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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Tutorial - t11/lcdrange.cpp</title></head><body bgcolor="#ffffff"><p><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><p><h1 align=center>Source code for <a href="t11.html">tutorial 11</a>: lcdrange.cpp</h1><br clear="all"><hr> <pre>/******************************************************************** Implementation of LCDRange class, Qt tutorial 8******************************************************************/#include "lcdrange.h"#include <<a href="qslider-h.html">qslider.h</a>>#include <<a href="qlcdnumber-h.html">qlcdnumber.h</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->setRange( 0, 99 ); slider->setValue( 0 ); <a href="qobject.html#fbde73">connect</a>( slider, SIGNAL(valueChanged(int)), lcd, SLOT(display(int)) ); <a href="qobject.html#fbde73">connect</a>( slider, SIGNAL(valueChanged(int)), SIGNAL(valueChanged(int)) ); <a href="qwidget.html#cddadb">setFocusProxy</a>( slider );}int <a name="506"></a>LCDRange::value() const{ return slider->value();}void <a name="507"></a>LCDRange::setValue( int value ){ slider->setValue( value );}void <a name="508"></a>LCDRange::setRange( int minVal, int maxVal ){ if ( minVal < 0 || maxVal > 99 || minVal > maxVal ) { <a href="qapplication.html#290ef4">qWarning</a>( "<a name="508"></a>LCDRange::setRange(%d,%d)\n" "\tRange must be 0..99\n" "\tand minVal must not be greater than maxVal", minVal, maxVal ); return; } slider->setRange( minVal, maxVal );}</pre><p><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright ⌨️ 快捷键说明
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