doc/html/table-statistics-statistics-cpp.html


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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>table/statistics/statistics.cpp Example File</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/statistics/statistics.cpp Example File</h1>

 
<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 &lt;<a href="qdir-h.html">qdir.h</a>&gt;
#include &lt;<a href="qstringlist-h.html">qstringlist.h</a>&gt;
#include &lt;<a href="qheader-h.html">qheader.h</a>&gt;
#include &lt;<a href="qcombobox-h.html">qcombobox.h</a>&gt;
#include &lt;stdlib.h&gt;

const char* dirs[] = {
    "kernel",
    "tools",
    "widgets",
    "dialogs",
    "xml",
    "table",
    "network",
    "opengl",
    "canvas",
    0
};

<a name="f145"></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>()-&gt;setLabel( 0, tr( "File" ) );
    <a href="qtable.html#horizontalHeader">horizontalHeader</a>()-&gt;setLabel( 1, tr( "Size (bytes)" ) );
    <a href="qtable.html#horizontalHeader">horizontalHeader</a>()-&gt;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="f146"></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 &lt;&lt; (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="f147"></a>Table::recalcSum( int, int col )
{
    // only recalc if a value in the second or third column changed
    if ( col &lt; 1 || col &gt; 2 )
        return;

    // recalc sum
    int sum = 0;
    for ( int i = 0; i &lt; 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> &amp;cg, const <a href="qrect.html">QRect</a> &amp;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>()-&gt;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="f144"></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 )-&gt;cb = new <a href="qcombobox.html">QComboBox</a>( <a href="qtableitem.html#table">table</a>()-&gt;viewport() );
    QObject::<a href="qobject.html#connect">connect</a>( cb, SIGNAL( activated( int ) ), table(), SLOT( doValueChanged() ) );
    cb-&gt;insertItem( "Yes" );
    cb-&gt;insertItem( "No" );
    // and initialize it
    cb-&gt;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-&gt;<a href="qobject.html#inherits">inherits</a>( "QComboBox" ) )
        <a href="qtableitem.html#setText">setText</a>( ( (QComboBox*)w )-&gt;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> &amp;s )
{
    if ( cb ) {
        // initialize the combobox from the text
        if ( s == "No" )
            cb-&gt;setCurrentItem( 1 );
        else
            cb-&gt;setCurrentItem( 0 );
    }
    QTableItem::<a href="qtableitem.html#setText">setText</a>( s );
}
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