qwt_plot_seriesitem.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_PLOT_SERIES_ITEM_H
#define QWT_PLOT_SERIES_ITEM_H

#include "qwt_global.h"
#include "qwt_plot_item.h"
#include "qwt_scale_div.h"
#include "qwt_series_data.h"

class QWT_EXPORT QwtPlotAbstractSeriesItem: public QwtPlotItem
{
public:
    explicit QwtPlotAbstractSeriesItem( const QString &title = QString::null );
    explicit QwtPlotAbstractSeriesItem( const QwtText &title );

    virtual ~QwtPlotAbstractSeriesItem();

    void setOrientation( Qt::Orientation );
    Qt::Orientation orientation() const;

    virtual void draw( QPainter *p,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF & ) const;

    virtual void drawSeries( QPainter *painter,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect, int from, int to ) const = 0;

private:
    class PrivateData;
    PrivateData *d_data;
};

template <typename T>
class QwtPlotSeriesItem: public QwtPlotAbstractSeriesItem
{
public:
    explicit QwtPlotSeriesItem<T>( const QString &title = QString::null );
    explicit QwtPlotSeriesItem<T>( const QwtText &title );

    virtual ~QwtPlotSeriesItem<T>();

    void setData( QwtSeriesData<T> * );

    QwtSeriesData<T> *data();
    const QwtSeriesData<T> *data() const;

    size_t dataSize() const;
    T sample( int index ) const;

    virtual QRectF boundingRect() const;
    virtual void updateScaleDiv( const QwtScaleDiv &,
                                 const QwtScaleDiv & );

protected:
    QwtSeriesData<T> *d_series;
};

template <typename T>
QwtPlotSeriesItem<T>::QwtPlotSeriesItem( const QString &title ):
    QwtPlotAbstractSeriesItem( QwtText( title ) ),
    d_series( NULL )
{
}

template <typename T>
QwtPlotSeriesItem<T>::QwtPlotSeriesItem( const QwtText &title ):
    QwtPlotAbstractSeriesItem( title ),
    d_series( NULL )
{
}

template <typename T>
QwtPlotSeriesItem<T>::~QwtPlotSeriesItem()
{
    delete d_series;
}

template <typename T>
inline QwtSeriesData<T> *QwtPlotSeriesItem<T>::data()
{
    return d_series;
}

template <typename T>
inline const QwtSeriesData<T> *QwtPlotSeriesItem<T>::data() const
{
    return d_series;
}

template <typename T>
inline T QwtPlotSeriesItem<T>::sample( int index ) const
{
    return d_series ? d_series->sample( index ) : T();
}

template <typename T>
void QwtPlotSeriesItem<T>::setData( QwtSeriesData<T> *data )
{
    if ( d_series != data )
    {
        delete d_series;
        d_series = data;
        itemChanged();
    }
}

template <typename T>
size_t QwtPlotSeriesItem<T>::dataSize() const
{
    if ( d_series == NULL )
        return 0;

    return d_series->size();
}

template <typename T>
QRectF QwtPlotSeriesItem<T>::boundingRect() const
{
    if ( d_series == NULL )
        return QRectF( 1.0, 1.0, -2.0, -2.0 ); // invalid

    return d_series->boundingRect();
}

template <typename T>
void QwtPlotSeriesItem<T>::updateScaleDiv( 
    const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv )
{
    if ( d_series )
    {
        const QRectF rect = QRectF(
            xScaleDiv.lowerBound(), yScaleDiv.lowerBound(),
            xScaleDiv.range(), yScaleDiv.range() );

        d_series->setRectOfInterest( rect );
    }
}

#endif