SmoothFilter::SmoothFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle,
                             double start, double end, int m)
: Filter(parent, g)
{
	setDataFromCurve(curveTitle, start, end);
    init(m);
}

FFTFilter::FFTFilter(ApplicationWindow *parent, Graph *g, const QString& curveTitle, int m)
  : Filter(parent, g)
{
  d_sort_data=true;
  setDataFromCurve(curveTitle);
  init(m);
}

ExponentialFit::ExponentialFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, bool expGrowth)
: Fit(parent, g),
  is_exp_growth(expGrowth)
{
	init();
	setDataFromCurve(curveTitle);
}

Differentiation::Differentiation(ApplicationWindow *parent, Graph *g,
                                 const QString &curveTitle, double start,
                                 double end)
    : Filter(parent, g) {
  init();
  setDataFromCurve(curveTitle, start, end);
}

Interpolation::Interpolation(ApplicationWindow *parent, Graph *g, const QString& curveTitle,
                             double start, double end, int m)
: Filter(parent, g)
{
	init(m);
	setDataFromCurve(curveTitle, start, end);
}

void Filter::setInterval(double from, double to)
{
	if (!d_curve){
		QMessageBox::critical((ApplicationWindow *)parent(), tr("QtiPlot") + " - " + tr("Error"),
				tr("Please assign a curve first!"));
		return;
	}
	setDataFromCurve (d_curve->title().text(), from, to);
}

LogisticFit::LogisticFit(ApplicationWindow *parent, Graph *g, const QString& curveTitle, double start, double end)
: Fit(parent, g)
{
	init();
	setDataFromCurve(curveTitle, start, end);
}

Integration::Integration(ApplicationWindow *parent, QwtPlotCurve *c, double start, double end)
: Filter(parent, c)
{
	init();
	setDataFromCurve(c, start, end);
}

LinearFit::LinearFit(ApplicationWindow *parent, QwtPlotCurve *c)
: Fit(parent, c)
{
	init();
	setDataFromCurve(c);
}

PolynomialFit::PolynomialFit(ApplicationWindow *parent, Graph *g, QString& curveTitle, double start, double end, int order, bool legend)
: Fit(parent, g), d_order(order), show_legend(legend)
{
	init();
	setDataFromCurve(curveTitle, start, end);
}

GaussFit::GaussFit(ApplicationWindow *parent, QwtPlotCurve *c, double start, double end)
: MultiPeakFit(parent, c, MultiPeakFit::Gauss, 1)
{
	init();
	setDataFromCurve(c, start, end);
}