98 lines
2.7 KiB
C++
98 lines
2.7 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 "Plot.h"
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#include "Settings.h"
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#include <QwtDate>
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#include <QwtDateScaleDraw>
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#include <QwtDateScaleEngine>
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#include <QwtPlotPanner>
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#include <QwtPlotMagnifier>
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#include <QwtPlotGrid>
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#include <QwtPlotLayout>
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Plot::Plot( QWidget* parent )
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: QwtPlot( parent )
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{
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setAutoFillBackground( true );
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setPalette( Qt::darkGray );
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setCanvasBackground( Qt::white );
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plotLayout()->setAlignCanvasToScales( true );
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initAxis( QwtAxis::YLeft, "Local Time", QTimeZone::LocalTime );
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initAxis( QwtAxis::YRight,
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"Coordinated Universal Time ( UTC )", QTimeZone::UTC );
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QwtPlotPanner* panner = new QwtPlotPanner( canvas() );
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QwtPlotMagnifier* magnifier = new QwtPlotMagnifier( canvas() );
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for ( int axis = 0; axis < QwtAxis::AxisPositions; axis++ )
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{
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const bool on = QwtAxis::isYAxis( axis );
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setAxisVisible( axis, on );
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panner->setAxisEnabled( axis, on );
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magnifier->setAxisEnabled( axis, on );
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}
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QwtPlotGrid* grid = new QwtPlotGrid();
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grid->setMajorPen( Qt::black, 0, Qt::SolidLine );
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grid->setMinorPen( Qt::gray, 0, Qt::SolidLine );
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grid->enableX( false );
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grid->enableXMin( false );
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grid->enableY( true );
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grid->enableYMin( true );
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grid->attach( this );
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}
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void Plot::initAxis( int axis,
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const QString& title, QTimeZone timeZone )
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{
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setAxisTitle( axis, title );
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QwtDateScaleDraw* scaleDraw = new QwtDateScaleDraw( timeZone );
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QwtDateScaleEngine* scaleEngine = new QwtDateScaleEngine( timeZone );
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#if 0
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if ( timeSpec == Qt::LocalTime )
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{
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scaleDraw->setTimeSpec( Qt::OffsetFromUTC );
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scaleDraw->setUtcOffset( 10 );
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scaleEngine->setTimeSpec( Qt::OffsetFromUTC );
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scaleEngine->setUtcOffset( 10 );
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}
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#endif
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setAxisScaleDraw( axis, scaleDraw );
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setAxisScaleEngine( axis, scaleEngine );
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}
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void Plot::applySettings( const Settings& settings )
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{
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applyAxisSettings( QwtAxis::YLeft, settings );
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applyAxisSettings( QwtAxis::YRight, settings );
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replot();
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}
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void Plot::applyAxisSettings( int axis, const Settings& settings )
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{
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QwtDateScaleEngine* scaleEngine =
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static_cast< QwtDateScaleEngine* >( axisScaleEngine( axis ) );
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scaleEngine->setMaxWeeks( settings.maxWeeks );
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setAxisMaxMinor( axis, settings.maxMinorSteps );
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setAxisMaxMajor( axis, settings.maxMajorSteps );
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setAxisScale( axis, QwtDate::toDouble( settings.startDateTime ),
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QwtDate::toDouble( settings.endDateTime ) );
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}
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#include "moc_Plot.cpp"
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