qwt_plot_seriesitem.cpp

/* -*- 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
 *****************************************************************************/

#include "qwt_plot_seriesitem.h"

class QwtPlotSeriesItem::PrivateData
{
public:
    PrivateData():
        orientation( Qt::Vertical )
    {
    }

    Qt::Orientation orientation;
};

/*!
  Constructor
  \param title Title of the curve
*/
QwtPlotSeriesItem::QwtPlotSeriesItem( const QwtText &title ):
    QwtPlotItem( title )
{
    d_data = new PrivateData();
    setItemInterest( QwtPlotItem::ScaleInterest, true );
}

/*!
  Constructor
  \param title Title of the curve
*/
QwtPlotSeriesItem::QwtPlotSeriesItem( const QString &title ):
    QwtPlotItem( QwtText( title ) )
{
    d_data = new PrivateData();
}

//! Destructor
QwtPlotSeriesItem::~QwtPlotSeriesItem()
{
    delete d_data;
}

/*!
  Set the orientation of the item.

  The orientation() might be used in specific way by a plot item.
  F.e. a QwtPlotCurve uses it to identify how to display the curve
  int QwtPlotCurve::Steps or QwtPlotCurve::Sticks style.

  \sa orientation()
*/
void QwtPlotSeriesItem::setOrientation( Qt::Orientation orientation )
{
    if ( d_data->orientation != orientation )
    {
        d_data->orientation = orientation;

        legendChanged();
        itemChanged();
    }
}

/*!
  \return Orientation of the plot item
  \sa setOrientation()
*/
Qt::Orientation QwtPlotSeriesItem::orientation() const
{
    return d_data->orientation;
}

/*!
  \brief Draw the complete series

  \param painter Painter
  \param xMap Maps x-values into pixel coordinates.
  \param yMap Maps y-values into pixel coordinates.
  \param canvasRect Contents rectangle of the canvas
*/
void QwtPlotSeriesItem::draw( QPainter *painter,
        const QwtScaleMap &xMap, const QwtScaleMap &yMap,
        const QRectF &canvasRect ) const
{
    drawSeries( painter, xMap, yMap, canvasRect, 0, -1 );
}

QRectF QwtPlotSeriesItem::boundingRect() const
{
    return dataRect();
}

void QwtPlotSeriesItem::updateScaleDiv(
    const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv )
{   
    const QRectF rect = QRectF(
        xScaleDiv.lowerBound(), yScaleDiv.lowerBound(),
        xScaleDiv.range(), yScaleDiv.range() );
        
    setRectOfInterest( rect );
}   

void QwtPlotSeriesItem::dataChanged()
{
    itemChanged();
}