doc/html/t10-lcdrange-cpp.html


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<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="f44"></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="f45"></a>LCDRange::value() const
{
    return slider-&gt;<a href="qslider.html#value">value</a>();
}

void <a name="f46"></a>LCDRange::setValue( int value )
{
    slider-&gt;<a href="qslider.html#setValue">setValue</a>( value );
}

void <a name="f47"></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 );
}
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