120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
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#include <qlabel.h>
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#include <qlayout.h>
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#include <qwt_knob.h>
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#include <qwt_scale_engine.h>
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#include <qwt_transform.h>
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#include "knobbox.h"
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KnobBox::KnobBox( QWidget *parent, int knobType ):
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QWidget( parent )
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{
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d_knob = createKnob( knobType );
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d_knob->setKnobWidth( 100 );
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d_label = new QLabel( this );
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d_label->setAlignment( Qt::AlignCenter );
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QVBoxLayout *layout = new QVBoxLayout( this );;
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layout->setSpacing( 0 );
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layout->addWidget( d_knob, 10 );
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layout->addWidget( d_label );
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layout->addStretch( 10 );
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connect( d_knob, SIGNAL( valueChanged( double ) ),
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this, SLOT( setNum( double ) ) );
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setNum( d_knob->value() );
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}
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QwtKnob *KnobBox::createKnob( int knobType ) const
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{
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QwtKnob *knob = new QwtKnob();
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knob->setTracking( true );
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switch( knobType )
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{
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case 0:
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{
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knob->setKnobStyle( QwtKnob::Sunken );
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knob->setMarkerStyle( QwtKnob::Nub );
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knob->setWrapping( true );
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knob->setNumTurns( 4 );
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knob->setScaleStepSize( 10.0 );
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knob->setScale( 0, 400 );
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knob->setTotalSteps( 400 );
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break;
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}
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case 1:
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{
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knob->setKnobStyle( QwtKnob::Sunken );
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knob->setMarkerStyle( QwtKnob::Dot );
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break;
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}
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case 2:
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{
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knob->setKnobStyle( QwtKnob::Sunken );
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knob->setMarkerStyle( QwtKnob::Tick );
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QwtLinearScaleEngine *scaleEngine = new QwtLinearScaleEngine( 2 );
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scaleEngine->setTransformation( new QwtPowerTransform( 2 ) );
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knob->setScaleEngine( scaleEngine );
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QList< double > ticks[ QwtScaleDiv::NTickTypes ];
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ticks[ QwtScaleDiv::MajorTick ] << 0 << 4
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<< 16 << 32 << 64 << 96 << 128;
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ticks[ QwtScaleDiv::MediumTick ] << 24 << 48 << 80 << 112;
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ticks[ QwtScaleDiv::MinorTick ]
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<< 0.5 << 1 << 2
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<< 7 << 10 << 13
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<< 20 << 28
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<< 40 << 56
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<< 72 << 88
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<< 104 << 120;
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knob->setScale( QwtScaleDiv( 0, 128, ticks ) );
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knob->setTotalSteps( 100 );
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knob->setStepAlignment( false );
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knob->setSingleSteps( 1 );
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knob->setPageSteps( 5 );
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break;
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}
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case 3:
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{
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knob->setKnobStyle( QwtKnob::Flat );
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knob->setMarkerStyle( QwtKnob::Notch );
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knob->setScaleEngine( new QwtLogScaleEngine() );
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knob->setScaleStepSize( 1.0 );
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knob->setScale( 0.1, 1000.0 );
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knob->setScaleMaxMinor( 10 );
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break;
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}
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case 4:
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{
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knob->setKnobStyle( QwtKnob::Raised );
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knob->setMarkerStyle( QwtKnob::Dot );
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knob->setWrapping( true );
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break;
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}
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case 5:
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{
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knob->setKnobStyle( QwtKnob::Styled );
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knob->setMarkerStyle( QwtKnob::Triangle );
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knob->setTotalAngle( 180.0 );
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knob->setScale( 100, -100 );
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break;
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}
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}
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return knob;
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}
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void KnobBox::setNum( double v )
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{
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QString text;
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text.setNum( v, 'f', 2 );
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d_label->setText( text );
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}
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