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    41 

    42 #include <QtGui>

    43 #include <QtSql>

    44 

    45 #include "../connection.h"

    46 

    47 void initializeModel(QSqlRelationalTableModel *model)

    48 {

    49 //! [0]

    50     model->setTable("employee");

    51 //! [0]

    52 

    53     model->setEditStrategy(QSqlTableModel::OnManualSubmit);

    54 //! [1]

    55     model->setRelation(2, QSqlRelation("city", "id", "name"));

    56 //! [1] //! [2]

    57     model->setRelation(3, QSqlRelation("country", "id", "name"));

    58 //! [2]

    59 

    60 //! [3]

    61     model->setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));

    62     model->setHeaderData(1, Qt::Horizontal, QObject::tr("Name"));

    63     model->setHeaderData(2, Qt::Horizontal, QObject::tr("City"));

    64     model->setHeaderData(3, Qt::Horizontal, QObject::tr("Country"));

    65 //! [3]

    66 

    67     model->select();

    68 }

    69 

    70 QTableView *createView(const QString &title, QSqlTableModel *model)

    71 {

    72 //! [4]

    73     QTableView *view = new QTableView;

    74     view->setModel(model);

    75     view->setItemDelegate(new QSqlRelationalDelegate(view));

    76 //! [4]

    77     view->setWindowTitle(title);

    78     return view;

    79 }

    80 

    81 void createRelationalTables()

    82 {

    83     QSqlQuery query;

    84     query.exec("create table employee(id int primary key, name varchar(20), city int, country int)");

    85     query.exec("insert into employee values(1, 'Espen', 5000, 47)");

    86     query.exec("insert into employee values(2, 'Harald', 80000, 49)");

    87     query.exec("insert into employee values(3, 'Sam', 100, 1)");

    88 

    89     query.exec("create table city(id int, name varchar(20))");

    90     query.exec("insert into city values(100, 'San Jose')");

    91     query.exec("insert into city values(5000, 'Oslo')");

    92     query.exec("insert into city values(80000, 'Munich')");

    93 

    94     query.exec("create table country(id int, name varchar(20))");

    95     query.exec("insert into country values(1, 'USA')");

    96     query.exec("insert into country values(47, 'Norway')");

    97     query.exec("insert into country values(49, 'Germany')");

    98 }

    99 

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

   101 {

   102     QApplication app(argc, argv);

   103     if (!createConnection())

   104         return 1;

   105     createRelationalTables();

   106 

   107     QSqlRelationalTableModel model;

   108 

   109     initializeModel(&model);

   110 

   111     QTableView *view = createView(QObject::tr("Relational Table Model"), &model);

   112     view->show();

   113 

   114     return app.exec();

   115 }