HistogramItem.hh 5.13 KB
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/*===========================================================================*\
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*                                                                            *
*                              OpenFlipper                                   *
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
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*                                                                            *
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\*===========================================================================*/

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#ifndef HISTOGRAM_ITEM_H
#define HISTOGRAM_ITEM_H

#include <qglobal.h>
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#include <QColor>
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#include "qwt_plot_item.h" 

class QwtIntervalData;
class QString;

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/** \brief Histogram plotting widget
 *
 * This widget can be used to render a plot. It provides a Qt widget with
 * histogram bars. The data is supplied as QwtIntervalData via HistogramItem::setData().
 * Additionally you can set colors for each bar, which are provided via
 * HistogramItem::setColors()
 *
 *
 * !!!!!!!!!!! This class is deprecated !!!!!!!!!!!
 * !!!!!!!!! Use the one from ACG/QtWidgets which is for qwt6 !!!!!!!!!!!!!!!!!!
 */
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class HistogramItem: public QwtPlotItem
{
public:
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    /// Constructor
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    explicit HistogramItem(const QString &title = QString::null);
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    /// Constructor
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    explicit HistogramItem(const QwtText &title);
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    /// Destructor
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    virtual ~HistogramItem();

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    /** \brief set data to render
     *
     * @param data data provided as QwtIntervalData
     */
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    void setData(const QwtIntervalData &data);
    const QwtIntervalData &data() const;

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    /** \brief Set colors
     *
     * @param _colors A vector of colors. One for each interval in the same order.
     */
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    void setColors( std::vector< QColor >& _colors);

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    /// Function hat will return the datas bounding rectangle (for rendering)
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    virtual QwtDoubleRect boundingRect() const;

    virtual int rtti() const;

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    /// The actual draw function, drawing the bars inside the plot widget.
    virtual void draw(QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &) const;
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    void setBaseline(double reference);
    double baseline() const;

    enum HistogramAttribute
    {
        Auto = 0,
        Xfy = 1
    };

    void setHistogramAttribute(HistogramAttribute, bool on = true);
    bool testHistogramAttribute(HistogramAttribute) const;

protected:
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    /// Draws a single bar
    virtual void drawBar(QPainter *, Qt::Orientation o, const QRect &) const;
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private:
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    inline QColor color(uint i) const;
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    void init();

    class PrivateData;
    PrivateData *d_data;
};

#endif