53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
#include <qpainter.h>
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#include <qwt_dial_needle.h>
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#include <qwt_round_scale_draw.h>
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#include "speedo_meter.h"
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SpeedoMeter::SpeedoMeter( QWidget *parent ):
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QwtDial( parent ),
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d_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 ).light( 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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d_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 d_label;
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}
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void SpeedoMeter::drawScaleContents( QPainter *painter,
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const QPointF ¢er, 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, d_label );
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}
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