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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>sql/overview/subclass5/main.cpp Example File</h1>
<pre>/****************************************************************************
** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 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 <<a href="qdatatable-h.html">qdatatable.h</a>>
<a name="f25"></a>InvoiceItemCursor::InvoiceItemCursor() :
<a href="qsqlcursor.html">QSqlCursor</a>( "invoiceitem" )
{
<a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productName( "productname", QVariant::String );
<a href="qsqlcursor.html#append">append</a>( productName );
<a href="qsqlcursor.html#setCalculated">setCalculated</a>( productName.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
<a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productPrice( "price", QVariant::Double );
<a href="qsqlcursor.html#append">append</a>( productPrice );
<a href="qsqlcursor.html#setCalculated">setCalculated</a>( productPrice.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
<a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productCost( "cost", QVariant::Double );
<a href="qsqlcursor.html#append">append</a>( productCost );
<a href="qsqlcursor.html#setCalculated">setCalculated</a>( productCost.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
}
QVariant InvoiceItemCursor::<a href="qsqlcursor.html#calculateField">calculateField</a>( const <a href="qstring.html">QString</a> & name )
{
if ( name == "productname" ) {
<a href="qsqlquery.html">QSqlQuery</a> query( "SELECT name FROM prices WHERE id=" +
<a href="qsqlrecord.html#field">field</a>( "pricesid" )->value().toString() );
if ( query.<a href="qsqlquery.html#next">next</a>() )
return query.<a href="qsqlquery.html#value">value</a>( 0 );
}
else if ( name == "price" ) {
<a href="qsqlquery.html">QSqlQuery</a> query( "SELECT price FROM prices WHERE id=" +
<a href="qsqlrecord.html#field">field</a>( "pricesid" )->value().toString() );
if ( query.<a href="qsqlquery.html#next">next</a>() )
return query.<a href="qsqlquery.html#value">value</a>( 0 );
}
else if ( name == "cost" ) {
<a href="qsqlquery.html">QSqlQuery</a> query( "SELECT price FROM prices WHERE id=" +
<a href="qsqlrecord.html#field">field</a>( "pricesid" )->value().toString() );
if ( query.<a href="qsqlquery.html#next">next</a>() )
return QVariant( query.<a href="qsqlquery.html#value">value</a>( 0 ).toDouble() *
<a href="qsqlquery.html#value">value</a>( "quantity").toDouble() );
}
return QVariant( QString::null );
}
QSqlRecord *InvoiceItemCursor::<a href="qsqlcursor.html#primeInsert">primeInsert</a>()
{
<a href="qsqlrecord.html">QSqlRecord</a> *buffer = <a href="qsqlcursor.html#editBuffer">editBuffer</a>();
<a href="qsqlquery.html">QSqlQuery</a> query( "SELECT NEXTVAL( 'invoiceitem_seq' )" );
if ( query.<a href="qsqlquery.html#next">next</a>() )
buffer-><a href="qsqlrecord.html#setValue">setValue</a>( "id", query.<a href="qsqlquery.html#value">value</a>( 0 ) );
buffer-><a href="qsqlrecord.html#setValue">setValue</a>( "paiddate", QDate::currentDate() );
buffer-><a href="qsqlrecord.html#setValue">setValue</a>( "quantity", 1 );
return buffer;
}
int main( int argc, char *argv[] )
{
<a href="qapplication.html">QApplication</a> app( argc, argv );
if ( createConnections() ) {
InvoiceItemCursor invoiceItemCursor;
<a href="qdatatable.html">QDataTable</a> *invoiceItemTable = new <a href="qdatatable.html">QDataTable</a>( &invoiceItemCursor );
app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( invoiceItemTable );
invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "productname", "Product" );
invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "price", "Price" );
invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "quantity", "Quantity" );
invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "cost", "Cost" );
invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "paiddate", "Paid" );
invoiceItemTable-><a href="qdatatable.html#refresh">refresh</a>();
invoiceItemTable-><a href="qwidget.html#show">show</a>();
return app.<a href="qapplication.html#exec">exec</a>();
}
return 1;
}
</pre><!-- eof -->
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