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| 2 | <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/sql.doc:63 -->
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| 6 | <title>sql/overview/subclass3/main.cpp Example File</title>
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| 20 | <font color="#004faf">Home</font></a>
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <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>
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| 33 |
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| 34 |
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| 35 | <pre>/****************************************************************************
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| 36 | ** $Id: sql-overview-subclass3-main-cpp.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 37 | **
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| 38 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 39 | **
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| 40 | ** This file is part of an example program for Qt. This example
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| 41 | ** program may be used, distributed and modified without limitation.
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| 42 | **
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| 43 | *****************************************************************************/
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| 44 |
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| 45 | #include "main.h"
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| 46 | #include <<a href="qdatatable-h.html">qdatatable.h</a>>
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| 47 |
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| 48 | <a name="f23"></a>InvoiceItemCursor::InvoiceItemCursor() :
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| 49 | <a href="qsqlcursor.html">QSqlCursor</a>( "invoiceitem" )
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| 50 | {
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| 51 | <a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productName( "productname", QVariant::String );
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| 52 | <a href="qsqlcursor.html#append">append</a>( productName );
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| 53 | <a href="qsqlcursor.html#setCalculated">setCalculated</a>( productName.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
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| 54 | }
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| 55 |
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| 56 |
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| 57 | QVariant InvoiceItemCursor::<a href="qsqlcursor.html#calculateField">calculateField</a>( const <a href="qstring.html">QString</a> & name )
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| 58 | {
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| 59 | if ( name == "productname" ) {
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| 60 | <a href="qsqlquery.html">QSqlQuery</a> query( "SELECT name FROM prices WHERE id=" +
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| 61 | <a href="qsqlrecord.html#field">field</a>( "pricesid" )->value().toString() );
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| 62 | if ( query.<a href="qsqlquery.html#next">next</a>() )
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| 63 | return query.<a href="qsqlquery.html#value">value</a>( 0 );
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| 64 | }
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| 65 |
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| 66 | return QVariant( QString::null );
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| 67 | }
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| 68 |
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| 69 |
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| 70 | int main( int argc, char *argv[] )
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| 71 | {
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| 72 | <a href="qapplication.html">QApplication</a> app( argc, argv );
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| 73 |
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| 74 | if ( createConnections() ) {
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| 75 | InvoiceItemCursor invoiceItemCursor;
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| 76 |
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| 77 | <a href="qdatatable.html">QDataTable</a> *invoiceItemTable = new <a href="qdatatable.html">QDataTable</a>( &invoiceItemCursor );
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| 78 |
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| 79 | app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( invoiceItemTable );
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| 80 |
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| 81 | invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "productname", "Product" );
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| 82 | invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "quantity", "Quantity" );
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| 83 | invoiceItemTable-><a href="qdatatable.html#addColumn">addColumn</a>( "paiddate", "Paid" );
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| 84 |
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| 85 | invoiceItemTable-><a href="qdatatable.html#refresh">refresh</a>();
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| 86 | invoiceItemTable-><a href="qwidget.html#show">show</a>();
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| 87 |
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| 88 | return app.<a href="qapplication.html#exec">exec</a>();
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| 89 | }
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| 90 |
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| 91 | return 1;
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| 92 | }
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| 93 | </pre><!-- eof -->
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| 94 | <p><address><hr><div align=center>
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| 95 | <table width=100% cellspacing=0 border=0><tr>
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| 96 | <td>Copyright © 2007
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| 97 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 98 | <td align=right><div align=right>Qt 3.3.8</div>
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| 99 | </table></div></address></body>
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| 100 | </html>
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