/******************************************************************************** Copyright (C) 1992-2000 Trolltech AS.  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 <qapplication.h>#include <qsqldatabase.h>#include <qdatatable.h>#include <qsqlcursor.h>#include <qmessagebox.h>/* Modify the following to match your environment */#define DRIVER       "QSQLITE"  /* see the Qt SQL documentation for a list of available drivers */#define DATABASE     ":memory:" /* the name of your database */#define USER         ""   /* user name with appropriate rights */#define PASSWORD     ""   /* password for USER */#define HOST         "" /* host on which the database is running */class SimpleCursor : public QSqlCursor{public:    SimpleCursor () : QSqlCursor( "simpletable" ) {}protected:    QSqlRecord* primeInsert()    {	/* a real-world application would use sequences, or the like */	QSqlRecord* buf = QSqlCursor::primeInsert();	QSqlQuery q( "select max(id)+1 from simpletable" );	if ( q.next() )	       buf->setValue( "id", q.value(0) );	return buf;    }};int main( int argc, char ** argv ){    QApplication a( argc, argv );    QSqlDatabase * db = QSqlDatabase::addDatabase( DRIVER );    db->setDatabaseName( DATABASE );    db->setUserName( USER );    db->setPassword( PASSWORD );    db->setHostName( HOST );    if( !db->open() ){	db->lastError().showMessage( "An error occured. Please read the README file in the sqltable"				     "dir for more information.\n\n" );	return 1;    }    if (!db->tables().contains("simpletable")) {	QSqlQuery q("create table simpletable(id int, name varchar(20), address varchar(20))", db);    }    SimpleCursor cursor;    QDataTable table( &cursor ); /* data table uses our cursor */    table.addColumn( "name", "Name" );    table.addColumn( "address", "Address" );    table.setSorting( TRUE );    a.setMainWidget( &table );    table.refresh(); /* load data */    table.show();    /* show widget */    return a.exec();}