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#include "plot.h"
#include "settings.h"
#include <qwt_date.h>
#include <qwt_date_scale_draw.h>
#include <qwt_date_scale_engine.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_magnifier.h>
#include <qwt_plot_grid.h>
#include <qwt_plot_layout.h>
Plot::Plot( QWidget *parent ):
QwtPlot( parent )
{
setAutoFillBackground( true );
setPalette( Qt::darkGray );
setCanvasBackground( Qt::white );
plotLayout()->setAlignCanvasToScales( true );
initAxis( QwtPlot::yLeft, "Local Time", Qt::LocalTime );
initAxis( QwtPlot::yRight,
"Coordinated Universal Time ( UTC )", Qt::UTC );
QwtPlotPanner *panner = new QwtPlotPanner( canvas() );
QwtPlotMagnifier *magnifier = new QwtPlotMagnifier( canvas() );
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
const bool on = axis == QwtPlot::yLeft ||
axis == QwtPlot::yRight;
enableAxis( axis, on );
panner->setAxisEnabled( axis, on );
magnifier->setAxisEnabled( axis, on );
}
QwtPlotGrid *grid = new QwtPlotGrid();
grid->setMajorPen( Qt::black, 0, Qt::SolidLine );
grid->setMinorPen( Qt::gray, 0 , Qt::SolidLine );
grid->enableX( false );
grid->enableXMin( false );
grid->enableY( true );
grid->enableYMin( true );
grid->attach( this );
}
void Plot::initAxis( int axis,
const QString& title, Qt::TimeSpec timeSpec )
{
setAxisTitle( axis, title );
QwtDateScaleDraw *scaleDraw = new QwtDateScaleDraw( timeSpec );
QwtDateScaleEngine *scaleEngine = new QwtDateScaleEngine( timeSpec );
#if 0
if ( timeSpec == Qt::LocalTime )
{
scaleDraw->setTimeSpec( Qt::OffsetFromUTC );
scaleDraw->setUtcOffset( 10 );
scaleEngine->setTimeSpec( Qt::OffsetFromUTC );
scaleEngine->setUtcOffset( 10 );
}
#endif
setAxisScaleDraw( axis, scaleDraw );
setAxisScaleEngine( axis, scaleEngine );
}
void Plot::applySettings( const Settings &settings )
{
applyAxisSettings( QwtPlot::yLeft, settings );
applyAxisSettings( QwtPlot::yRight, settings );
replot();
}
void Plot::applyAxisSettings( int axis, const Settings &settings )
{
QwtDateScaleEngine *scaleEngine =
static_cast<QwtDateScaleEngine *>( axisScaleEngine( axis ) );
scaleEngine->setMaxWeeks( settings.maxWeeks );
setAxisMaxMinor( axis, settings.maxMinorSteps );
setAxisMaxMajor( axis, settings.maxMajorSteps );
setAxisScale( axis, QwtDate::toDouble( settings.startDateTime ),
QwtDate::toDouble( settings.endDateTime ) );
}
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