sliderbox.cpp
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#include <qlabel.h>
#include <qlayout.h>
#include <qwt_slider.h>
#include <qwt_scale_engine.h>
#include <qwt_transform.h>
#include "sliderbox.h"
SliderBox::SliderBox( int sliderType, QWidget *parent ):
QWidget( parent )
{
d_slider = createSlider( sliderType );
QFlags<Qt::AlignmentFlag> alignment;
if ( d_slider->orientation() == Qt::Horizontal )
{
if ( d_slider->scalePosition() == QwtSlider::TrailingScale )
alignment = Qt::AlignBottom;
else
alignment = Qt::AlignTop;
alignment |= Qt::AlignHCenter;
}
else
{
if ( d_slider->scalePosition() == QwtSlider::TrailingScale )
alignment = Qt::AlignRight;
else
alignment = Qt::AlignLeft;
alignment |= Qt::AlignVCenter;
}
d_label = new QLabel( this );
d_label->setAlignment( alignment );
d_label->setFixedWidth( d_label->fontMetrics().width( "10000.9" ) );
connect( d_slider, SIGNAL( valueChanged( double ) ), SLOT( setNum( double ) ) );
QBoxLayout *layout;
if ( d_slider->orientation() == Qt::Horizontal )
layout = new QHBoxLayout( this );
else
layout = new QVBoxLayout( this );
layout->addWidget( d_slider );
layout->addWidget( d_label );
setNum( d_slider->value() );
}
QwtSlider *SliderBox::createSlider( int sliderType ) const
{
QwtSlider *slider = new QwtSlider();
switch( sliderType )
{
case 0:
{
slider->setOrientation( Qt::Horizontal );
slider->setScalePosition( QwtSlider::TrailingScale );
slider->setTrough( true );
slider->setGroove( false );
slider->setSpacing( 0 );
slider->setHandleSize( QSize( 30, 16 ) );
slider->setScale( 10.0, -10.0 );
slider->setTotalSteps( 8 );
slider->setSingleSteps( 1 );
slider->setPageSteps( 1 );
slider->setWrapping( true );
break;
}
case 1:
{
slider->setOrientation( Qt::Horizontal );
slider->setScalePosition( QwtSlider::NoScale );
slider->setTrough( true );
slider->setGroove( true );
slider->setScale( 0.0, 1.0 );
slider->setTotalSteps( 100 );
slider->setSingleSteps( 1 );
slider->setPageSteps( 5 );
break;
}
case 2:
{
slider->setOrientation( Qt::Horizontal );
slider->setScalePosition( QwtSlider::LeadingScale );
slider->setTrough( false );
slider->setGroove( true );
slider->setHandleSize( QSize( 12, 25 ) );
slider->setScale( 1000.0, 3000.0 );
slider->setTotalSteps( 200.0 );
slider->setSingleSteps( 2 );
slider->setPageSteps( 10 );
break;
}
case 3:
{
slider->setOrientation( Qt::Horizontal );
slider->setScalePosition( QwtSlider::TrailingScale );
slider->setTrough( true );
slider->setGroove( true );
QwtLinearScaleEngine *scaleEngine = new QwtLinearScaleEngine( 2 );
scaleEngine->setTransformation( new QwtPowerTransform( 2 ) );
slider->setScaleEngine( scaleEngine );
slider->setScale( 0.0, 128.0 );
slider->setTotalSteps( 100 );
slider->setStepAlignment( false );
slider->setSingleSteps( 1 );
slider->setPageSteps( 5 );
break;
}
case 4:
{
slider->setOrientation( Qt::Vertical );
slider->setScalePosition( QwtSlider::TrailingScale );
slider->setTrough( false );
slider->setGroove( true );
slider->setScale( 100.0, 0.0 );
slider->setInvertedControls( true );
slider->setTotalSteps( 100 );
slider->setPageSteps( 5 );
slider->setScaleMaxMinor( 5 );
break;
}
case 5:
{
slider->setOrientation( Qt::Vertical );
slider->setScalePosition( QwtSlider::NoScale );
slider->setTrough( true );
slider->setGroove( false );
slider->setScale( 0.0, 100.0 );
slider->setTotalSteps( 100 );
slider->setPageSteps( 10 );
break;
}
case 6:
{
slider->setOrientation( Qt::Vertical );
slider->setScalePosition( QwtSlider::LeadingScale );
slider->setTrough( true );
slider->setGroove( true );
slider->setScaleEngine( new QwtLogScaleEngine );
slider->setStepAlignment( false );
slider->setHandleSize( QSize( 20, 32 ) );
slider->setBorderWidth( 1 );
slider->setScale( 1.0, 1.0e4 );
slider->setTotalSteps( 100 );
slider->setPageSteps( 10 );
slider->setScaleMaxMinor( 9 );
break;
}
}
if ( slider )
{
QString name( "Slider %1" );
slider->setObjectName( name.arg( sliderType ) );
}
return slider;
}
void SliderBox::setNum( double v )
{
QString text;
text.setNum( v, 'f', 2 );
d_label->setText( text );
}