lcdrange.cpp

我在我的EP9315上写的两个QT程序

#include "lcdrange.h"

#include <qslider.h>
#include <qlcdnumber.h>
#include <qlabel.h>

LCDRange::LCDRange( QWidget *parent,const char *name )
        :QVBox( parent, name)
{
  init();
}


LCDRange::LCDRange(const char * s, QWidget *parent,const char *name )
       :QVBox( parent, name) 
{
 init();
 setText( s );
}

void LCDRange::init()
{ 
 QLCDNumber *lcd=new QLCDNumber( 2,this,"lcd" );
 slider= new QSlider( Horizontal,this,"slider" );
 slider->setRange( 0,99 );
 slider->setValue( 0 );
 label = new QLabel( "", this, "label" );
 label-> setAlignment ( AlignCenter );
 connect( slider, SIGNAL(valueChanged(int)),lcd,SLOT(display(int)) );
 connect( slider,SIGNAL(valueChanged(int)),SIGNAL(valueChanged(int)) );

 setFocusProxy( slider );
 
}

int LCDRange::value() const
{
 return slider->value();
}
void LCDRange::setValue( int value )
{
 slider->setValue( value );
}

const char * LCDRange::text() const
{
 return label->text( );
}

void LCDRange::setRange(int minVal, int maxVal )
{
 if( minVal < 0 || maxVal > 99 || minVal >maxVal ){
  qWarning( "LCDRange::setRange(%d,%d)\n"
            "\tRange must be0..99\n"
            "\tand minVal must not be greater than maxVal",
            minVal,maxVal );
  return;
 }
 slider->setRange( minVal,maxVal );
}

void LCDRange::setText( const char * s )
{
 label->setText( s );
}