/*
 Copyright © 2017 Hasan Yavuz Özderya

 This file is part of serialplot.

 serialplot is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 serialplot is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with serialplot. If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PLOTMANAGER_H
#define PLOTMANAGER_H

#include <QObject>
#include <QWidget>
#include <QScrollArea>
#include <QVBoxLayout>
#include <QList>
#include <QSettings>
#include <QMenu>

#include <qwt_plot_curve.h>
#include "plot.h"
#include "framebufferseries.h"
#include "channelinfomodel.h"
#include "plotmenu.h"

class PlotManager : public QObject
{
 Q_OBJECT

public:
 explicit PlotManager(QWidget* plotArea, PlotMenu* menu,
 ChannelInfoModel* infoModel = NULL,
 QObject *parent = 0);
 ~PlotManager();
 /// Add a new curve with title and buffer. A color is
 /// automatically chosen for curve.
 void addCurve(QString title, FrameBuffer* buffer);
 /// Alternative of `addCurve` for static curve data (snapshots).
 void addCurve(QString title, QVector<QPointF> data);
 /// Removes curves from the end
 void removeCurves(unsigned number);
 /// Returns current number of curves known by plot manager
 unsigned numOfCurves();

public slots:
 /// Enable/Disable multiple plot display
 void setMulti(bool enabled);
 /// Update all plot widgets
 void replot();
 /// Enable display of a "DEMO" label on each plot
 void showDemoIndicator(bool show = true);
 /// Set the Y axis
 void setYAxis(bool autoScaled, double yMin = 0, double yMax = 1);
 /// Set the X axis
 void setXAxis(bool asIndex, double xMin = 0 , double xMax = 1);
 /// Display an animation for snapshot
 void flashSnapshotOverlay();
 /// Should be called to update zoom base
 void setNumOfSamples(unsigned value);
 /// Maximum width of X axis (limit of hscroll)
 void setPlotWidth(double width);

private:
 bool isMulti;
 QWidget* _plotArea;
 PlotMenu* _menu;
 QVBoxLayout* layout; ///< layout of the `plotArea`
 QScrollArea* scrollArea;
 QList<QwtPlotCurve*> curves;
 QList<Plot*> plotWidgets;
 Plot* emptyPlot; ///< for displaying when all channels are hidden
 ChannelInfoModel* _infoModel;
 bool isDemoShown;
 bool _autoScaled;
 double _yMin;
 double _yMax;
 bool _xAxisAsIndex;
 double _xMin;
 double _xMax;
 unsigned _numOfSamples;
 double _plotWidth;
 Plot::ShowSymbols showSymbols;

 /// Setups the layout for multi or single plot
 void setupLayout(bool multiPlot);
 /// Inserts a new plot widget to the current layout.
 Plot* addPlotWidget();
 /// Returns the plot widget that given curve is attached to
 Plot* plotWidget(unsigned curveIndex);
 /// Common part of overloaded `addCurve` functions
 void _addCurve(QwtPlotCurve* curve);
 /// Check and make sure "no visible channels" text is shown
 void checkNoVisChannels();

private slots:
 void showGrid(bool show = true);
 void showMinorGrid(bool show = true);
 void showLegend(bool show = true);
 void unzoom();
 void darkBackground(bool enabled = true);
 void setSymbols(Plot::ShowSymbols shown);

 void onChannelInfoChanged(const QModelIndex & topLeft,
 const QModelIndex & bottomRight,
 const QVector<int> & roles = QVector<int> ());
};

#endif // PLOTMANAGER_H