doc/html/t12-lcdrange-cpp.html


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<pre>/****************************************************************
**
** Implementation of LCDRange class, Qt tutorial 12
**
****************************************************************/

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


<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-&gt;<a href="qrangecontrol.html#setRange">setRange</a>( 0, 99 );
    slider-&gt;<a href="qslider.html#setValue">setValue</a>( 0 );

    label = new <a href="qlabel.html">QLabel</a>( " ", this, "label"  );
    label-&gt;<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-&gt;<a href="qslider.html#value">value</a>();
}


const char *<a name="f70"></a>LCDRange::text() const
{
    return label-&gt;<a href="qlabel.html#text">text</a>();
}


void <a name="f71"></a>LCDRange::setValue( int value )
{
    slider-&gt;<a href="qslider.html#setValue">setValue</a>( value );
}


void <a name="f72"></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 );
}


void <a name="f73"></a>LCDRange::setText( const char *s )
{
    label-&gt;<a href="qlabel.html#setText">setText</a>( s );
}
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