60 lines
1.7 KiB
C++
60 lines
1.7 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 "SpeedoMeter.h"
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#include <QwtDialNeedle>
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#include <QwtRoundScaleDraw>
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#include <QPainter>
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SpeedoMeter::SpeedoMeter( QWidget* parent )
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: QwtDial( parent )
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, m_label( "km/h" )
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{
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QwtRoundScaleDraw* scaleDraw = new QwtRoundScaleDraw();
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scaleDraw->setSpacing( 8 );
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scaleDraw->enableComponent( QwtAbstractScaleDraw::Backbone, false );
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scaleDraw->setTickLength( QwtScaleDiv::MinorTick, 0 );
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scaleDraw->setTickLength( QwtScaleDiv::MediumTick, 4 );
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scaleDraw->setTickLength( QwtScaleDiv::MajorTick, 8 );
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setScaleDraw( scaleDraw );
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setWrapping( false );
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setReadOnly( true );
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setOrigin( 135.0 );
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setScaleArc( 0.0, 270.0 );
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QwtDialSimpleNeedle* needle = new QwtDialSimpleNeedle(
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QwtDialSimpleNeedle::Arrow, true, Qt::red,
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QColor( Qt::gray ).lighter( 130 ) );
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setNeedle( needle );
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}
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void SpeedoMeter::setLabel( const QString& label )
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{
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m_label = label;
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update();
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}
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QString SpeedoMeter::label() const
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{
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return m_label;
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}
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void SpeedoMeter::drawScaleContents( QPainter* painter,
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const QPointF& center, double radius ) const
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{
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QRectF rect( 0.0, 0.0, 2.0 * radius, 2.0 * radius - 10.0 );
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rect.moveCenter( center );
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const QColor color = palette().color( QPalette::Text );
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painter->setPen( color );
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const int flags = Qt::AlignBottom | Qt::AlignHCenter;
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painter->drawText( rect, flags, m_label );
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}
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