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32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t13/lcdrange.cpp Example File</h1>
33
34
35<pre>/****************************************************************
36**
37** Implementation of LCDRange class, Qt tutorial 12
38**
39****************************************************************/
40
41#include "lcdrange.h"
42
43#include &lt;<a href="qslider-h.html">qslider.h</a>&gt;
44#include &lt;<a href="qlcdnumber-h.html">qlcdnumber.h</a>&gt;
45#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
46#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;
47
48
49<a name="f87"></a>LCDRange::LCDRange( <a href="qwidget.html">QWidget</a> *parent, const char *name )
50 : <a href="qwidget.html">QWidget</a>( parent, name )
51{
52 init();
53}
54
55
56LCDRange::LCDRange( const char *s, QWidget *parent, const char *name )
57 : <a href="qwidget.html">QWidget</a>( parent, name )
58{
59 init();
60 setText( s );
61}
62
63
64void <a name="f88"></a>LCDRange::init()
65{
66 <a href="qlcdnumber.html">QLCDNumber</a> *lcd = new <a href="qlcdnumber.html">QLCDNumber</a>( 2, this, "lcd" );
67 slider = new <a href="qslider.html">QSlider</a>( Horizontal, this, "slider" );
68 slider-&gt;<a href="qrangecontrol.html#setRange">setRange</a>( 0, 99 );
69 slider-&gt;<a href="qslider.html#setValue">setValue</a>( 0 );
70
71 label = new <a href="qlabel.html">QLabel</a>( " ", this, "label" );
72 label-&gt;<a href="qlabel.html#setAlignment">setAlignment</a>( AlignCenter );
73
74 <a href="qobject.html#connect">connect</a>( slider, SIGNAL(<a href="qslider.html#valueChanged">valueChanged</a>(int)),
75 lcd, SLOT(<a href="qlcdnumber.html#display">display</a>(int)) );
76 <a href="qobject.html#connect">connect</a>( slider, SIGNAL(<a href="qslider.html#valueChanged">valueChanged</a>(int)),
77 SIGNAL(valueChanged(int)) );
78
79 <a href="qwidget.html#setFocusProxy">setFocusProxy</a>( slider );
80
81 <a href="qvboxlayout.html">QVBoxLayout</a> * l = new <a href="qvboxlayout.html">QVBoxLayout</a>( this );
82 l-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( lcd, 1 );
83 l-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( slider );
84 l-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( label );
85}
86
87
88int <a name="f89"></a>LCDRange::value() const
89{
90 return slider-&gt;<a href="qslider.html#value">value</a>();
91}
92
93
94const char *<a name="f90"></a>LCDRange::text() const
95{
96 return label-&gt;<a href="qlabel.html#text">text</a>();
97}
98
99
100void <a name="f91"></a>LCDRange::setValue( int value )
101{
102 slider-&gt;<a href="qslider.html#setValue">setValue</a>( value );
103}
104
105
106void <a name="f92"></a>LCDRange::setRange( int minVal, int maxVal )
107{
108 if ( minVal &lt; 0 || maxVal &gt; 99 || minVal &gt; maxVal ) {
109 <a href="qapplication.html#qWarning">qWarning</a>( "LCDRange::setRange(%d,%d)\n"
110 "\tRange must be 0..99\n"
111 "\tand minVal must not be greater than maxVal",
112 minVal, maxVal );
113 return;
114 }
115 slider-&gt;<a href="qrangecontrol.html#setRange">setRange</a>( minVal, maxVal );
116}
117
118
119void <a name="f93"></a>LCDRange::setText( const char *s )
120{
121 label-&gt;<a href="qlabel.html#setText">setText</a>( s );
122}
123</pre><!-- eof -->
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