doc/html/t9-lcdrange-cpp.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial.doc:1148 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>t9/lcdrange.cpp Example File</title>
<style type="text/css"><!--
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&nbsp;Classes</font></a>
 | <a href="mainclasses.html">
<font color="#004faf">Main&nbsp;Classes</font></a>
 | <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
 | <a href="groups.html">
<font color="#004faf">Grouped&nbsp;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>t9/lcdrange.cpp Example File</h1>

 
<pre>/****************************************************************
**
** Implementation of LCDRange class, Qt tutorial 8
**
****************************************************************/

#include "lcdrange.h"

#include &lt;<a href="qslider-h.html">qslider.h</a>&gt;
#include &lt;<a href="qlcdnumber-h.html">qlcdnumber.h</a>&gt;

<a name="f37"></a>LCDRange::LCDRange( <a href="qwidget.html">QWidget</a> *parent, const char *name )
        : <a href="qvbox.html">QVBox</a>( parent, name )
{
    <a href="qlcdnumber.html">QLCDNumber</a> *lcd  = new <a href="qlcdnumber.html">QLCDNumber</a>( 2, this, "lcd"  );
    slider = new <a href="qslider.html">QSlider</a>( Horizontal, this, "slider" );
    slider-&gt;<a href="qrangecontrol.html#setRange">setRange</a>( 0, 99 );
    slider-&gt;<a href="qslider.html#setValue">setValue</a>( 0 );
    <a href="qobject.html#connect">connect</a>( slider, SIGNAL(<a href="qslider.html#valueChanged">valueChanged</a>(int)),
             lcd, SLOT(<a href="qlcdnumber.html#display">display</a>(int)) );
    <a href="qobject.html#connect">connect</a>( slider, SIGNAL(<a href="qslider.html#valueChanged">valueChanged</a>(int)),
             SIGNAL(valueChanged(int)) );

    <a href="qwidget.html#setFocusProxy">setFocusProxy</a>( slider );
}

int <a name="f38"></a>LCDRange::value() const
{
    return slider-&gt;<a href="qslider.html#value">value</a>();
}

void <a name="f39"></a>LCDRange::setValue( int value )
{
    slider-&gt;<a href="qslider.html#setValue">setValue</a>( value );
}

void <a name="f40"></a>LCDRange::setRange( int minVal, int maxVal )
{
    if ( minVal &lt; 0 || maxVal &gt; 99 || minVal &gt; maxVal ) {
      <a href="qapplication.html#qWarning">qWarning</a>( "LCDRange::setRange(%d,%d)\n"
               "\tRange must be 0..99\n"
               "\tand minVal must not be greater than maxVal",
               minVal, maxVal );
      return;
    }
    slider-&gt;<a href="qrangecontrol.html#setRange">setRange</a>( minVal, maxVal );
}
</pre><!-- eof -->
<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright &copy; 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>