int Plot::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
_id = QwtPlot::qt_metacall(_c, _id, _a);
if (_id < 0)
return _id;
if (_c == QMetaObject::InvokeMetaMethod) {
switch (_id) {
case 0: setDamp((*reinterpret_cast< double(*)>(_a[1]))); break;
default: ;
}
_id -= 1;
}
return _id;
}
Plot::Plot( QWidget *parent ):
QwtPlot( parent )
{
setAutoReplot( false );
setTitle( "Frequency Response of a Second-Order System" );
QwtPlotCanvas *canvas = new QwtPlotCanvas();
canvas->setBorderRadius( 10 );
setCanvas( canvas );
setCanvasBackground( QColor( "MidnightBlue" ) );
// legend
QwtLegend *legend = new QwtLegend;
insertLegend( legend, QwtPlot::BottomLegend );
// grid
QwtPlotGrid *grid = new QwtPlotGrid;
grid->enableXMin( true );
grid->setMajorPen( Qt::white, 0, Qt::DotLine );
grid->setMinorPen( Qt::gray, 0 , Qt::DotLine );
grid->attach( this );
// axes
enableAxis( QwtPlot::yRight );
setAxisTitle( QwtPlot::xBottom, "Normalized Frequency" );
setAxisTitle( QwtPlot::yLeft, "Amplitude [dB]" );
setAxisTitle( QwtPlot::yRight, "Phase [deg]" );
setAxisMaxMajor( QwtPlot::xBottom, 6 );
setAxisMaxMinor( QwtPlot::xBottom, 9 );
setAxisScaleEngine( QwtPlot::xBottom, new QwtLogScaleEngine );
// curves
d_curve1 = new QwtPlotCurve( "Amplitude" );
d_curve1->setRenderHint( QwtPlotItem::RenderAntialiased );
d_curve1->setPen( Qt::yellow );
d_curve1->setLegendAttribute( QwtPlotCurve::LegendShowLine );
d_curve1->setYAxis( QwtPlot::yLeft );
d_curve1->attach( this );
d_curve2 = new QwtPlotCurve( "Phase" );
d_curve2->setRenderHint( QwtPlotItem::RenderAntialiased );
d_curve2->setPen( Qt::cyan );
d_curve2->setLegendAttribute( QwtPlotCurve::LegendShowLine );
d_curve2->setYAxis( QwtPlot::yRight );
d_curve2->attach( this );
// marker
d_marker1 = new QwtPlotMarker();
d_marker1->setValue( 0.0, 0.0 );
d_marker1->setLineStyle( QwtPlotMarker::VLine );
d_marker1->setLabelAlignment( Qt::AlignRight | Qt::AlignBottom );
d_marker1->setLinePen( Qt::green, 0, Qt::DashDotLine );
d_marker1->attach( this );
d_marker2 = new QwtPlotMarker();
d_marker2->setLineStyle( QwtPlotMarker::HLine );
d_marker2->setLabelAlignment( Qt::AlignRight | Qt::AlignBottom );
d_marker2->setLinePen( QColor( 200, 150, 0 ), 0, Qt::DashDotLine );
d_marker2->setSymbol( new QwtSymbol( QwtSymbol::Diamond,
QColor( Qt::yellow ), QColor( Qt::green ), QSize( 8, 8 ) ) );
d_marker2->attach( this );
setDamp( 0.0 );
setAutoReplot( true );
}
