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/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. 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"
#include <qdatatable.h>
InvoiceItemCursor::InvoiceItemCursor() :
QSqlCursor( "invoiceitem" )
{
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 );
}
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 );
}
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;
}
int main( int argc, char *argv[] )
{
QApplication app( argc, argv );
if ( createConnections() ) {
InvoiceItemCursor invoiceItemCursor;
QDataTable *invoiceItemTable = new QDataTable( &invoiceItemCursor );
app.setMainWidget( invoiceItemTable );
invoiceItemTable->addColumn( "productname", "Product" );
invoiceItemTable->addColumn( "price", "Price" );
invoiceItemTable->addColumn( "quantity", "Quantity" );
invoiceItemTable->addColumn( "cost", "Cost" );
invoiceItemTable->addColumn( "paiddate", "Paid" );
invoiceItemTable->refresh();
invoiceItemTable->show();
return app.exec();
}
return 1;
}
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