source: trunk/doc/html/biff-example.html

Last change on this file was 190, checked in by rudi, 14 years ago

reference documentation added
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[190]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/biff/biff.doc:4 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>Biff (UNIX only)</title>
7<style type="text/css"><!--
8fn { margin-left: 1cm; text-indent: -1cm; }
9a:link { color: #004faf; text-decoration: none }
10a:visited { color: #672967; text-decoration: none }
11body { background: #ffffff; color: black; }
12--></style>
13</head>
14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
23 | <a href="mainclasses.html">
24<font color="#004faf">Main&nbsp;Classes</font></a>
25 | <a href="annotated.html">
26<font color="#004faf">Annotated</font></a>
27 | <a href="groups.html">
28<font color="#004faf">Grouped&nbsp;Classes</font></a>
29 | <a href="functions.html">
30<font color="#004faf">Functions</font></a>
31</td>
32<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>
33
34
35<p>
36Biff is a simple graphical program to indicate whether there is new
37mail; it looks exactly like xbiff but is much shorter.
38<p> <hr>
39<p> Header file:
40<p> <pre>/****************************************************************************
41** $Id: biff-example.html 2051 2007-02-21 10:04:20Z chehrlic $
42**
43** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
44**
45** This file is part of an example program for Qt. This example
46** program may be used, distributed and modified without limitation.
47**
48*****************************************************************************/
49
50#ifndef BIFF_H
51#define BIFF_H
52
53#include &lt;<a href="qwidget-h.html">qwidget.h</a>&gt;
54#include &lt;<a href="qdatetime-h.html">qdatetime.h</a>&gt;
55#include &lt;<a href="qpixmap-h.html">qpixmap.h</a>&gt;
56
57
58class Biff : public <a href="qwidget.html">QWidget</a>
59{
60 <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
61public:
62 Biff( <a href="qwidget.html">QWidget</a> *parent=0, const char *name=0 );
63
64protected:
65 void timerEvent( <a href="qtimerevent.html">QTimerEvent</a> * );
66 void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * );
67 void mousePressEvent( <a href="qmouseevent.html">QMouseEvent</a> * );
68
69private:
70 <a href="qdatetime.html">QDateTime</a> lastModified;
71 <a href="qpixmap.html">QPixmap</a> hasNewMail;
72 <a href="qpixmap.html">QPixmap</a> noNewMail;
73 <a href="qstring.html">QString</a> mailbox;
74 bool gotMail;
75};
76
77
78#endif // BIFF_H
79</pre>
80
81<p> <hr>
82<p> <em>biff.cpp</em> implements this custom widget. Note in particular
83how two images (<em>hasmail_bmp_data</em> and <em>nomail_bmp_data</em>, both from
84<em>bmp.cpp</em>) are included into the executable.
85<p> <pre>/****************************************************************************
86** $Id: biff-example.html 2051 2007-02-21 10:04:20Z chehrlic $
87**
88** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
89**
90** This file is part of an example program for Qt. This example
91** program may be used, distributed and modified without limitation.
92**
93*****************************************************************************/
94
95#include "biff.h"
96#include &lt;<a href="qstring-h.html">qstring.h</a>&gt;
97#include &lt;<a href="qfileinfo-h.html">qfileinfo.h</a>&gt;
98#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
99
100#include &lt;unistd.h&gt;
101#include &lt;stdlib.h&gt;
102
103#include "bmp.cpp"
104
105
106<a name="f527"></a>Biff::Biff( <a href="qwidget.html">QWidget</a> *parent, const char *name )
107 : <a href="qwidget.html">QWidget</a>( parent, name, WShowModal | WType_Dialog )
108{
109 <a href="qfileinfo.html">QFileInfo</a> fi = QString(getenv( "MAIL" ));
110<a name="x1955"></a> if ( !fi.<a href="qfileinfo.html#exists">exists</a>() ) {
111 <a href="qstring.html">QString</a> s( "/var/spool/mail/" );
112 s += getlogin();
113<a name="x1958"></a> fi.<a href="qfileinfo.html#setFile">setFile</a>( s );
114 }
115
116 if ( fi.<a href="qfileinfo.html#exists">exists</a>() ) {
117<a name="x1954"></a> mailbox = fi.<a href="qfileinfo.html#absFilePath">absFilePath</a>();
118 <a href="qobject.html#startTimer">startTimer</a>( 1000 );
119 }
120
121 <a href="qwidget.html#setMinimumSize">setMinimumSize</a>( 48, 48 );
122 <a href="qwidget.html#setMaximumSize">setMaximumSize</a>( 48, 48 );
123 <a href="qwidget.html#resize">resize</a>( 48, 48 );
124
125 hasNewMail.loadFromData( hasmail_bmp_data, hasmail_bmp_len );
126 noNewMail.loadFromData( nomail_bmp_data, nomail_bmp_len );
127
128 gotMail = FALSE;
129<a name="x1956"></a> lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>();
130}
131
132
133<a name="x1959"></a>void Biff::<a href="qobject.html#timerEvent">timerEvent</a>( <a href="qtimerevent.html">QTimerEvent</a> * )
134{
135 <a href="qfileinfo.html">QFileInfo</a> fi( mailbox );
136 bool newState = ( fi.<a href="qfileinfo.html#lastModified">lastModified</a>() != lastModified &amp;&amp;
137<a name="x1957"></a> fi.<a href="qfileinfo.html#lastModified">lastModified</a>() &gt; fi.<a href="qfileinfo.html#lastRead">lastRead</a>() );
138 if ( newState != gotMail ) {
139 if ( gotMail )
140 lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>();
141 gotMail = newState;
142 <a href="qwidget.html#repaint">repaint</a>( FALSE );
143 }
144}
145
146
147void Biff::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * )
148{
149 if ( gotMail )
150 <a href="qimage.html#bitBlt">bitBlt</a>( this, 0, 0, &amp;hasNewMail );
151 else
152 <a href="qimage.html#bitBlt">bitBlt</a>( this, 0, 0, &amp;noNewMail );
153}
154
155
156<a name="x1960"></a>void Biff::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> * )
157{
158 <a href="qfileinfo.html">QFileInfo</a> fi( mailbox );
159 lastModified = fi.<a href="qfileinfo.html#lastModified">lastModified</a>();
160}
161</pre>
162
163<p> <hr>
164<p> Main:
165<p> <pre>/****************************************************************************
166** $Id: biff-example.html 2051 2007-02-21 10:04:20Z chehrlic $
167**
168** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
169**
170** This file is part of an example program for Qt. This example
171** program may be used, distributed and modified without limitation.
172**
173*****************************************************************************/
174
175#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
176#include "biff.h"
177
178
179int main( int argc, char ** argv )
180{
181 <a href="qapplication.html">QApplication</a> a( argc, argv );
182 Biff b;
183 a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;b );
184 b.<a href="qwidget.html#show">show</a>();
185 return a.<a href="qapplication.html#exec">exec</a>();
186}
187</pre>
188
189<p>See also <a href="examples.html">Examples</a>.
190
191<!-- eof -->
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194<td>Copyright &copy; 2007
195<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
196<td align=right><div align=right>Qt 3.3.8</div>
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