PlotDataModel Class Reference

A model which operates on top of BaseQueryModel and is used by a plot a source of data points. More...

#include <grapher.h>

Inheritance diagram for PlotDataModel:

Collaboration diagram for PlotDataModel:

List of all members.

Public Member Functions
	PlotDataModel (QAbstractItemModel *model, int xColumn, int yColumn)
void	initialize ()
size_t	size () const
double	x (size_t i) const
double	y (size_t i) const
QwtData *	copy () const

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Detailed Description

A model which operates on top of BaseQueryModel and is used by a plot a source of data points.

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Constructor & Destructor Documentation

PlotDataModel::PlotDataModel	(	QAbstractItemModel *	model,
		int	xColumn,
		int	yColumn
	)

Referenced by copy().

{
    setModel(model, xColumn, yColumn);
}

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Member Function Documentation

QwtData * PlotDataModel::copy

(

)

const

Reimplemented from QwtData.

{
    qDebug() << "Copy of PlotDataModel requested: why?????";
    return new PlotDataModel(model(), xColumn, yColumn);
}

void PlotDataModel::initialize

(

)

{
    xColumn = 0;
    yColumn = 0;
}

size_t PlotDataModel::size

(

)

const

Reimplemented from QwtData.

{
    return model()->rowCount();
}

double PlotDataModel::x

(

size_t

i

)

const

Reimplemented from QwtData.

{ //600ms voor 50k
    QVariant data =  model()->index(i, xColumn).data(Qt::DisplayRole);
    Q_ASSERT(!data.isNull());
#ifdef DEBUG_WITHOUTDB
    bool ok;
    double x = data.toDouble(&ok);
    Q_ASSERT(ok);
#endif //DEBUG_WITHOUTDB
#ifndef DEBUG_WITHOUTDB
    double x = data.toDateTime().toTime_t();
    //qDebug() << x << data;
#endif //DEBUG_WITHOUTDB
    //qDebug() << "asking for x = " << QString::number(x, 'f', 15) << data.toDateTime().toTime_t() << data << " on position " << i;
    return x;
}

double PlotDataModel::y

(

size_t

i

)

const

Reimplemented from QwtData.

{ //100ms voor 50k
    QVariant data = model()->index(i, yColumn).data(Qt::DisplayRole);
    if (data.isNull()) return std::numeric_limits<double>::quiet_NaN();
    else {
        bool ok;
        double y = data.toDouble(&ok);
        Q_ASSERT(ok);
        //qDebug() << "asking for y = " << y << " on position " << i;
        return y;
    }
}

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The documentation for this class was generated from the following files:

• grapher.h
• grapher.cpp