/usr/share/qt3/doc/html/sql-overview-subclass5-main-cpp.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/sql.doc:67 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>sql/overview/subclass5/main.cpp Example File</title>
<style type="text/css"><!--
fn { margin-left: 1cm; text-indent: -1cm; }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
body { background: #ffffff; color: black; }
--></style>
</head>
<body>

<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr bgcolor="#E5E5E5">
<td valign=center>
 <a href="index.html">
<font color="#004faf">Home</font></a>
 | <a href="classes.html">
<font color="#004faf">All&nbsp;Classes</font></a>
 | <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
 | <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
 | <a href="groups.html">
<font color="#004faf">Grouped&nbsp;Classes</font></a>
 | <a href="functions.html">
<font color="#004faf">Functions</font></a>
</td>
<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 &lt;<a href="qdatatable-h.html">qdatatable.h</a>&gt;

<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> &amp; 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" )-&gt;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" )-&gt;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" )-&gt;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-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "id", query.<a href="qsqlquery.html#value">value</a>( 0 ) );
    buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "paiddate", QDate::currentDate() );
    buffer-&gt;<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>( &amp;invoiceItemCursor );

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

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

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

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

    return 1;
}
</pre><!-- eof -->
<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright &copy; 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt 3.3.8</div>
</table></div></address></body>
</html>
qt3-doc 3:3.3.8-b-8ubuntu3 / usr / share / qt3 / doc / html / sql-overview-subclass5-main-cpp.html
