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sql/overview/table4/main.cpp Example File

/****************************************************************************
** $Id$
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of an example program for Qt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "main.h"


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++;
    }
}


int StatusPicker::statusId() const
{
    return index2id[ currentItem() ];
}


void StatusPicker::setStatusId( int statusid )
{
    QMap<int,int>::Iterator it;
    for ( it = index2id.begin(); it != index2id.end(); ++it ) {
        if ( it.data() == statusid ) {
            setCurrentItem( it.key() );
            break;
        }
    }
}


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) ;
    }
}


QWidget *CustomSqlEditorFactory::createEditor(
    QWidget *parent, const QSqlField *field )
{
    if ( field->name() == "statusid" ) {
        QWidget *editor = new StatusPicker( parent );
        return editor;
    }

    return QSqlEditorFactory::createEditor( parent, field );
}


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

    if ( createConnections() ) {
        QSqlCursor staffCursor( "staff" );

        CustomTable             *staffTable     = new CustomTable( &staffCursor );
        QSqlPropertyMap         *propMap        = new QSqlPropertyMap();
        CustomSqlEditorFactory  *editorFactory  = new CustomSqlEditorFactory();
        propMap->insert( "StatusPicker", "statusid" );
        staffTable->installPropertyMap( propMap );
        staffTable->installEditorFactory( editorFactory );

        app.setMainWidget( staffTable );

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

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

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

        return app.exec();
    }

    return 1;
}


bool createConnections()
{
    // create the default database connection
    QSqlDatabase *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 );
    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 oracle
    QSqlDatabase *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;
}