OSCAR-code/sleepyhead/Graphs/gLineChart.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 *
 * gLineChart Header
 *
 * Copyright (c) 2011-2014 Mark Watkins <jedimark@users.sourceforge.net>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file COPYING in the main directory of the Linux
 * distribution for more details. */

#ifndef GLINECHART_H
#define GLINECHART_H

#include <QPainter>
#include <QVector>

#include "Graphs/layer.h"
#include "SleepLib/event.h"
#include "SleepLib/day.h"

/*! \class gLineChart
    \brief Draws a 2D linechart from all Session data in a day. EVL_Waveforms typed EventLists are accelerated.
    */
class gLineChart: public Layer
{
  public:
    /*! \brief Creates a new 2D gLineChart Layer
        \param code  The Channel that gets drawn by this layer
        \param col  Color of the Plot
        \param square_plot Whether or not to use square plots (only effective for EVL_Event typed EventList data)
        \param disable_accel Whether or not to disable acceleration for EVL_Waveform typed EventList data
        */
    gLineChart(ChannelID code, const QColor col = QColor("black"), bool square_plot = false,
               bool disable_accel = false);
    virtual ~gLineChart();

    //! \brief The drawing code that fills the vertex buffers
    virtual void paint(QPainter &painter, gGraph &w, const QRegion &region);

    //! \brief Set Use Square plots for non EVL_Waveform data
    void SetSquarePlot(bool b) { m_square_plot = b; }

    //! \brief Returns true if using Square plots for non EVL_Waveform data
    bool GetSquarePlot() { return m_square_plot; }

    //! \brief Set this if you want this layer to draw it's empty data message
    //! They don't show anymore due to the changes in gGraphView. Should modify isEmpty if this still gets to live
    void ReportEmpty(bool b) { m_report_empty = b; }

    //! \brief Returns whether or not to show the empty text message
    bool GetReportEmpty() { return m_report_empty; }

    //! \brief Sets the ability to Disable waveform plot acceleration (which hides unseen data)
    void setDisableAccel(bool b) { m_disable_accel = b; }

    //! \brief Returns true if waveform plot acceleration is disabled
    bool disableAccel() { return m_disable_accel; }

    //! \brief Sets the Day object containing the Sessions this linechart draws from
    virtual void SetDay(Day *d);

    //! \brief Returns Minimum Y-axis value for this layer
    virtual EventDataType Miny();

    //! \brief Returns Maximum Y-axis value for this layer
    virtual EventDataType Maxy();

    //! \brief Returns true if all subplots contain no data
    virtual bool isEmpty();

    //! \brief Add Subplot 'code'. Note the first one is added in the constructor.
    void addPlot(ChannelID code, QColor color, bool square) { m_codes.push_back(code); m_colors.push_back(color); m_enabled[code] = true; m_square.push_back(square); }

    //! \brief Returns true of the subplot 'code' is enabled.
    bool plotEnabled(ChannelID code) { if ((m_enabled.contains(code)) && m_enabled[code]) { return true; } else { return false; } }

    //! \brief Enable or Disable the subplot identified by code.
    void setPlotEnabled(ChannelID code, bool b) { m_enabled[code] = b; }

  protected:
    //! \brief Mouse moved over this layers area (shows the hover-over tooltips here)
    virtual bool mouseMoveEvent(QMouseEvent *event, gGraph *graph);

    QString getMetaString(ChannelID code, qint64 time);

    bool m_report_empty;
    bool m_square_plot;
    bool m_disable_accel;
    QColor m_line_color;

    //! \brief Used by accelerated waveform plots. Must be >= Screen Resolution (or at least graph width)
    static const int max_drawlist_size = 10000;

    //! \brief The list of screen points used for accelerated waveform plots..
    QPoint m_drawlist[max_drawlist_size];

    int subtract_offset;

    QVector<ChannelID> m_codes;
    QVector<QColor> m_colors;
    QVector<bool> m_square;
    QHash<ChannelID, bool> m_enabled;

    QVector<QLine> lines;
};

#endif // GLINECHART_H