��% � ���3D��#$N�-Q-��IJ%cIJ%0�&@Eé�3�@E�&@^@0à��N�� �&�B%c�2% � ��234*�T&AF����@ � �&� � %cIJ�-H��$A��.%��2@ � �.���AFb"�$�.�F@°>9)�ã�# 5 % � ��23 � �A�-H��-H�.-�M6-H�$IJ��#�%Y1�@E#�NB%M�[�Q@0A�3J-H%��ª!?@E#�NB%M�[� � @0#$#�-L@0-L-��B�b"AJ�$AJ�.���$-/@0AB3J�&�B%"M&�#�#$�bY��AB�G%�OE@0IJ��#$%B*

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QSqlCursor cur( "prices" );cur.select( "id=202" );if ( cur.next() ) {

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=�>@?BADCFE�G�HJI � K

QSqlRecord *buffer = cur.primeUpdate();double price = buffer->value( "price" ).toDouble();double newprice = price * 1.05;buffer->setValue( "price", newprice );cur.update();

}

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QSqlQuery query( "UPDATE prices SET price = price * 1.05" );

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QSqlCursor cur( "prices" );cur.select( "id=999" );if ( cur.next() ) {

cur.primeDelete();cur.del();

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QSqlQuery query( "DELETE FROM prices WHERE id >= 2450 AND id <= 2500" );

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#include <qapplication.h>#include <qsqldatabase.h>#include <qsqlcursor.h>#include <qdatatable.h>#include "../login.h"

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bool createConnections();

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( createConnections() ) {QSqlCursor staffCursor( "staff" );QDataTable *staffTable = new QDataTable( &staffCursor, TRUE );app.setMainWidget( staffTable );staffTable->refresh();staffTable->show();

return app.exec();}

return 0;}

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QSqlCursor staffCursor( "staff" );QDataTable *staffTable = new QDataTable( &staffCursor );

app.setMainWidget( staffTable );

staffTable->addColumn( "forename", "Forename" );staffTable->addColumn( "surname", "Surname" );staffTable->addColumn( "salary", "Annual Salary" );

QStringList order = QStringList() << "surname" << "forename";staffTable->setSort( order );

staffTable->refresh();staffTable->show();

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Page 16: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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v � z��M|4}�xB~§���M|4�@·º¸y�c� � z9»�w �¬¼ �

� �2%�@E�&�$A��P3�@E�&@Eé�@0bY@E�2%°M&��2IJ-/�$-LIJ���%c��AB1��#$1�%�3D�.��@EAFN�-H�$A��P3�@0�.@0éW@0bY@0��%°�&@Eà�#�%0-Õà�% � @0N�-H%cbY%cIJN�-H� �.@0K�% � @E�2%c�M6%�@ � �/�B%�#$3�$A�3B��10��3BN�@0#$#$ }*Q\F�-H�+�M+�.��% � �3�%Pà�%�#$�b � @0A�à�%^@0N��.�IJ@0�.� � @0#$#$ P��%�AB%��2@E�&%�3�à� $QîBòdå.õxè ��ì�å�äk*/)�%�%P�&�B%TUîBòdå.õkè ��ì�å�äLIJ@0ABN�@0#M&��XIJ��2%"3�%��.@0�$#$-,*

£U¦p¨kÓ?�p¬�Æ�¦p´5«F¬(²+�]µe�B¥��

#include <qapplication.h>#include <qdialog.h>#include <qlabel.h>#include <qlayout.h>#include <qlineedit.h>#include <qsqldatabase.h>#include <qsqlcursor.h>#include <qsqlform.h>#include "../login.h"

bool createConnections();

class FormDialog : public QDialog{

public:FormDialog();

};

FormDialog::FormDialog(){

QLabel *forenameLabel = new QLabel( "Forename:", this );QLabel *forenameDisplay = new QLabel( this );QLabel *surnameLabel = new QLabel( "Surname:", this );QLabel *surnameDisplay = new QLabel( this );QLabel *salaryLabel = new QLabel( "Salary:", this );QLineEdit *salaryEdit = new QLineEdit( this );

QGridLayout *grid = new QGridLayout( this );grid->addWidget( forenameLabel, 0, 0 );grid->addWidget( forenameDisplay, 0, 1 );grid->addWidget( surnameLabel, 1, 0 );grid->addWidget( surnameDisplay, 1, 1 );grid->addWidget( salaryLabel, 2, 0 );grid->addWidget( salaryEdit, 2, 1 );grid->activate();

QSqlCursor staffCursor( "staff" );staffCursor.select();staffCursor.next();

QSqlForm sqlForm( this );sqlForm.setRecord( staffCursor.primeUpdate() );sqlForm.insert( forenameDisplay, "forename" );sqlForm.insert( surnameDisplay, "surname" );sqlForm.insert( salaryEdit, "salary" );sqlForm.readFields();

}

Page 17: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( ! createConnections() ) return 1;

FormDialog *formDialog = new FormDialog();formDialog->show();app.setMainWidget( formDialog );

return app.exec();}

d ä�ïEø©õkæ4e f+ï"P�å�äZP]è�å[gNf�7kï0äHø�hLf+øPó]è�ì�ü�ñZjlj_J%"�$A � #$N�3B%d�.��%���%�@E3�%��N�B#$%�-XMW�� �&�B%�bY�$3���%��&-4�.��@E�?bY%dA�%�%�34*�_J%d@E#�-H°�$A � #�NB3�%"ã�-Hã]#�3B@0�.@0à�@E-�%B* �(@0AB3^ã]-Hã�# � NB�2-H��|* �P@0-XN�-HN�@E#�=à�NB�¤bY%YA��b @E3�3Jã]-Hã�#$MW���I * �4*! �B%dM&��2I¼bY�$#�#�à�%d����%�-H%�A��.%�3G@E-/@Y3��$@0#$��°-HGbY%d-HN�à � #�@E-�-Õ>��L�$@0#$��cbY���.�(�N��4�bYA��e��2I$�Q��@E#��� � #$@0-H-e*�_J%"N�-H%d@c> 8 �$A�% ; 3��$�M&��X�&�B%d-H@0#$@0�� c-�P�.��@0�6�.��%YNB-�%�� � @0A � ��@0AB�E%Y�$� *�' #$#��.��%"bY��3B�E%0�&-L@0�2%"#$@0�$3D�N��¤bY�$�&�J@c���2�$3+*_J% � �2%�@E�&%Y@ � NB�2-H��X�A(�&�B%"-H�.@0MWMZ�.@0à�#$%�=�-H%�#$% � �¤@E#�#B�2% � ��23B-X@0A�3FIJ�1�%d�.P�&�B%#�?�2-H�6�2% � ��234*SU�bÐbY% � �2%�@E�&%F@�>�)�ã]#��e���I �àu¡.% � �L@EA�3 -�%��U�.��%D>�)�ã]#��e���IJß -"�2% � ��23 à�NBMWM&%����.a�&�B% � N��2-H��2ß -dNB��3�@E�&%Cà�N�M&MW%���*��e���%�@ � �bY�$3���%��4�&�B@0�+bY%°bY��-H�C�.JIJ@0K�%G3B@0�.@0é�@EbY@0�2%Gb"%^��AB-�%0�2�+@^����$A��.%��L�&J�.��%°bY�$3���%��+@0A�3��.��%°@E-�-H � �$@0�.%�3m�B%�#$3FAB@0IJ%^��AB�&J�.��%>�)�ã]#��e���I *�����AB@0#$#� cbY% � @E#�#���%�@03M����%0#�3B-��[�L�&^�����N�#$@0�.%"�&�B%dbY�$3���%��&-Õb"�$�.�P3B@0�.@cMW���I¼�&�B%d3B@0�.@0à�@E-�%Y1��$@c�&�B% � N���-����ß -Xà�N�M&MW%���*

£U¦p¨kÓ?�p¬�Æ�¦p´5«F¬(²+�]µe�B¥��C¦p´a¬P£U¬�­�¬JÅE�B¥�Î>)�L@E�&@1!X�$%�b ��-"@D_a�$3���%��Q�&�B@0� � @0A �B�#�3 @F�2%0@03�éW�A�#$ J>9)�ã]#��e���I *"TWA @E3�3B���.���A �&�>9)�ã]#��e��2I ���Q�MWM&%��2-��&�B%P-H#$��L��%�MW��%�-��½�>�)�ã]# 5 % � ��23$¾Y�Q-�P�$� � @EAJ%�@0-H��#$ cà�%Y#��$A�K�%�3J�.��E%0�&�B%��4b"�$�.�J@c>��L@E�&@ ! @Eà�#�%"�&^3��$-���#�@E c@c3�%��.@0�$#�#$%�3D10��%�b��MZ@c�2% � ��23��

connect( myDataTable, SIGNAL( currentChanged( QSqlRecord* ) ),myDataView, SLOT( refresh( QSqlRecord* ) ) );

ÄZ�Z¦p­�¦p´5«F¬(²+�]µe�B¥��! �B��-Õ%�O0@EIJ��#�%Y�$-/-H��IJ�$#�@E�/�.^�.��%"���2%01����NB-/�A�%Y-H^bY%YbY��#$#�M& � NB-/�AJ�&�B%d3B��M&MW%���%�A � %�-e*

class FormDialog : public QDialog{

Q_OBJECTpublic:

FormDialog();~FormDialog();

public slots:void save();

private:QSqlCursor staffCursor;QSqlForm *sqlForm;QSqlIndex idIndex;

};

d ä�ïEø©õkæ4e f+ï"P�å�äZP]è�å[gNf�7kï0äHø���f+øPó]è�ì�ü�û! �B%d-H@010%"-H#$��6b"�$#$#�à�%"N�-H%�3(MW��4@Yà�N��.�&�A(�.��@0�6�.��%dN�-H%�� � @EA(���2%�-H-/�. � �AM�B��I �.��%��$�4N���3B@0�.%B*]_J%"@0#$-�P���#$3(����$A��.%��2-X�.G�.��%>�)�ã]#�� N��2-H��/@EA�3J�.��%Y>9)�ã]#��e��2I -H�$A � %Y�.��%� YbY�$#�#BA�%�%�3(�.^à�%Y@ �}� %0-�-H%�3J�N��.-H��3B%"�.��% � �AB-��.�2N � �.��|*

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=�>@?BADCFE�G�HJI ���

staffCursor.setTrimmed( "forename", TRUE );staffCursor.setTrimmed( "surname", TRUE );

_J% � @0#$#�-H%�� ! ����IJIJ%03��[�/�AJ�.��%"�&%0O0�5�?%�#�3B-/-HP�.��@E�6@0AB c-���@ � %�-ÕN�-H%�3J�&P�2�$�����¤��@E3J�&�B%#�?%�#$3�-/@E�2%Y�2%0IJ�1�%�3(bY��%�AJ�.��%a�B%0#�3B-@E�2%Y�2%0�&����%�10%�3+*���2���%����&�$%�-4�.��@0�6bY%dIJ�������6bY�$-��J�.°@0����#� "�.��B%0#�3B-�=�-HN � �(@0-X@0#$�$�EABIJ%�A��¤@EA�3(1�@E#��$3�@E�&�$�A(@0�2%"@ � ���$%�1�%�3(�$A(�&�B% � �AB1�%�AB�&�$�A�@E#bY@E �=�MW��4%�OE@0IJ��#$%�=�à� � @E#�#$�$A��P> 8 �$A�% ; 3B���"�k� -H%��.' #$����A�IJ%0A��+@0A�3J> 8 �$A�% ; 3��$�"�k� -H%��°!Z@0#$��3B@0�.��|*

QLineEdit *forenameEdit = new QLineEdit( this );

QPushButton *saveButton = new QPushButton( "&Save", this );connect( saveButton, SIGNAL(clicked()), this, SLOT(save()) );

! �B%o�e��2I$�Q�$@0#$�� � �A�-H�&��N � �.����$-Y-��$IJ�$#�@E�d�.a�&�B%D�A�%F��A �&�B%D����%�1��$�N�-"%�O0@EIJ��#�%?*G_J%C��@E1�% � �B@0AB�E%�3 �.��%DM&��2%�AB@0IJ%J@0AB3-HN���A�@EIJ%PbY�$3���%��.-9�&C> 8 ��AB% ; 3B���.-~�.FIJ@0K�%P�&�B%�I %�3B���.@0à�#$%P@0A�3��B@01�%(@03B3�%�3�@(>���NB-��M�6N��.�&�A��.��%PN�-H%�� � @EA � #$� � KD�&C-�@E1�%�.��%0���XNB��3�@E�&%�-e*

grid->addWidget( saveButton, 3, 0 );

_J%Y@E3�3J@0AF%�O0�.�2@Y�2�b �&P�&�B%d���2�$3 � �A��.@0�$A��$A��G�.��%"-H@01�%Yà�N��.�.�A+*

idIndex = staffCursor.index( "id" );staffCursor.select( idIndex );staffCursor.first();

_J% � �2%0@0�.%c@G>9)�ã]#$TWAB3�%�O°�àu¡|% � � @0AB3F�.��%�AD%0O0% � N��.%c@G-H%�#�% � �"�[�QNB-��$A��(�.��%c�$A�3B%�O?*Z_J%G�&�B%�ADIJ�1�%c�.(�&�B%`�B��-�� �2% � ��23D�$AF�.��%��%�-HN�#$�-H%�� *

sqlForm = new QSqlForm( this );sqlForm->setRecord( staffCursor.primeUpdate() );

_J% � �2%�@E�&%Y@cA�%0b >9)�ã]#��e��2IÉ�àu¡.% � �6@0A�3J-H%��¤�$�.ß -/��% � ���3Pà�NBMWM&%��4�&^�&�B% � N���-����ß -XN���3�@0�.%Yà�N�M&MW%���*

sqlForm->insert( forenameEdit, "forename" );sqlForm->insert( surnameEdit, "surname" );sqlForm->insert( salaryEdit, "salary" );sqlForm->readFields();

SU�b¼bY%°#$�$A�KJ�.��%Gà�NBMWM&%��2ß -��?%�#$3�-U�&J�.��%^> 8 ��AB% ; 3B��� � �A��.�2�#$-,*y�.T&AC�.��%^���2%�10���NB-L%�OE@0IJ��#$%GbY%^#��$A�K�%�3��&�B% � NB�2-H��2ß -<�?%�#$3�-e* �! �B%Y%�3��$� � �AB�&���#�-/@E�2%Y�����NB#�@E�&%03Pà� Y�.��%Y�2%0@03����$%�#$3�-��[� � @0#$#�@0-Õà�%�MW���%B*

FormDialog::~FormDialog(){

}

T&Aa�&�B%^3B%�-H�&��N � �.��Qb"%P3��ABß �X�B@01�%P�&CbY��2�2 ^@0à��NB�X�&�B%^bY�$3���%��&-���Q>�)�ã]#��e���I¹-��$A � %(�&�B%� ^@E�2% � �B��#$3���%�A��M+�.��%PMW���I¹@0AB3bY�$#�#?à�%"3�%�#$%��.%�3Jà� d>��¤@0�¤�.��%"�2�$�����¤�.��IJ%?*

void FormDialog::save(){

sqlForm->writeFields();staffCursor.update();staffCursor.select( idIndex );staffCursor.first();

}

Page 19: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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>�)�ã]#��e���I NB-�%�-^>9)�ã]#����2���%0�2�. �\F@E� �. ��@0AB3�#$%a�&�B%��&��@0A�-HMW%0�"�M~3B@0�.@ à�%��.bY%�%�A bY��3B�E%0�&-°@EA�3 3B@0�.@0à�@E-�%9�?%�#$3�-e* � N�-H�&�IbY�$3���%��.- � @0A�@0#$-�Fà�%°N�-H%�3F�$A�@GMW���IÐà� °�$A�-H�&@E#�#$��AB�D@G���2���%����& cIJ@E�D�.��@0� � �AB�&@E��AB-U��ABMW��2IJ@E�&�$�AD@Eà��N��+�&�B%°���2���%��2�.��%0-Õ�M�.��% � N�-H�&�I bY��3B�E%��b"�B� � �J-��B�N�#$3Jà�%YN�-H%�3J�&P�.�2@0AB-�M&%��4�&�B%d3B@0�.@?*! �B��-X%0O0@0IJ��#�%d��-Xà�@E-�%�3P�AP�&�B%�MW���I � %�OE@0IJ��#$%��$A(�&�B%�����%�1��$�N�-4-�% � �.���AP-�^bY%�bY��#$#��A�#$ � �1�%��+�.��%�3B��M&MW%���%�A � %�-+��%���%B* ! ��%M&N�#$#�-H�N�� � %Y��-L��AJ-Hã]# [��10%��21��$%�bL[ � NB-��.�I � [�IJ@E��A4* �J@EA�3D-Hã]# [��1�%0�21��$%�bL[ � NB-��.�I � [�IJ@0�$A+* � ���

class CustomEdit : public QLineEdit{

Q_OBJECTQ_PROPERTY( QString upperLine READ upperLine WRITE setUpperLine )public:

CustomEdit( QWidget *parent=0, const char *name=0 );QString upperLine() const;void setUpperLine( const QString &line );

public slots:void changed( const QString &line );

private:QString upperLineText;

};

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QSqlPropertyMap *propMap;

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CustomEdit::CustomEdit( QWidget *parent, const char *name ) :QLineEdit( parent, name )

{connect( this, SIGNAL(textChanged(const QString &)),

this, SLOT(changed(const QString &)) );}

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void CustomEdit::changed( const QString &line ){

setUpperLine( line );}

Page 20: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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void CustomEdit::setUpperLine( const QString &line ){

upperLineText = line.upper();setText( upperLineText );

}

! �B%9-H%��&RQ����%0� 8 ��AB%M�[�4MWN�A � �.���A^��#$@ � %0-+@EA^NB����%�� � @E-�% � ��� ��MB�&�B%9�.%�O0�B��AP�&�B%9N�����%�� 8 �$A�% ! %�O0�Bà�N�MWM&%��@EA�3P�&�B%�AG-H%��.- �.��%��&%�OE��M6�.��%"bY��3B�E%0�¤�&P�.���$-/�&%0O0��*7 N��Q�N�-H�.�I ; 3B��� � #$@0-H-9%�AB-�NB�2%�-U�.��@E� �.��%^�&%�OE� %0A��.%��2%�3C��-~@E#�bY@E �-~N�����%�� � @0-H%°@0AB3C�����1��$3�%�-U@P���2���%0�2�. °�&�B@0� � @EA�à�%GN�-H%�3bY�$�&�J@c���2���%����& "IJ@0�(�.G#$��ABKG� N�-H�&�I ; 3��$�¤�$A�-H�&@EA � %0-Õ3��$�2% � �.#� Y�.G3�@E�&@Eà�@0-H%Y�B%�#$3�-e*

CustomEdit *forenameEdit = new CustomEdit( this );

CustomEdit *surnameEdit = new CustomEdit( this );

_J%(NB-�%(�.��%P-�@EIJ%��e���I$�L�$@0#$��J@0-9bY%P3��$3aà�%�MW���%�=6à�N��X�.���$-~�.��IJ%(�2%0��#�@ � %P�&bYC�M+�.��%P> 8 ��AB% ; 3��$�Xb"�$3���%��.-9bY���.���N��U�bYA� N�-H�&�I ; 3��$�bY�$3���%��.-,*8 @0 0��AB�^�NB�6�&�B%"���2�$3J@0AB3J-�%0�&�.��AB�GNB�P�.��% � NB�2-H��X��-L�&�B%d-H@0IJ%Y@E-/à�%�MW���%B*

propMap = new QSqlPropertyMap;propMap->insert( forenameEdit->className(), "upperLine" );

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sqlForm = new QSqlForm( this );sqlForm->setRecord( staffCursor->primeUpdate() );sqlForm->installPropertyMap( propMap );

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±+�6¨}­��?Î Ä?�Z¦p­��?¥y ¦p�¬«��]­�¨9³.�B¥U��·E¬�¸B�p�]¨_J%^IJN�-H� ��%��$IJ��#��$IJ%�AB� >9)�ã�# ; 3��$�&��L�k@ � �.��2 c�.JN�-H% � NB-��.�IÐ%�3B���.��ÕbY�$3���%��&-Q�$AC�.@0à�#$%�-e*¤T&AC�.��%cM&�#�#$�bY��AB�P%0O0@0IJ��#�%°bY%°bY�$#�#� �2%�@E�&%(@ � N�-H�&�IÏ%�3B���.��Uà�@0-H%�3a�Aa>9��IJà�F�6�OJ@EA�3a@D>�)�ã]# ; 3��$�&��L�k@ � �.��2 P-�NBà � #$@0-H-��.C-H���bÉ���bÉ@D> ! @Eà�#�% � @EA N�-H%(@� N�-H�&�I %�3B���.��|*

class StatusPicker : public QComboBox{

Q_OBJECTQ_PROPERTY( int statusid READ statusId WRITE setStatusId )public:

StatusPicker( QWidget *parent=0, const char *name=0 );int statusId() const;void setStatusId( int id );

private:QMap index2id;

};

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class CustomSqlEditorFactory : public QSqlEditorFactory{

Q_OBJECTpublic:

QWidget *createEditor( QWidget *parent, const QSqlField *field );};

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StatusPicker::StatusPicker( QWidget *parent, const char *name ): QComboBox( parent, name )

{QSqlCursor cur( "status" );cur.select( cur.index( "name" ) );

int i = 0;while ( cur.next() ) {

insertItem( cur.value( "name" ).toString(), i );index2id[i] = cur.value( "id" ).toInt();i++;

}

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int StatusPicker::statusId() const{

return index2id[ currentItem() ];}

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void StatusPicker::setStatusId( int statusid ){

QMap::Iterator it;for ( it = index2id.begin(); it != index2id.end(); ++it ) {

if ( it.data() == statusid ) {setCurrentItem( it.key() );break;

}}

}

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Page 22: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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class CustomTable : public QDataTable{

Q_OBJECTpublic:

CustomTable(QSqlCursor *cursor, bool autoPopulate = FALSE,QWidget * parent = 0, const char * name = 0 ) :

QDataTable( cursor, autoPopulate, parent, name ) {}void paintField(

QPainter * p, const QSqlField* field, const QRect & cr, bool );

};

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void CustomTable::paintField( QPainter * p, const QSqlField* field,const QRect & cr, bool b)

{if ( !field )

return;if ( field->name() == "statusid" ) {

QSqlQuery query( "SELECT name FROM status WHERE id=" +field->value().toString() );

QString text;if ( query.next() ) {

text = query.value( 0 ).toString();}p->drawText( 2,2, cr.width()-4, cr.height()-4, fieldAlignment( field ), text );

}else {

QDataTable::paintField( p, field, cr, b) ;}

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@0AB3G#$��K�NB�°�&�B%~�&%0O0�.N�@0#E1�@0#$N�%�MW��¤�.��%~�$3°bY���.�G@�-��.�2@E������M&��2bY@0��3°>9)�ã]#$>9N�%��� }*�)�% � �A�3�#$ � @0#$#��.��%"-�NB��%�� � #$@0-H-/�&^��@EA�3�#$%Y��&�B%����B%�#$3�-e* ! �B%d#$@0-H� � ��@0AB�E%Y�$-/�$AJ�N��4IJ@0�$AJMWNBA � �.�$�AJb"�B%��2%dbY% � ��@EA���%"-H�.@0MWM ! @Eà�#�%dMW�2�Ià�%0��AB�G@c>��Q@0�.@ ! @0à�#$%d�.Gà�%��$A��^@c�NB-��.�I ! @Eà�#�%B*

' Ü _ Ý�. ] XNX+Þ:×/W (�')� . \ ÜFÙ5X+Ú(Ù

#include <qapplication.h>#include <qsqldatabase.h>#include <qsqlcursor.h>#include <qdatatable.h>

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=�>@?BADCFE�G�HJI ���

#include "../login.h"

bool createConnections();

int main( int argc, char *argv[] ){

QApplication app( argc, argv );

if ( createConnections() ) {QSqlCursor invoiceItemCursor( "invoiceitem" );

QDataTable *invoiceItemTable = new QDataTable( &invoiceItemCursor );

app.setMainWidget( invoiceItemTable );

invoiceItemTable->addColumn( "pricesid", "PriceID" );invoiceItemTable->addColumn( "quantity", "Quantity" );invoiceItemTable->addColumn( "paiddate", "Paid" );

invoiceItemTable->refresh();invoiceItemTable->show();

return app.exec();}

return 1;}

d ä�ïEø©õkæ4e f+ï"P�å�äZP]è�å[gNf�õkç�ôEñLe$ókõ�õ¦hLf+øPó]è$ì�ü�ñZj4j! �B��-�%�O0@EIJ��#�%P�$-91�%��� ^-H��IJ�$#$@0�~�.F�.��%P�&@Eà�#�% � %�OE@0IJ��#$%^���2%�-H%�A��.%�3�%�@0��#��$%���*L_J% � �2%�@E�&%^@ � NB�2-H���=¤@E3�3��.��%T�B%�#$3�-~@EA�3a�.��%��$�3B��-H��#$@0 c#$@0à�%�#$-Õ�.G@G>��L@E�&@ ! @Eà�#�%�= � @0#$#B��%�MW��%�-��@�[�X�&P#$�@03J�.��%Y3�@E�&@c@EA�3 � @E#�#B-��B�bo�[�Õ�.G-H���b �.��%YbY�$3���%�� *RQA�M&��2�.N�AB@0�.%�#� c�.���$-Q%�O0@EIJ��#�%G��-QN�AB-�@E�&�$-�M&@ � �&��� }*6TW�+�$-L�.%�3��$�N�-Q�.P-H%��+�&�B%c�&@Eà�#�%GA�@0IJ%c@EA�3�@0AB � NB-��.�I � �B@0�2@ � �.%��2�$-H�&� � -LMW���.��%��B%0#�3B-L%�10%��2 ^�&�$IJ%°bY%GAB%�%�3F@ � NB�2-H��L�10%��Õ�.���$-U�&@Eà�#�%B*+'+A�3��$�+bY�NB#�3�à�%°MW@E�Là�%0�&�.%��/�$M bY%°3B��-H��#$@0 �%03��.��%GA�@0IJ%^�M�.��%���2�3�N � �+�2@E�&�B%��/�.��@0AC���.-U���2� � %0-��$3+*)��$A � %Gb"%GKEAB�b �&�B%c���2� � %°�M �&�B%c���2�3BN � � @EA�3F�.��%Gã�NB@0AB�&�$�& Gb"% � �NB#�3C@0#$-�D-H���bá�.��%���2�3�N � � � �-�� @0AB3D�&�B% � �-H�¤�M6%�@ � �D�$A�1��� � %��$�.%�I *����$A�@E#�#$ °�$�¤bY�N�#$3Dà�%cN�-H%�M&N�#��.��X%01�%�AJ%�-H-�%0A��.��@E#�MW��X���2�$IJ@0�2 cK�%� �-&�Q��M¤bY%� �N�#$3D3�%0MW@0NB#��-��IJ%Y�MZ�&�B%d10@0#$N�%�-Lb"�B%�AJ�.��%"N�-H%��X@03B3�-Õ@cAB%�b ��% � ���3+*

class InvoiceItemCursor : public QSqlCursor{

public:InvoiceItemCursor();

};

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InvoiceItemCursor::InvoiceItemCursor() :QSqlCursor( "invoiceitem" )

{// NOOP

}

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=�>@?BADCFE�G�HJI � K

InvoiceItemCursor invoiceItemCursor;

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protected:QVariant calculateField( const QString & name );

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InvoiceItemCursor::InvoiceItemCursor() :QSqlCursor( "invoiceitem" )

{QSqlFieldInfo productName( "productname", QVariant::String );append( productName );setCalculated( productName.name(), TRUE );

}

QVariant InvoiceItemCursor::calculateField( const QString & name ){

if ( name == "productname" ) {QSqlQuery query( "SELECT name FROM prices WHERE id=" +

field( "pricesid" )->value().toString() + ";" );if ( query.next() )

return query.value( 0 );}

return QVariant( QString::null );}

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invoiceItemTable->addColumn( "productname", "Product" );

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InvoiceItemCursor::InvoiceItemCursor() :QSqlCursor( "invoiceitem" )

{

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=�>@?BADCFE�G�HJI ���

QSqlFieldInfo productName( "productname", QVariant::String );append( productName );setCalculated( productName.name(), TRUE );

QSqlFieldInfo productPrice( "price", QVariant::Double );append( productPrice );setCalculated( productPrice.name(), TRUE );

QSqlFieldInfo productCost( "cost", QVariant::Double );append( productCost );setCalculated( productCost.name(), TRUE );

}

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QVariant InvoiceItemCursor::calculateField( const QString & name ){

if ( name == "productname" ) {QSqlQuery query( "SELECT name FROM prices WHERE id=" +

field( "pricesid" )->value().toString() + ";" );if ( query.next() )

return query.value( 0 );}else if ( name == "price" ) {

QSqlQuery query( "SELECT price FROM prices WHERE id=" +field( "pricesid" )->value().toString() + ";" );

if ( query.next() )return query.value( 0 );

}else if ( name == "cost" ) {

QSqlQuery query( "SELECT price FROM prices WHERE id=" +field( "pricesid" )->value().toString() + ";" );

if ( query.next() )return QVariant( query.value( 0 ).toDouble() *

value( "quantity").toDouble() );}

return QVariant( QString::null );}

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QSqlRecord *primeInsert();

d ä�ïEø©õkæ4e f+ï"P�å�äZP]è�å[gNf�õkç�ôEñLe$ókõ�õÅÆ�f+øPó]è$ì�ü�û

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_J%Y3B% � #$@0��%"�NB�X�bYAJ���2�$IJ%�TWAB-�%0�2�"�[�/MWNBA � �.�$�AJ-��$A � %cb"%YbY�$#�#BA�%�%�3(�.^��%��$IJ��#�%0IJ%�A��6�.���$-,*! �B% � �A�-H�.�2N � �&��4@EA�3J�.��% � @0# � NB#�@E�&% ����%�#$3��[�QMWNBA � �&�$�AJ�2%�IJ@E��AFN�A � ��@EA���%�3+*

QSqlRecord *InvoiceItemCursor::primeInsert(){

QSqlRecord *buffer = editBuffer();QSqlQuery query( "SELECT NEXTVAL( ’invoiceitem_seq’ );" );if ( query.next() )

buffer->setValue( "id", query.value( 0 ) );buffer->setValue( "paiddate", QDate::currentDate() );buffer->setValue( "quantity", 1 );

return buffer;}

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É/3o0Ê�o� ] ��Ëo.10ÊÉ ]`_ .10#X

! �B%^%0O0@0IJ��#�%(�.@0à�#$%�-~N�-H%�3 � @EAaà�%(�2% � �2%�@E�&%�3�bY���.���&�B%(MW�#$#��bY�$A��D-H�&@EA�3B@0�23a)�> 8 *�â��N�IJ@0 (A�%�%03��.�IJ�3��$MW P�&�B%^)�> 8 �&IJ@E� � �J�&�B@0�¤NB-�%03Jà� " 0�N��X��@E�2�.� � N�#$@0�X3�@E�&@Eà�@0-H%B*

create table people (id integer primary key, name char(40))

create table staff (id integer primary key, forename char(40),surname char(40), salary float, statusid integer)

create table status (id integer primary key, name char(30))

create table creditors (id integer primary key, forename char(40),surname char(40), city char(30))

create table prices (id integer primary key, name char(40), price float)

create table invoiceitem (id integer primary key,pricesid integer, quantity integer,paiddate date)

'�-H%�ã]N�%�A � %~bY@0- N�-H%�3°�$AG�.��% � @E# � N�#$@0�.%�����%0#�3@�[�+%0O0@0IJ��#�%~@Eà��1�%B*ESU��&%~�.��@E��-�%0ã�NB%�A � %�-+@0�2%UAB���-HN���������&%03c��A°@E#�#�3�@E�&@Eà�@0-H%�-e*

create sequence invoiceitem_seq

Page 27: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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cd $QTDIR/plugins/src/sqldrivers/odbcqmake "INCLUDEPATH+=/usr/local/unixODBC/include" "LIBS+=-L/usr/local/unixODBC/lib -lodbc"make

ã �?¯¼­��F¸?�6¦p�p��­Jä6�GÓZ�p�5«�¦p´��B´� ¦p´6�Z�?¯°¨! �B% 7 �<��`��%�@E3�%��L@0AB3C�$A � #�NB3�%T�B#$%�-U-��B�N�#$3C@E#���%�@03B Gà�%^��AB-��.@0#$#�%03��$A��&�B%°�2�$�E�B�43��$�2% � �&�����%�-e*+â��N�¡.N�-H�4��@E1�%G�.Jà�N��$#�3��.��%��#�NB�E�$AF@E-/MW�#$#��bY-��

cd %QTDIR%\plugins\src\sqldrivers\odbcqmake -o Makefile odbc.pronmake

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Page 31: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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cd $QTDIR/plugins/src/sqldrivers/psqlqmake -o Makefile "INCLUDEPATH+=/usr/src/psql/src/include /usr/src/psql/src/interfaces/libpq" "LIBS+=-L/usr/lib -lpq" psql.promake

Ú � �§¥ ð ·#¥5Þ:�Y�@�Fz�¸ © ����|4}�£<z½¥�z � £�z � �Mx © � }J{ � w��Fw ì |m¥ ÚTÜ ¥�z � £�z �

ã �?¯¼­��F¸?�6¦p�p��­Jä6�GÓZ�p�5«�¦p´��B´ ³ ´6¦pѦåB��¦p´6�6ÑRQA�3B%��XRQA��$O0=��.bYG#$��à���@0�2�$%�-/@E�2%Y@010@0�$#�@Eà�#�%cbY��� � �J-HN�������2�6�.��% ! �Q)^������& � �#S�é����2%�% ! �L)�=6@CMW��%�%(��IJ��#$%�IJ%�AB�&@E�&�$�A �MÕ�&�B% ! �L)a������& � �#��L���.�&��� [e[�bYb"b9* MW��%�%��.3�-e* ����o�0*YSU��&%J�.��@E������%�% ! �Q)C�$-dAB��L 0%��-H�.@0à�#$%�=�-H^-H�IJ%"MWN�A � �.���AB@0#$���. cIJ@0 YAB��¤bY��2Kc@0-L%�O0��% � �.%�3+*é6)� �à�@0-H% 7 ��%�AJ� #��$%�A��.=�@E1�@0�$#$@0à�#$%cMW�2�IÉ���.�&��� [e[�bYb"b9* -� 0à�@0-H%B* � �I SU��.%"M&�� 8 �$A�NBO°N�-H%��2-��t¨Q%��6�&�B% 7 ��%�A(�#$�$%�A�� 5 ��\ÐMW�2�I�B�&�.�N� [e[�#$�$A�N�OZ* -H �à�@E-�%B* � �I5 %��E@E�23B#�%�-H-��MXbY�B� � �a#��$à��2@E�2 J ��NaNB-�%�=+�.��%(-��B@0��%�3a�àu¡.% � �¯�?#�% #$�$à�-� �à�3Bà* -H �$-9AB%�%�3�%03+*�)�%��/�.��%P)�â¬�6' ) ; %�AB1������A�IJ%�AB�10@0�2�$@0à�#$%c�.G����$A��¤�.G�.��%Y3B����% � �.��2 "bY��%���%d ��NJ�$A�-H�.@0#$#�%�3F�&�B% � #��$%�AB�¤#��$à��2@E�2 Y@0AB3J%�O0% � N��.%"ã�IJ@EKE%t�

cd $QTDIR/plugins/src/sqldrivers/tdsqmake -o Makefile "INCLUDEPATH=$SYBASE/include" "LIBS=-L$SYBASE/lib -lsybdb"make

ã �?¯¼­��F¸?�6¦p�p��­Jä6�GÓZ�p�5«�¦p´��B´� ¦p´6�Z�?¯°¨â0�N � @0AG%0���.��%�� N�-H%��.��%y�<� é 8 �$à��2@E�2 �-HN�����#��$%�3Pà� 9\F� � ���-��M&�B�� �&�B%~)� �à�@E-�% 7 ��%�A^�#$��%�AB�¯�?���.�&�N� [e[�b"bYb9* -� �à�@E-�%?* � �I+�0*]â��N�B@01�%Y�.^�$A � #�NB3�%cS ! _��<� 8 TZ�Õ* 8 Ti�C�.Gà�NB��#$3D�.��%"��#�NB�E�$A��

cd %QTDIR%\plugins\src\sqldrivers\tdsqmake -o Makefile "LIBS+=NTWDBLIB.LIB" tds.pronmake

�6 (3B%�MW@EN�#$�+�.��%^\F� � ���-��M&�+#$�$à��2@0�� ^�$-~N�-H%�3��A�_a��AB3��bY-H=¤��M4 ��N�bY@0AB�X�&FMW�� � %G�.��%^N�-H%^�M+�&�B%^)� �à�@0-H% 7 ��%�A��#$��%�AB�&= ��N�B@01�%Y�.^3B%��?A�%">�È0RQ) ; È0)�â¬�6'+) ; ��AoòF> ! �LT 5 òoÏe-�� � Ïe-Hã]#�Ïe3B�2�$1�%��2-&Ïe�.3�-&Ïeã�-Hã]#�ÈE�&3B-,* � ��� *

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Ì \F@EKE%Y-HN���%" 0�NJ@0�2%YNB-��$A��^@c-��B@0�2%03J>9�6#��$à��2@E�2 �=� 0�N � @0ABA���¤NB-�%c�.��%"��#$N�����AB-LbY�$�&�(@°-H�.@0�.� � à�NB��#$3+*Ì \F@EKE% -HN��2% �.��@0���.��% %�AB1������A�IJ%�AB��1�@0����@Eà�#�% > ! �QT 5 ����$A��.- �.Ç�.��% �2�$�E�B��3��$�2% � �&��� }* ¨QÇ�.��.��%Êó�> ! é�QT 5 [���#$N�����AB-�[�-Hã]#�3B�2�$1�%��2-L3��$�2% � �&��� d@EA�3JIJ@EKE%Y-HN��2%Y�.��@E�6�&�B%"��#�NB�E�$AD%�OE��-H�&-Õ��AJ�.��@E�¤3��$�2% � �&��� }*

Ì \F@EKE%c-HN���%c�&�B@0� �&�B% � #��$%�AB� #$��à���@0����%�-L�M¤�.��%`�<�6\F)J@0��%Y@01�@E��#$@0à�#$%G�AD�.��%Y-H �-H�&%�I * 7 ADRQA��$O0=���N�AC�&�B% � �IJIJ@0AB3ldd@0AB3 ��@E-�-"�&�B%(A�@0IJ%F�MX�&�B%J��#�NB�E�$A @E-d��@0�2@EIJ%��.%���= MW��~%�OE@0IJ��#$%

ldd libqsqlmysql.so*Pâ��N bY�$#�#+��%��Õ@Cb"@E�2AB��AB�

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QSqlCursor cur( "staff" ); // Specify the table/view namecur.select(); // We’ll retrieve every recordwhile ( cur.next() ) {

qDebug( cur.value( "id" ).toString() + ": " +cur.value( "surname" ).toString() + " " +cur.value( "salary" ).toString() );

}

Page 69: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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QSqlCursor cur( "prices" );cur.select( "id=202" );if ( cur.next() ) {

QSqlRecord *buffer = cur.primeUpdate();double price = buffer->value( "price" ).toDouble();double newprice = price * 1.05;buffer->setValue( "price", newprice );cur.update();

}

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QSqlCursor cur( "prices" );QSqlRecord *buffer = cur.primeInsert();buffer->setValue( "id", 53981 );buffer->setValue( "name", "Thingy" );buffer->setValue( "price", 105.75 );cur.insert();

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QSqlCursor cur( "Employee" );cur.select( "deptno=10" ); // select all records in department 10while( cur.next() ) {

... // process data}...cur.select(); // re-selects all records in department 10...

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Page 76: (eBook - PDF) - Trolltech - Databases With Qt (en Us)

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QSqlCursor cur( "Employee" );QSqlIndex pk = cur.primaryIndex();cur.setValue( "id", 10 );cur.select( pk, pk ); // generates "SELECT ... FROM Employee WHERE id=10 ORDER BY id"...

T&A �.���$-�%�OE@0IJ��#$%J�.��%J>9)�ã]#$TWAB3�%�OE=+��KE=4�$-�N�-H%�3`MW��~�.b"�3B��M&MW%���%�A��/��N��2���-�%�-e*"_ �B%�A NB-�%03 @0-"�&�B%��B#$�&%0���[�B��-��[�"@0�2��N�IJ%0A��.=�.��%$�?%�#$3 A�@EIJ%�-"��� � �A��.@0�$A�-"@0��%JN�-H%�3 �. � �A�-H�.�2N � �Õ�.��%(_ < ;B54; � #�@EN�-H%�=X%�@ � � -H%��Õ�.��&�B% � N����2%�AB� � N��2-H��91�@E#�NB%�=

WHEREid=10

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ORDER BY id�$AD�.���$-/%�O0@EIJ��#$%B*

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name=’Dave’*

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QSqlCursor cur( "Employee" );cur.setMode( QSqlCursor::Writable ); // allow insert/update/delete...cur.setMode( QSqlCursor::Insert | QSqlCursor::Update ); // allow inserts and updates only...cur.setMode( QSqlCursor::ReadOnly ); // no inserts/updates/deletes allowed

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QSqlCursor cur( "prices" );cur.select( "id=202" );if ( cur.next() ) {

QSqlRecord *buffer = cur.primeUpdate();double price = buffer->value( "price" ).toDouble();double newprice = price * 1.05;buffer->setValue( "price", newprice );cur.update();

}

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QLineEdit myEditor( this );QSqlForm myForm( this );QSqlCursor myCursor( "mytable" );

// Execute a query to make the cursor validmyCursor.select();// Move the cursor to a valid record (the first record)myCursor.next();// Set the form’s record pointer to the cursor’s edit buffer (which// contains the current record’s values)myForm.setRecord( myCursor.primeUpdate() );

// Insert a field into the form that uses myEditor to edit the// field ’somefield’ in ’mytable’myForm.insert( &myEditor, "somefield" );

// Update myEditor with the value from the mapped database fieldmyForm.readFields();...// Let the user edit the form...// Update the databasemyForm.writeFields(); // Update the cursor’s edit buffer from the formmyCursor.update(); // Update the database from the cursor’s buffer

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