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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/doc/tutorial.doc:1706 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>t12/lcdrange.cpp Example File</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>t12/lcdrange.cpp Example File</h1> <pre>/******************************************************************** Implementation of LCDRange class, Qt tutorial 12******************************************************************/#include "lcdrange.h"#include <<a href="qslider-h.html">qslider.h</a>>#include <<a href="qlcdnumber-h.html">qlcdnumber.h</a>>#include <<a href="qlabel-h.html">qlabel.h</a>><a name="f67"></a>LCDRange::LCDRange( <a href="qwidget.html">QWidget</a> *parent, const char *name ) : <a href="qvbox.html">QVBox</a>( parent, name ){ init();}LCDRange::LCDRange( const char *s, QWidget *parent, const char *name ) : <a href="qvbox.html">QVBox</a>( parent, name ){ init(); setText( s );}void <a name="f68"></a>LCDRange::init(){ <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-><a href="qrangecontrol.html#setRange">setRange</a>( 0, 99 ); slider-><a href="qslider.html#setValue">setValue</a>( 0 ); label = new <a href="qlabel.html">QLabel</a>( " ", this, "label" ); label-><a href="qlabel.html#setAlignment">setAlignment</a>( AlignCenter ); <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="f69"></a>LCDRange::value() const{ return slider-><a href="qslider.html#value">value</a>();}const char *<a name="f70"></a>LCDRange::text() const{ return label-><a href="qlabel.html#text">text</a>();}void <a name="f71"></a>LCDRange::setValue( int value ){ slider-><a href="qslider.html#setValue">setValue</a>( value );}void <a name="f72"></a>LCDRange::setRange( int minVal, int maxVal ){ if ( minVal < 0 || maxVal > 99 || minVal > 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-><a href="qrangecontrol.html#setRange">setRange</a>( minVal, maxVal );}void <a name="f73"></a>LCDRange::setText( const char *s ){ label-><a href="qlabel.html#setText">setText</a>( s );}</pre><!-- 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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