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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/examples/table/statistics/statistics.doc:1 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><meta name="Translator" content="farfareast"><meta name="Qt zh_CN Documents Website" content="http://www.qiliang.net/qt"><title>表格样例</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; font-family: "Times New Roman" }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">主页</font></a> | <a href="classes.html"><font color="#004faf">所有的类</font></a> | <a href="mainclasses.html"><font color="#004faf">主要的类</font></a> | <a href="annotated.html"><font color="#004faf">注释的类</font></a> | <a href="groups.html"><font color="#004faf">分组的类</font></a> | <a href="functions.html"><font color="#004faf">函数</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>表格样例</h1> <p>另一个<a href="qtable.html">QTable</a>样例。<p> <hr><p>头文件：<p> <pre></pre><p> <hr><p>实现：<p> <pre>/****************************************************************************** $Id: qt/statistics.cpp 3.0.5 edited Feb 18 11:55 $**** 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 "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="f575"></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="f576"></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> qtdir = getenv( "QTDIR" ); while ( dirs[ i ] ) { <a href="qdir.html">QDir</a> dir( qtdir + "/src/" + dirs[ i ] );<a name="x2627"></a> <a href="qstringlist.html">QStringList</a> lst = dir.<a href="qdir.html#entryList">entryList</a>( "*.cpp; *.h" );<a name="x2638"></a><a name="x2636"></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="x2637"></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( qtdir + "/src/" + *it );<a name="x2628"></a> <a href="qtable.html#setText">setText</a>( i, 1, QString::number( 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="f577"></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="x2631"></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="x2633"></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="x2626"></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="f574"></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="x2632"></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="x2634"></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="x2630"></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="x2635"></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>主文件：<p> <pre>/****************************************************************************** $Id: qt/main.cpp 3.0.5 edited Oct 12 2001 $**** 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 "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>也参见<a href="table-examples.html">表格例程</a>。<!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td><a href="zh_CN.html">译者:farfareast</a><td align=right><div align=right>Qt 3.0.5版</div></table></div></address></body></html>⌨️ 快捷键说明
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