biff-example.html
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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/biff/biff.doc:4 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Biff (UNIX only)</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; }--></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">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</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>Biff (UNIX only)</h1> <p> Biff is a simple graphical program to indicate whether there is newmail; it looks exactly like xbiff but is much shorter.<p> <hr><p> Header file:<p> <pre>/****************************************************************************** $Id: qt/biff.h 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.*******************************************************************************/#ifndef BIFF_H#define BIFF_H#include <<a href="qwidget-h.html">qwidget.h</a>>#include <<a href="qdatetime-h.html">qdatetime.h</a>>#include <<a href="qpixmap-h.html">qpixmap.h</a>>class Biff : public <a href="qwidget.html">QWidget</a>{ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>public: Biff( <a href="qwidget.html">QWidget</a> *parent=0, const char *name=0 );protected: void timerEvent( <a href="qtimerevent.html">QTimerEvent</a> * ); void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * ); void mousePressEvent( <a href="qmouseevent.html">QMouseEvent</a> * );private: <a href="qdatetime.html">QDateTime</a> lastModified; <a href="qpixmap.html">QPixmap</a> hasNewMail; <a href="qpixmap.html">QPixmap</a> noNewMail; <a href="qstring.html">QString</a> mailbox; bool gotMail;};#endif // BIFF_H</pre><p> <hr><p> <em>biff.cpp</em> implements this custom widget. Note in particularhow two images (<em>hasmail_bmp_data</em> and <em>nomail_bmp_data</em>, both from<em>bmp.cpp</em>) are included into the executable.<p> <pre>/****************************************************************************** $Id: qt/biff.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 "biff.h"#include <<a href="qstring-h.html">qstring.h</a>>#include <<a href="qfileinfo-h.html">qfileinfo.h</a>>#include <<a href="qpainter-h.html">qpainter.h</a>>#include <unistd.h>#include <stdlib.h>#include "bmp.cpp"<a name="f526"></a>Biff::Biff( <a href="qwidget.html">QWidget</a> *parent, const char *name ) : <a href="qwidget.html">QWidget</a>( parent, name, WType_Modal ){ <a href="qfileinfo.html">QFileInfo</a> fi = QString(getenv( "MAIL" ));<a name="x1941"></a> if ( !fi.<a href="qfileinfo.html#exists">exists</a>() ) { <a href="qstring.html">QString</a> s( "/var/spool/mail/" ); s += getlogin();<a name="x1944"></a> fi.<a href="qfileinfo.html#setFile">setFile</a>( s ); } if ( fi.<a href="qfileinfo.html#exists">exists</a>() ) {<a name="x1940"></a> mailbox = fi.<a href="qfileinfo.html#absFilePath">absFilePath</a>(); <a href="qobject.html#startTimer">startTimer</a>( 1000 ); } <a href="qwidget.html#setMinimumSize">setMinimumSize</a>( 48, 48 ); <a href="qwidget.html#setMaximumSize">setMaximumSize</a>( 48, 48 ); <a href="qwidget.html#resize">resize</a>( 48, 48 ); hasNewMail.loadFromData( hasmail_bmp_data, hasmail_bmp_len ); noNewMail.loadFromData( nomail_bmp_data, nomail_bmp_len ); gotMail = FALSE;<a name="x1942"></a> lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>();}<a name="x1945"></a>void Biff::<a href="qobject.html#timerEvent">timerEvent</a>( <a href="qtimerevent.html">QTimerEvent</a> * ){ <a href="qfileinfo.html">QFileInfo</a> fi( mailbox ); bool newState = ( fi.<a href="qfileinfo.html#lastModified">lastModified</a>() != lastModified &&<a name="x1943"></a> fi.<a href="qfileinfo.html#lastModified">lastModified</a>() > fi.<a href="qfileinfo.html#lastRead">lastRead</a>() ); if ( newState != gotMail ) { if ( gotMail ) lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>(); gotMail = newState; <a href="qwidget.html#repaint">repaint</a>( FALSE ); }}void Biff::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * ){ if ( gotMail ) <a href="qpaintdevice.html#bitBlt-2">bitBlt</a>( this, 0, 0, &hasNewMail ); else <a href="qpaintdevice.html#bitBlt-2">bitBlt</a>( this, 0, 0, &noNewMail );}<a name="x1946"></a>void Biff::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> * ){ <a href="qfileinfo.html">QFileInfo</a> fi( mailbox ); lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>();}</pre><p> <hr><p> Main:<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 <<a href="qapplication-h.html">qapplication.h</a>>#include "biff.h"int main( int argc, char ** argv ){ <a href="qapplication.html">QApplication</a> a( argc, argv ); Biff b; a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &b ); b.<a href="qwidget.html#show">show</a>();<a name="x1948"></a> return a.<a href="qapplication.html#exec">exec</a>();}</pre><p>See also <a href="examples.html">Examples</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 align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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