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