132 lines
3.6 KiB
C++
132 lines
3.6 KiB
C++
/*****************************************************************************
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* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
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* This file may be used under the terms of the 3-clause BSD License
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*****************************************************************************/
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#include "WheelBox.h"
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#include <QwtWheel>
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#include <QLabel>
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#include <QLCDNumber>
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#include <QLayout>
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#include <QWheelEvent>
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#include <QApplication>
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namespace
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{
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class Wheel : public QwtWheel
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{
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public:
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Wheel( QWidget* parent )
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: QwtWheel( parent )
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, m_ignoreWheelEvent( false )
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{
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setFocusPolicy( Qt::WheelFocus );
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parent->installEventFilter( this );
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}
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virtual bool eventFilter( QObject* object, QEvent* event ) QWT_OVERRIDE
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{
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if ( event->type() == QEvent::Wheel && !m_ignoreWheelEvent )
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{
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const QWheelEvent* we = static_cast< QWheelEvent* >( event );
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const QPoint pos = wheelRect().center();
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#if QT_VERSION >= 0x050c00
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QWheelEvent wheelEvent(
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pos, mapToGlobal( pos ),
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we->pixelDelta(), we->angleDelta(),
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we->buttons(), we->modifiers(),
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we->phase(), we->inverted() );
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#else
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QWheelEvent wheelEvent(
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pos, we->delta(),
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we->buttons(), we->modifiers(),
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we->orientation() );
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#endif
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m_ignoreWheelEvent = true;
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QApplication::sendEvent( this, &wheelEvent );
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m_ignoreWheelEvent = false;
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return true;
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}
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return QwtWheel::eventFilter( object, event );
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}
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private:
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bool m_ignoreWheelEvent;
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};
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}
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WheelBox::WheelBox( const QString& title,
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double min, double max, double stepSize, QWidget* parent )
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: QWidget( parent )
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{
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m_number = new QLCDNumber();
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m_number->setSegmentStyle( QLCDNumber::Filled );
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m_number->setAutoFillBackground( true );
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m_number->setFixedHeight( m_number->sizeHint().height() * 2 );
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m_number->setFocusPolicy( Qt::WheelFocus );
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QPalette pal( Qt::black );
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pal.setColor( QPalette::WindowText, Qt::green );
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m_number->setPalette( pal );
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m_wheel = new Wheel( this );
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m_wheel->setOrientation( Qt::Vertical );
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m_wheel->setInverted( true );
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m_wheel->setRange( min, max );
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m_wheel->setSingleStep( stepSize );
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m_wheel->setPageStepCount( 5 );
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m_wheel->setFixedHeight( m_number->height() );
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m_number->setFocusProxy( m_wheel );
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QFont font( "Helvetica", 10 );
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font.setBold( true );
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m_label = new QLabel( title );
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m_label->setFont( font );
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QHBoxLayout* hLayout = new QHBoxLayout;
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hLayout->setContentsMargins( 0, 0, 0, 0 );
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hLayout->setSpacing( 2 );
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hLayout->addWidget( m_number, 10 );
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hLayout->addWidget( m_wheel );
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QVBoxLayout* vLayout = new QVBoxLayout( this );
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vLayout->addLayout( hLayout, 10 );
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vLayout->addWidget( m_label, 0, Qt::AlignTop | Qt::AlignHCenter );
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connect( m_wheel, SIGNAL(valueChanged(double)),
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m_number, SLOT(display(double)) );
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connect( m_wheel, SIGNAL(valueChanged(double)),
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this, SIGNAL(valueChanged(double)) );
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}
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void WheelBox::setTheme( const QColor& color )
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{
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m_wheel->setPalette( color );
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}
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QColor WheelBox::theme() const
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{
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return m_wheel->palette().color( QPalette::Window );
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}
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void WheelBox::setValue( double value )
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{
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m_wheel->setValue( value );
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m_number->display( value );
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}
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double WheelBox::value() const
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{
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return m_wheel->value();
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}
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#include "moc_WheelBox.cpp"
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