tunerfrm.cpp
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#include <qlayout.h>
#include <qlabel.h>
#include <qwt_wheel.h>
#include <qwt_slider.h>
#include <qwt_thermo.h>
#include <qwt_math.h>
#include "tunerfrm.h"
#if QT_VERSION < 0x040600
#define qFastSin(x) ::sin(x)
#define qFastCos(x) ::cos(x)
#endif
class TuningThermo: public QWidget
{
public:
TuningThermo( QWidget *parent ):
QWidget( parent )
{
d_thermo = new QwtThermo( this );
d_thermo->setOrientation( Qt::Horizontal, QwtThermo::NoScale );
d_thermo->setScale( 0.0, 1.0 );
d_thermo->setFillBrush( Qt::green );
QLabel *label = new QLabel( "Tuning", this );
label->setAlignment( Qt::AlignCenter );
QVBoxLayout *layout = new QVBoxLayout( this );
layout->setMargin( 0 );
layout->addWidget( d_thermo );
layout->addWidget( label );
setFixedWidth( 3 * label->sizeHint().width() );
}
void setValue( double value )
{
d_thermo->setValue( value );
}
private:
QwtThermo *d_thermo;
};
TunerFrame::TunerFrame( QWidget *parent ):
QFrame( parent )
{
const double freqMin = 87.5;
const double freqMax = 108;
d_sliderFrequency = new QwtSlider( this );
d_sliderFrequency->setOrientation( Qt::Horizontal );
d_sliderFrequency->setScalePosition( QwtSlider::TrailingScale );
d_sliderFrequency->setScale( freqMin, freqMax );
d_sliderFrequency->setTotalSteps(
qRound( ( freqMax - freqMin ) / 0.01 ) );
d_sliderFrequency->setSingleSteps( 1 );
d_sliderFrequency->setPageSteps( 10 );
d_sliderFrequency->setScaleMaxMinor( 5 );
d_sliderFrequency->setScaleMaxMajor( 12 );
d_sliderFrequency->setHandleSize( QSize( 80, 20 ) );
d_sliderFrequency->setBorderWidth( 1 );
d_thermoTune = new TuningThermo( this );
d_wheelFrequency = new QwtWheel( this );
d_wheelFrequency->setMass( 0.5 );
d_wheelFrequency->setRange( 87.5, 108 );
d_wheelFrequency->setSingleStep( 0.01 );
d_wheelFrequency->setPageStepCount( 10 );
d_wheelFrequency->setTotalAngle( 3600.0 );
d_wheelFrequency->setFixedHeight( 30 );
connect( d_wheelFrequency, SIGNAL( valueChanged( double ) ), SLOT( adjustFreq( double ) ) );
connect( d_sliderFrequency, SIGNAL( valueChanged( double ) ), SLOT( adjustFreq( double ) ) );
QVBoxLayout *mainLayout = new QVBoxLayout( this );
mainLayout->setMargin( 10 );
mainLayout->setSpacing( 5 );
mainLayout->addWidget( d_sliderFrequency );
QHBoxLayout *hLayout = new QHBoxLayout;
hLayout->setMargin( 0 );
hLayout->addWidget( d_thermoTune, 0 );
hLayout->addStretch( 5 );
hLayout->addWidget( d_wheelFrequency, 2 );
mainLayout->addLayout( hLayout );
}
void TunerFrame::adjustFreq( double frq )
{
const double factor = 13.0 / ( 108 - 87.5 );
const double x = ( frq - 87.5 ) * factor;
const double field = qwtSqr( qFastSin( x ) * qFastCos( 4.0 * x ) );
d_thermoTune->setValue( field );
if ( d_sliderFrequency->value() != frq )
d_sliderFrequency->setValue( frq );
if ( d_wheelFrequency->value() != frq )
d_wheelFrequency->setValue( frq );
Q_EMIT fieldChanged( field );
}
void TunerFrame::setFreq( double frq )
{
d_wheelFrequency->setValue( frq );
}