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305 lines
11 KiB
305 lines
11 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /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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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Table Example</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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| <a href="mainclasses.html">
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<font color="#004faf">Main Classes</font></a>
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| <a href="annotated.html">
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<font color="#004faf">Annotated</font></a>
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| <a href="groups.html">
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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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>
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<p>
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Another <a href="qtable.html">QTable</a> example.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/statistics.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef STATISTICS_H
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#define STATISTICS_H
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#include <<a href="qtable-h.html">qtable.h</a>>
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#include <<a href="qcombobox-h.html">qcombobox.h</a>>
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class TableItem : public <a href="qtableitem.html">QTableItem</a>
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{
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public:
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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 ) {}
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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 );
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};
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class ComboItem : public <a href="qtableitem.html">QTableItem</a>
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{
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public:
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ComboItem( <a href="qtable.html">QTable</a> *t, EditType et );
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<a href="qwidget.html">QWidget</a> *createEditor() const;
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void setContentFromEditor( <a href="qwidget.html">QWidget</a> *w );
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void setText( const <a href="qstring.html">QString</a> &s );
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private:
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<a href="qcombobox.html">QComboBox</a> *cb;
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};
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class Table : public <a href="qtable.html">QTable</a>
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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public:
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Table();
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void sortColumn( int col, bool ascending, bool wholeRows );
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private slots:
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void recalcSum( int row, int col );
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private:
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void initTable();
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};
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#endif
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/statistics.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "statistics.h"
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#include <<a href="qdir-h.html">qdir.h</a>>
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#include <<a href="qstringlist-h.html">qstringlist.h</a>>
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#include <<a href="qheader-h.html">qheader.h</a>>
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#include <<a href="qcombobox-h.html">qcombobox.h</a>>
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#include <stdlib.h>
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const char* dirs[] = {
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"kernel",
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"tools",
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"widgets",
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"dialogs",
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"xml",
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"table",
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"network",
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"opengl",
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"canvas",
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0
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};
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<a name="f578"></a>Table::Table()
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: <a href="qtable.html">QTable</a>( 10, 100, 0, "table" )
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{
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<a href="qtable.html#setSorting">setSorting</a>( TRUE );
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<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 0, tr( "File" ) );
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<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 1, tr( "Size (bytes)" ) );
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<a href="qtable.html#horizontalHeader">horizontalHeader</a>()->setLabel( 2, tr( "Use in Sum" ) );
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initTable();
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<a href="qtable.html#adjustColumn">adjustColumn</a>( 0 );
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// if the user edited something we might need to recalculate the sum
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<a href="qobject.html#connect">connect</a>( this, SIGNAL( <a href="qtable.html#valueChanged">valueChanged</a>( int, int ) ),
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this, SLOT( recalcSum( int, int ) ) );
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}
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void <a name="f579"></a>Table::initTable()
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{
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// read all the Qt source and header files into a list
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<a href="qstringlist.html">QStringList</a> all;
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int i = 0;
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<a href="qstring.html">QString</a> srcdir( "../../../src/" );
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while ( dirs[ i ] ) {
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<a href="qdir.html">QDir</a> dir( srcdir + dirs[ i ] );
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<a name="x2780"></a> <a href="qstringlist.html">QStringList</a> lst = dir.<a href="qdir.html#entryList">entryList</a>( "*.cpp; *.h" );
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<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 ) {
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if ( ( *it ).contains( "moc" ) )
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continue;
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all << (QString( dirs[ i ] ) + "/" + *it);
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}
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++i;
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}
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// set the number of rows we'll need for the table
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<a name="x2790"></a> <a href="qtable.html#setNumRows">setNumRows</a>( all.<a href="qvaluelist.html#count">count</a>() + 1 );
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i = 0;
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int sum = 0;
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// insert the data into the table
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for ( QStringList::Iterator it = all.<a href="qvaluelist.html#begin">begin</a>(); it != all.<a href="qvaluelist.html#end">end</a>(); ++it ) {
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<a href="qtable.html#setText">setText</a>( i, 0, *it );
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<a href="qfile.html">QFile</a> f( srcdir + *it );
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<a name="x2781"></a> <a href="qtable.html#setText">setText</a>( i, 1, QString::number( (ulong)f.<a href="qfile.html#size">size</a>() ) );
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ComboItem *ci = new ComboItem( this, QTableItem::WhenCurrent );
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<a href="qtable.html#setItem">setItem</a>( i++, 2, ci );
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sum += f.<a href="qfile.html#size">size</a>();
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}
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// last row should show the sum
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TableItem *i1 = new TableItem( this, QTableItem::Never, tr( "Sum" ) );
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<a href="qtable.html#setItem">setItem</a>( i, 0, i1 );
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TableItem *i2 = new TableItem( this, QTableItem::Never, QString::number( sum ) );
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<a href="qtable.html#setItem">setItem</a>( i, 1, i2 );
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}
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void <a name="f580"></a>Table::recalcSum( int, int col )
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{
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// only recalc if a value in the second or third column changed
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if ( col < 1 || col > 2 )
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return;
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// recalc sum
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int sum = 0;
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for ( int i = 0; i < numRows() - 1; ++i ) {
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if ( <a href="qtableitem.html#text">text</a>( i, 2 ) == "No" )
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continue;
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sum += <a href="qtableitem.html#text">text</a>( i, 1 ).toInt();
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}
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// insert calculated data
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TableItem *i1 = new TableItem( this, QTableItem::Never, tr( "Sum" ) );
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setItem( numRows() - 1, 0, i1 );
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TableItem *i2 = new TableItem( this, QTableItem::Never, QString::number( sum ) );
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setItem( numRows() - 1, 1, i2 );
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}
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<a name="x2784"></a>void Table::<a href="qtable.html#sortColumn">sortColumn</a>( int col, bool ascending, bool /*wholeRows*/ )
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{
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// sum row should not be sorted, so get rid of it for now
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clearCell( numRows() - 1, 0 );
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clearCell( numRows() - 1, 1 );
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// do sort
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QTable::<a href="qtable.html#sortColumn">sortColumn</a>( col, ascending, TRUE );
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// re-insert sum row
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recalcSum( 0, 1 );
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}
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<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 )
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{
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<a href="qcolorgroup.html">QColorGroup</a> g( cg );
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// last row is the sum row - we want to make it more visible by
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// using a red background
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if ( <a href="qtableitem.html#row">row</a>() == <a href="qtableitem.html#table">table</a>()->numRows() - 1 )
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<a name="x2779"></a> g.<a href="qcolorgroup.html#setColor">setColor</a>( QColorGroup::Base, red );
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QTableItem::<a href="qtableitem.html#paint">paint</a>( p, g, cr, selected );
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}
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<a name="f577"></a>ComboItem::ComboItem( <a href="qtable.html">QTable</a> *t, EditType et )
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: <a href="qtableitem.html">QTableItem</a>( t, et, "Yes" ), cb( 0 )
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{
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// we do not want this item to be replaced
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<a href="qtableitem.html#setReplaceable">setReplaceable</a>( FALSE );
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}
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<a name="x2785"></a>QWidget *ComboItem::<a href="qtableitem.html#createEditor">createEditor</a>() const
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{
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// create an editor - a combobox in our case
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( (ComboItem*)this )->cb = new <a href="qcombobox.html">QComboBox</a>( <a href="qtableitem.html#table">table</a>()->viewport() );
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QObject::<a href="qobject.html#connect">connect</a>( cb, SIGNAL( activated( int ) ), table(), SLOT( doValueChanged() ) );
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cb->insertItem( "Yes" );
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cb->insertItem( "No" );
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// and initialize it
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cb->setCurrentItem( <a href="qtableitem.html#text">text</a>() == "No" ? 1 : 0 );
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return cb;
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}
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<a name="x2787"></a>void ComboItem::<a href="qtableitem.html#setContentFromEditor">setContentFromEditor</a>( <a href="qwidget.html">QWidget</a> *w )
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{
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// the user changed the value of the combobox, so synchronize the
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// value of the item (its text), with the value of the combobox
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<a name="x2783"></a> if ( w-><a href="qobject.html#inherits">inherits</a>( "QComboBox" ) )
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<a href="qtableitem.html#setText">setText</a>( ( (QComboBox*)w )->currentText() );
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else
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QTableItem::<a href="qtableitem.html#setContentFromEditor">setContentFromEditor</a>( w );
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}
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<a name="x2788"></a>void ComboItem::<a href="qtableitem.html#setText">setText</a>( const <a href="qstring.html">QString</a> &s )
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{
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if ( cb ) {
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// initialize the combobox from the text
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if ( s == "No" )
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cb->setCurrentItem( 1 );
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else
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cb->setCurrentItem( 0 );
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}
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QTableItem::<a href="qtableitem.html#setText">setText</a>( s );
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}
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||
|
|
</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"
|
||
|
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#include <<a href="qapplication-h.html">qapplication.h</a>>
|
||
|
|
int main( int argc, char **argv )
|
||
|
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{
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<a href="qapplication.html">QApplication</a> a(argc,argv);
|
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|
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Table t;
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a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &t );
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t.<a href="qwidget.html#show">show</a>();
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return a.<a href="qapplication.html#exec">exec</a>();
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||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
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<p>See also <a href="table-examples.html">Table Examples</a>.
|
||
|
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|
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<!-- eof -->
|
||
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<p><address><hr><div align=center>
|
||
|
|
<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>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|