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#include "plot.h"
#include "friedberg2007.h"
#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_marker.h>
#include <qwt_plot_grid.h>
#include <qwt_plot_curve.h>
#include <qwt_plot_canvas.h>
#include <qwt_plot_intervalcurve.h>
#include <qwt_legend.h>
#include <qwt_interval_symbol.h>
#include <qwt_symbol.h>
#include <qwt_series_data.h>
#include <qwt_text.h>
#include <qwt_scale_draw.h>
#include <qwt_plot_renderer.h>
#include <qdatetime.h>
class Grid: public QwtPlotGrid
{
public:
Grid()
{
enableXMin( true );
setMajorPen( Qt::white, 0, Qt::DotLine );
setMinorPen( Qt::gray, 0, Qt::DotLine );
}
virtual void updateScaleDiv( const QwtScaleDiv &xScaleDiv,
const QwtScaleDiv &yScaleDiv )
{
QwtScaleDiv scaleDiv( xScaleDiv.lowerBound(),
xScaleDiv.upperBound() );
scaleDiv.setTicks( QwtScaleDiv::MinorTick,
xScaleDiv.ticks( QwtScaleDiv::MinorTick ) );
scaleDiv.setTicks( QwtScaleDiv::MajorTick,
xScaleDiv.ticks( QwtScaleDiv::MediumTick ) );
QwtPlotGrid::updateScaleDiv( scaleDiv, yScaleDiv );
}
};
class YearScaleDraw: public QwtScaleDraw
{
public:
YearScaleDraw()
{
setTickLength( QwtScaleDiv::MajorTick, 0 );
setTickLength( QwtScaleDiv::MinorTick, 0 );
setTickLength( QwtScaleDiv::MediumTick, 6 );
setLabelRotation( -60.0 );
setLabelAlignment( Qt::AlignLeft | Qt::AlignVCenter );
setSpacing( 15 );
}
virtual QwtText label( double value ) const
{
return QDate::longMonthName( int( value / 30 ) + 1 );
}
};
Plot::Plot( QWidget *parent ):
QwtPlot( parent )
{
setObjectName( "FriedbergPlot" );
setTitle( "Temperature of Friedberg/Germany" );
setAxisTitle( QwtPlot::xBottom, "2007" );
setAxisScaleDiv( QwtPlot::xBottom, yearScaleDiv() );
setAxisScaleDraw( QwtPlot::xBottom, new YearScaleDraw() );
setAxisTitle( QwtPlot::yLeft,
QString( "Temperature [%1C]" ).arg( QChar( 0x00B0 ) ) );
QwtPlotCanvas *canvas = new QwtPlotCanvas();
canvas->setPalette( Qt::darkGray );
canvas->setBorderRadius( 10 );
setCanvas( canvas );
// grid
QwtPlotGrid *grid = new Grid;
grid->attach( this );
insertLegend( new QwtLegend(), QwtPlot::RightLegend );
const int numDays = 365;
QVector<QPointF> averageData( numDays );
QVector<QwtIntervalSample> rangeData( numDays );
for ( int i = 0; i < numDays; i++ )
{
const Temperature &t = friedberg2007[i];
averageData[i] = QPointF( double( i ), t.averageValue );
rangeData[i] = QwtIntervalSample( double( i ),
QwtInterval( t.minValue, t.maxValue ) );
}
insertCurve( "Average", averageData, Qt::black );
insertErrorBars( "Range", rangeData, Qt::blue );
// LeftButton for the zooming
// MidButton for the panning
// RightButton: zoom out by 1
// Ctrl+RighButton: zoom out to full size
QwtPlotZoomer* zoomer = new QwtPlotZoomer( canvas );
zoomer->setRubberBandPen( QColor( Qt::black ) );
zoomer->setTrackerPen( QColor( Qt::black ) );
zoomer->setMousePattern( QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier );
zoomer->setMousePattern( QwtEventPattern::MouseSelect3,
Qt::RightButton );
QwtPlotPanner *panner = new QwtPlotPanner( canvas );
panner->setMouseButton( Qt::MidButton );
}
QwtScaleDiv Plot::yearScaleDiv() const
{
const int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
QList<double> mediumTicks;
mediumTicks += 0.0;
for ( uint i = 0; i < sizeof( days ) / sizeof( days[0] ); i++ )
mediumTicks += mediumTicks.last() + days[i];
QList<double> minorTicks;
for ( int i = 1; i <= 365; i += 7 )
minorTicks += i;
QList<double> majorTicks;
for ( int i = 0; i < 12; i++ )
majorTicks += i * 30 + 15;
QwtScaleDiv scaleDiv( mediumTicks.first(), mediumTicks.last() + 1,
minorTicks, mediumTicks, majorTicks );
return scaleDiv;
}
void Plot::insertCurve( const QString& title,
const QVector<QPointF>& samples, const QColor &color )
{
d_curve = new QwtPlotCurve( title );
d_curve->setRenderHint( QwtPlotItem::RenderAntialiased );
d_curve->setStyle( QwtPlotCurve::NoCurve );
d_curve->setLegendAttribute( QwtPlotCurve::LegendShowSymbol );
QwtSymbol *symbol = new QwtSymbol( QwtSymbol::XCross );
symbol->setSize( 4 );
symbol->setPen( color );
d_curve->setSymbol( symbol );
d_curve->setSamples( samples );
d_curve->attach( this );
}
void Plot::insertErrorBars(
const QString &title,
const QVector<QwtIntervalSample>& samples,
const QColor &color )
{
d_intervalCurve = new QwtPlotIntervalCurve( title );
d_intervalCurve->setRenderHint( QwtPlotItem::RenderAntialiased );
d_intervalCurve->setPen( Qt::white );
QColor bg( color );
bg.setAlpha( 150 );
d_intervalCurve->setBrush( QBrush( bg ) );
d_intervalCurve->setStyle( QwtPlotIntervalCurve::Tube );
d_intervalCurve->setSamples( samples );
d_intervalCurve->attach( this );
}
void Plot::setMode( int style )
{
if ( style == Tube )
{
d_intervalCurve->setStyle( QwtPlotIntervalCurve::Tube );
d_intervalCurve->setSymbol( NULL );
d_intervalCurve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
}
else
{
d_intervalCurve->setStyle( QwtPlotIntervalCurve::NoCurve );
QColor c( d_intervalCurve->brush().color().rgb() ); // skip alpha
QwtIntervalSymbol *errorBar =
new QwtIntervalSymbol( QwtIntervalSymbol::Bar );
errorBar->setWidth( 8 ); // should be something even
errorBar->setPen( c );
d_intervalCurve->setSymbol( errorBar );
d_intervalCurve->setRenderHint( QwtPlotItem::RenderAntialiased, false );
}
replot();
}
void Plot::exportPlot()
{
QwtPlotRenderer renderer;
renderer.exportTo( this, "friedberg.pdf" );
}
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