source: trunk/doc/html/sql-overview-subclass4-main-cpp.html@ 203

Last change on this file since 203 was 190, checked in by rudi, 14 years ago

reference documentation added
File size: 5.7 KB
Line 
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/sql.doc:65 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>sql/overview/subclass4/main.cpp Example File</title>
7<style type="text/css"><!--
8fn { margin-left: 1cm; text-indent: -1cm; }
9a:link { color: #004faf; text-decoration: none }
10a:visited { color: #672967; text-decoration: none }
11body { background: #ffffff; color: black; }
12--></style>
13</head>
14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
23 | <a href="mainclasses.html">
24<font color="#004faf">Main&nbsp;Classes</font></a>
25 | <a href="annotated.html">
26<font color="#004faf">Annotated</font></a>
27 | <a href="groups.html">
28<font color="#004faf">Grouped&nbsp;Classes</font></a>
29 | <a href="functions.html">
30<font color="#004faf">Functions</font></a>
31</td>
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/subclass4/main.cpp Example File</h1>
33
34
35<pre>/****************************************************************************
36** $Id: sql-overview-subclass4-main-cpp.html 2051 2007-02-21 10:04:20Z chehrlic $
37**
38** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
39**
40** This file is part of an example program for Qt. This example
41** program may be used, distributed and modified without limitation.
42**
43*****************************************************************************/
44
45#include "main.h"
46#include &lt;<a href="qdatatable-h.html">qdatatable.h</a>&gt;
47
48<a name="f24"></a>InvoiceItemCursor::InvoiceItemCursor() :
49 <a href="qsqlcursor.html">QSqlCursor</a>( "invoiceitem" )
50{
51 <a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productName( "productname", QVariant::String );
52 <a href="qsqlcursor.html#append">append</a>( productName );
53 <a href="qsqlcursor.html#setCalculated">setCalculated</a>( productName.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
54
55 <a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productPrice( "price", QVariant::Double );
56 <a href="qsqlcursor.html#append">append</a>( productPrice );
57 <a href="qsqlcursor.html#setCalculated">setCalculated</a>( productPrice.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
58
59 <a href="qsqlfieldinfo.html">QSqlFieldInfo</a> productCost( "cost", QVariant::Double );
60 <a href="qsqlcursor.html#append">append</a>( productCost );
61 <a href="qsqlcursor.html#setCalculated">setCalculated</a>( productCost.<a href="qsqlfieldinfo.html#name">name</a>(), TRUE );
62}
63
64
65QVariant InvoiceItemCursor::<a href="qsqlcursor.html#calculateField">calculateField</a>( const <a href="qstring.html">QString</a> &amp; name )
66{
67
68 if ( name == "productname" ) {
69 <a href="qsqlquery.html">QSqlQuery</a> query( "SELECT name FROM prices WHERE id=" +
70 <a href="qsqlrecord.html#field">field</a>( "pricesid" )-&gt;value().toString() );
71 if ( query.<a href="qsqlquery.html#next">next</a>() )
72 return query.<a href="qsqlquery.html#value">value</a>( 0 );
73 }
74 else if ( name == "price" ) {
75 <a href="qsqlquery.html">QSqlQuery</a> query( "SELECT price FROM prices WHERE id=" +
76 <a href="qsqlrecord.html#field">field</a>( "pricesid" )-&gt;value().toString() );
77 if ( query.<a href="qsqlquery.html#next">next</a>() )
78 return query.<a href="qsqlquery.html#value">value</a>( 0 );
79 }
80 else if ( name == "cost" ) {
81 <a href="qsqlquery.html">QSqlQuery</a> query( "SELECT price FROM prices WHERE id=" +
82 <a href="qsqlrecord.html#field">field</a>( "pricesid" )-&gt;value().toString() );
83 if ( query.<a href="qsqlquery.html#next">next</a>() )
84 return QVariant( query.<a href="qsqlquery.html#value">value</a>( 0 ).toDouble() *
85 <a href="qsqlquery.html#value">value</a>( "quantity").toDouble() );
86 }
87
88 return QVariant( QString::null );
89}
90
91
92int main( int argc, char *argv[] )
93{
94 <a href="qapplication.html">QApplication</a> app( argc, argv );
95
96 if ( createConnections() ) {
97 InvoiceItemCursor invoiceItemCursor;
98
99 <a href="qdatatable.html">QDataTable</a> *invoiceItemTable = new <a href="qdatatable.html">QDataTable</a>( &amp;invoiceItemCursor );
100
101 app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( invoiceItemTable );
102
103 invoiceItemTable-&gt;<a href="qdatatable.html#addColumn">addColumn</a>( "productname", "Product" );
104 invoiceItemTable-&gt;<a href="qdatatable.html#addColumn">addColumn</a>( "price", "Price" );
105 invoiceItemTable-&gt;<a href="qdatatable.html#addColumn">addColumn</a>( "quantity", "Quantity" );
106 invoiceItemTable-&gt;<a href="qdatatable.html#addColumn">addColumn</a>( "cost", "Cost" );
107 invoiceItemTable-&gt;<a href="qdatatable.html#addColumn">addColumn</a>( "paiddate", "Paid" );
108
109 invoiceItemTable-&gt;<a href="qdatatable.html#refresh">refresh</a>();
110 invoiceItemTable-&gt;<a href="qwidget.html#show">show</a>();
111
112 return app.<a href="qapplication.html#exec">exec</a>();
113 }
114
115 return 1;
116}
117</pre><!-- eof -->
118<p><address><hr><div align=center>
119<table width=100% cellspacing=0 border=0><tr>
120<td>Copyright &copy; 2007
121<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
122<td align=right><div align=right>Qt 3.3.8</div>
123</table></div></address></body>
124</html>
Note: See TracBrowser for help on using the repository browser.