doc/html/sql-overview-subclass3-main-cpp.html


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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/subclass3/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 TQt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include "main.h"
#include &lt;<a href="tqdatatable-h.html">tqdatatable.h</a>&gt;

<a name="f23"></a>InvoiceItemCursor::InvoiceItemCursor() :
    <a href="tqsqlcursor.html">TQSqlCursor</a>( "invoiceitem" )
{
    <a href="tqsqlfieldinfo.html">TQSqlFieldInfo</a> productName( "productname", TQVariant::String );
    <a href="tqsqlcursor.html#append">append</a>( productName );
    <a href="tqsqlcursor.html#setCalculated">setCalculated</a>( productName.<a href="tqsqlfieldinfo.html#name">name</a>(), TRUE );
}


TQVariant InvoiceItemCursor::<a href="tqsqlcursor.html#calculateField">calculateField</a>( const <a href="ntqstring.html">TQString</a> &amp; name )
{
    if ( name == "productname" ) {
        <a href="tqsqlquery.html">TQSqlQuery</a> query( "SELECT name FROM prices WHERE id=" +
                     <a href="tqsqlrecord.html#field">field</a>( "pricesid" )-&gt;value().toString() );
        if ( query.<a href="tqsqlquery.html#next">next</a>() )
            return query.<a href="tqsqlquery.html#value">value</a>( 0 );
    }

    return TQVariant( TQString::null );
}


int main( int argc, char *argv[] )
{
    <a href="ntqapplication.html">TQApplication</a> app( argc, argv );

    if ( createConnections() ) {
        InvoiceItemCursor invoiceItemCursor;

        <a href="tqdatatable.html">TQDataTable</a> *invoiceItemTable = new <a href="tqdatatable.html">TQDataTable</a>( &amp;invoiceItemCursor );

        app.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( invoiceItemTable );

        invoiceItemTable-&gt;<a href="tqdatatable.html#addColumn">addColumn</a>( "productname", "Product" );
        invoiceItemTable-&gt;<a href="tqdatatable.html#addColumn">addColumn</a>( "quantity",    "Quantity" );
        invoiceItemTable-&gt;<a href="tqdatatable.html#addColumn">addColumn</a>( "paiddate",    "Paid" );

        invoiceItemTable-&gt;<a href="tqdatatable.html#refresh">refresh</a>();
        invoiceItemTable-&gt;<a href="ntqwidget.html#show">show</a>();

        return app.<a href="ntqapplication.html#exec">exec</a>();
    }

    return 1;
}
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