dialbox.cpp
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#include <qlabel.h>
#include <qlayout.h>
#include <qwt_dial.h>
#include <qwt_dial_needle.h>
#include <qwt_scale_engine.h>
#include <qwt_transform.h>
#include <qwt_round_scale_draw.h>
#include "dialbox.h"
DialBox::DialBox( QWidget *parent, int type ):
QWidget( parent )
{
d_dial = createDial( type );
d_label = new QLabel( this );
d_label->setAlignment( Qt::AlignCenter );
QVBoxLayout *layout = new QVBoxLayout( this );;
layout->setSpacing( 0 );
layout->addWidget( d_dial, 10 );
layout->addWidget( d_label );
connect( d_dial, SIGNAL( valueChanged( double ) ),
this, SLOT( setNum( double ) ) );
setNum( d_dial->value() );
}
QwtDial *DialBox::createDial( int type ) const
{
QwtDial *dial = new QwtDial();
dial->setTracking( true );
dial->setFocusPolicy( Qt::StrongFocus );
dial->setObjectName( QString( "Dial %1" ).arg( type + 1 ) );
QColor needleColor( Qt::red );
switch( type )
{
case 0:
{
dial->setOrigin( 135.0 );
dial->setScaleArc( 0.0, 270.0 );
dial->setScaleMaxMinor( 4 );
dial->setScaleMaxMajor( 10 );
dial->setScale( -100.0, 100.0 );
needleColor = QColor( "Goldenrod" );
break;
}
case 1:
{
dial->setOrigin( 135.0 );
dial->setScaleArc( 0.0, 270.0 );
dial->setScaleMaxMinor( 10 );
dial->setScaleMaxMajor( 10 );
dial->setScale( 10.0, 0.0 );
QwtRoundScaleDraw *scaleDraw = new QwtRoundScaleDraw();
scaleDraw->setSpacing( 8 );
scaleDraw->enableComponent(
QwtAbstractScaleDraw::Backbone, false );
scaleDraw->setTickLength( QwtScaleDiv::MinorTick, 2 );
scaleDraw->setTickLength( QwtScaleDiv::MediumTick, 4 );
scaleDraw->setTickLength( QwtScaleDiv::MajorTick, 8 );
dial->setScaleDraw( scaleDraw );
break;
}
case 2:
{
dial->setOrigin( 150.0 );
dial->setScaleArc( 0.0, 240.0 );
QwtLinearScaleEngine *scaleEngine = new QwtLinearScaleEngine( 2 );
scaleEngine->setTransformation( new QwtPowerTransform( 2 ) );
dial->setScaleEngine( scaleEngine );
QList< double > ticks[ QwtScaleDiv::NTickTypes ];
ticks[ QwtScaleDiv::MajorTick ] << 0 << 4
<< 16 << 32 << 64 << 96 << 128;
ticks[ QwtScaleDiv::MediumTick ] << 24 << 48 << 80 << 112;
ticks[ QwtScaleDiv::MinorTick ]
<< 0.5 << 1 << 2
<< 7 << 10 << 13
<< 20 << 28
<< 40 << 56
<< 72 << 88
<< 104 << 120;
dial->setScale( QwtScaleDiv( 0, 128, ticks ) );
break;
}
case 3:
{
dial->setOrigin( 135.0 );
dial->setScaleArc( 0.0, 270.0 );
dial->setScaleMaxMinor( 9 );
dial->setScaleEngine( new QwtLogScaleEngine );
dial->setScale( 1.0e-2, 1.0e2 );
break;
}
case 4:
{
dial->setOrigin( 225.0 );
dial->setScaleArc( 0.0, 360.0 );
dial->setScaleMaxMinor( 5 );
dial->setScaleStepSize( 20 );
dial->setScale( 100.0, -100.0 );
dial->setWrapping( true );
dial->setTotalSteps( 40 );
dial->setMode( QwtDial::RotateScale );
dial->setValue( 70.0 );
needleColor = QColor( "DarkSlateBlue" );
break;
}
case 5:
{
dial->setOrigin( 45.0 );
dial->setScaleArc( 0.0, 225.0 );
dial->setScaleMaxMinor( 5 );
dial->setScaleMaxMajor( 10 );
dial->setScale( 0.0, 10.0 );
break;
}
}
QwtDialSimpleNeedle *needle = new QwtDialSimpleNeedle(
QwtDialSimpleNeedle::Arrow, true, needleColor,
QColor( Qt::gray ).light( 130 ) );
dial->setNeedle( needle );
//const QColor base( QColor( "DimGray" ) );
const QColor base( QColor( Qt::darkGray ).dark( 150 ) );
QPalette palette;
palette.setColor( QPalette::Base, base );
palette.setColor( QPalette::Window, base.dark( 150 ) );
palette.setColor( QPalette::Mid, base.dark( 110 ) );
palette.setColor( QPalette::Light, base.light( 170 ) );
palette.setColor( QPalette::Dark, base.dark( 170 ) );
palette.setColor( QPalette::Text, base.dark( 200 ).light( 800 ) );
palette.setColor( QPalette::WindowText, base.dark( 200 ) );
dial->setPalette( palette );
dial->setLineWidth( 4 );
dial->setFrameShadow( QwtDial::Sunken );
return dial;
}
void DialBox::setNum( double v )
{
QString text;
text.setNum( v, 'f', 2 );
d_label->setText( text );
}