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<!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/examples/table/statistics/statistics.doc:1 -->
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Table Example</title>
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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>Table Example</h1>
<p>
Another <a href="qtable.html">QTable</a> example.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/statistics.h 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.
**
*****************************************************************************/
#ifndef STATISTICS_H
#define STATISTICS_H
#include <<a href="qtable-h.html">qtable.h</a>>
#include <<a href="qcombobox-h.html">qcombobox.h</a>>
class TableItem : public <a href="qtableitem.html">QTableItem</a>
{
public:
TableItem( <a href="qtable.html">QTable</a> *t, EditType et, const <a href="qstring.html">QString</a> &txt ) : <a href="qtableitem.html">QTableItem</a>( t, et, txt ) {}
void paint( <a href="qpainter.html">QPainter</a> *p, const <a href="qcolorgroup.html">QColorGroup</a> &cg, const <a href="qrect.html">QRect</a> &cr, bool selected );
};
class ComboItem : public <a href="qtableitem.html">QTableItem</a>
{
public:
ComboItem( <a href="qtable.html">QTable</a> *t, EditType et );
<a href="qwidget.html">QWidget</a> *createEditor() const;
void setContentFromEditor( <a href="qwidget.html">QWidget</a> *w );
void setText( const <a href="qstring.html">QString</a> &s );
private:
<a href="qcombobox.html">QComboBox</a> *cb;
};
class Table : public <a href="qtable.html">QTable</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
Table();
void sortColumn( int col, bool ascending, bool wholeRows );
private slots:
void recalcSum( int row, int col );
private:
void initTable();
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/statistics.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 "statistics.h"
#include <<a href="qdir-h.html">qdir.h</a>>
#include <<a href="qstringlist-h.html">qstringlist.h</a>>
#include <<a href="qheader-h.html">qheader.h</a>>
#include <<a href="qcombobox-h.html">qcombobox.h</a>>
#include <stdlib.h>
const char* dirs[] = {
"kernel",
"tools",
"widgets",
"dialogs",
"xml",
"table",
"network",
"opengl",
"canvas",
0
};
<a name="f578"></a>Table::Table()
: <a href="qtable.html">QTable</a>( 10, 100, 0, "table" )
{
<a href="qtable.html#setSorting">setSorting</a>( TRUE );
<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 0, tr( "File" ) );
<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 1, tr( "Size (bytes)" ) );
<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 2, tr( "Use in Sum" ) );
initTable();
<a href="qtable.html#adjustColumn">adjustColumn</a>( 0 );
// if the user edited something we might need to recalculate the sum
<a href="qobject.html#connect">connect</a>( this, SIGNAL( <a href="qtable.html#valueChanged">valueChanged</a>( int, int ) ),
this, SLOT( recalcSum( int, int ) ) );
}
void <a name="f579"></a>Table::initTable()
{
// read all the Qt source and header files into a list
<a href="qstringlist.html">QStringList</a> all;
int i = 0;
<a href="qstring.html">QString</a> srcdir( "../../../src/" );
while ( dirs[ i ] ) {
<a href="qdir.html">QDir</a> dir( srcdir + dirs[ i ] );
<a name="x2780"></a> <a href="qstringlist.html">QStringList</a> lst = dir.<a href="qdir.html#entryList">entryList</a>( "*.cpp; *.h" );
<a name="x2791"></a><a name="x2789"></a> for ( QStringList::Iterator it = lst.<a href="qvaluelist.html#begin">begin</a>(); it != lst.<a href="qvaluelist.html#end">end</a>(); ++it ) {
if ( ( *it ).contains( "moc" ) )
continue;
all << (QString( dirs[ i ] ) + "/" + *it);
}
++i;
}
// set the number of rows we'll need for the table
<a name="x2790"></a> <a href="qtable.html#setNumRows">setNumRows</a>( all.<a href="qvaluelist.html#count">count</a>() + 1 );
i = 0;
int sum = 0;
// insert the data into the table
for ( QStringList::Iterator it = all.<a href="qvaluelist.html#begin">begin</a>(); it != all.<a href="qvaluelist.html#end">end</a>(); ++it ) {
<a href="qtable.html#setText">setText</a>( i, 0, *it );
<a href="qfile.html">QFile</a> f( srcdir + *it );
<a name="x2781"></a> <a href="qtable.html#setText">setText</a>( i, 1, QString::number( (ulong)f.<a href="qfile.html#size">size</a>() ) );
ComboItem *ci = new ComboItem( this, QTableItem::WhenCurrent );
<a href="qtable.html#setItem">setItem</a>( i++, 2, ci );
sum += f.<a href="qfile.html#size">size</a>();
}
// last row should show the sum
TableItem *i1 = new TableItem( this, QTableItem::Never, tr( "Sum" ) );
<a href="qtable.html#setItem">setItem</a>( i, 0, i1 );
TableItem *i2 = new TableItem( this, QTableItem::Never, QString::number( sum ) );
<a href="qtable.html#setItem">setItem</a>( i, 1, i2 );
}
void <a name="f580"></a>Table::recalcSum( int, int col )
{
// only recalc if a value in the second or third column changed
if ( col < 1 || col > 2 )
return;
// recalc sum
int sum = 0;
for ( int i = 0; i < numRows() - 1; ++i ) {
if ( <a href="qtableitem.html#text">text</a>( i, 2 ) == "No" )
continue;
sum += <a href="qtableitem.html#text">text</a>( i, 1 ).toInt();
}
// insert calculated data
TableItem *i1 = new TableItem( this, QTableItem::Never, tr( "Sum" ) );
setItem( numRows() - 1, 0, i1 );
TableItem *i2 = new TableItem( this, QTableItem::Never, QString::number( sum ) );
setItem( numRows() - 1, 1, i2 );
}
<a name="x2784"></a>void Table::<a href="qtable.html#sortColumn">sortColumn</a>( int col, bool ascending, bool /*wholeRows*/ )
{
// sum row should not be sorted, so get rid of it for now
clearCell( numRows() - 1, 0 );
clearCell( numRows() - 1, 1 );
// do sort
QTable::<a href="qtable.html#sortColumn">sortColumn</a>( col, ascending, TRUE );
// re-insert sum row
recalcSum( 0, 1 );
}
<a name="x2786"></a>void TableItem::<a href="qtableitem.html#paint">paint</a>( <a href="qpainter.html">QPainter</a> *p, const <a href="qcolorgroup.html">QColorGroup</a> &cg, const <a href="qrect.html">QRect</a> &cr, bool selected )
{
<a href="qcolorgroup.html">QColorGroup</a> g( cg );
// last row is the sum row - we want to make it more visible by
// using a red background
if ( <a href="qtableitem.html#row">row</a>() == <a href="qtableitem.html#table">table</a>()->numRows() - 1 )
<a name="x2779"></a> g.<a href="qcolorgroup.html#setColor">setColor</a>( QColorGroup::Base, red );
QTableItem::<a href="qtableitem.html#paint">paint</a>( p, g, cr, selected );
}
<a name="f577"></a>ComboItem::ComboItem( <a href="qtable.html">QTable</a> *t, EditType et )
: <a href="qtableitem.html">QTableItem</a>( t, et, "Yes" ), cb( 0 )
{
// we do not want this item to be replaced
<a href="qtableitem.html#setReplaceable">setReplaceable</a>( FALSE );
}
<a name="x2785"></a>QWidget *ComboItem::<a href="qtableitem.html#createEditor">createEditor</a>() const
{
// create an editor - a combobox in our case
( (ComboItem*)this )->cb = new <a href="qcombobox.html">QComboBox</a>( <a href="qtableitem.html#table">table</a>()->viewport() );
QObject::<a href="qobject.html#connect">connect</a>( cb, SIGNAL( activated( int ) ), table(), SLOT( doValueChanged() ) );
cb->insertItem( "Yes" );
cb->insertItem( "No" );
// and initialize it
cb->setCurrentItem( <a href="qtableitem.html#text">text</a>() == "No" ? 1 : 0 );
return cb;
}
<a name="x2787"></a>void ComboItem::<a href="qtableitem.html#setContentFromEditor">setContentFromEditor</a>( <a href="qwidget.html">QWidget</a> *w )
{
// the user changed the value of the combobox, so synchronize the
// value of the item (its text), with the value of the combobox
<a name="x2783"></a> if ( w-><a href="qobject.html#inherits">inherits</a>( "QComboBox" ) )
<a href="qtableitem.html#setText">setText</a>( ( (QComboBox*)w )->currentText() );
else
QTableItem::<a href="qtableitem.html#setContentFromEditor">setContentFromEditor</a>( w );
}
<a name="x2788"></a>void ComboItem::<a href="qtableitem.html#setText">setText</a>( const <a href="qstring.html">QString</a> &s )
{
if ( cb ) {
// initialize the combobox from the text
if ( s == "No" )
cb->setCurrentItem( 1 );
else
cb->setCurrentItem( 0 );
}
QTableItem::<a href="qtableitem.html#setText">setText</a>( s );
}
</pre>
<p> <hr>
<p> Main:
<p> <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 "statistics.h"
#include <<a href="qapplication-h.html">qapplication.h</a>>
int main( int argc, char **argv )
{
<a href="qapplication.html">QApplication</a> a(argc,argv);
Table t;
a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &t );
t.<a href="qwidget.html#show">show</a>();
return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="table-examples.html">Table Examples</a>.
<!-- eof -->
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<table width=100% cellspacing=0 border=0><tr>
<td>Copyright © 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>
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