120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
#include "mainwindow.h"
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#include "plot.h"
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#include "transformplot.h"
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#include <qwt_transform.h>
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#include <qsplitter.h>
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#include <qmath.h>
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class TransformPos: public QwtTransform
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{
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public:
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TransformPos( double pos, double range, double factor ):
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d_position( pos ),
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d_range( range ),
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d_factor( factor ),
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d_powRange( qPow( d_range, d_factor ) )
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{
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}
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virtual double transform( double value ) const
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{
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const double v1 = d_position - d_range;
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const double v2 = v1 + 2 * d_range;
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if ( value <= v1 )
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{
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return value;
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}
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if ( value >= v2 )
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{
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return v1 + 2 * d_powRange + value - v2;
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}
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double v;
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if ( value <= d_position )
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{
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v = v1 + qPow( value - v1, d_factor );
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}
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else
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{
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v = v1 + 2 * d_powRange - qPow( v2 - value, d_factor );
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}
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return v;
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}
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virtual double invTransform( double value ) const
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{
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const double v1 = d_position - d_range;
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const double v2 = v1 + 2 * d_powRange;
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if ( value < v1 )
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{
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return value;
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}
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if ( value >= v2 )
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{
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return value + 2 * ( d_range - d_powRange );
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}
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double v;
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if ( value <= v1 + d_powRange )
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{
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v = v1 + qPow( value - v1, 1.0 / d_factor );
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}
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else
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{
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v = d_position + d_range - qPow( v2 - value, 1.0 / d_factor );
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}
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return v;
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}
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virtual QwtTransform *copy() const
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{
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return new TransformPos( d_position, d_range, d_factor );
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}
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private:
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const double d_position;
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const double d_range;
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const double d_factor;
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const double d_powRange;
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};
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MainWindow::MainWindow( QWidget *parent ):
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QMainWindow( parent )
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{
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QSplitter *splitter = new QSplitter( Qt::Vertical );
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d_transformPlot = new TransformPlot( splitter );
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d_transformPlot->insertTransformation( "Square Root",
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QColor( "DarkSlateGray" ), new QwtPowerTransform( 0.5 ) );
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d_transformPlot->insertTransformation( "Linear",
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QColor( "Peru" ), new QwtNullTransform() );
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d_transformPlot->insertTransformation( "Cubic",
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QColor( "OliveDrab" ), new QwtPowerTransform( 3.0 ) );
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d_transformPlot->insertTransformation( "Power 10",
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QColor( "Indigo" ), new QwtPowerTransform( 10.0 ) );
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d_transformPlot->insertTransformation( "Log",
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QColor( "SteelBlue" ), new QwtLogTransform() );
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d_transformPlot->insertTransformation( "At 400",
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QColor( "Crimson" ), new TransformPos( 400.0, 100.0, 1.4 ) );
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const QwtPlotItemList curves =
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d_transformPlot->itemList( QwtPlotItem::Rtti_PlotCurve );
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if ( !curves.isEmpty() )
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d_transformPlot->setLegendChecked( curves[ 2 ] );
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d_plot = new Plot( splitter );
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d_plot->setTransformation( new QwtPowerTransform( 3.0 ) );
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setCentralWidget( splitter );
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connect( d_transformPlot, SIGNAL( selected( QwtTransform * ) ),
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d_plot, SLOT( setTransformation( QwtTransform * ) ) );
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}
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