static const int SYMBOL_SHOW_AT_WIDTH = 5;

static const int SYMBOL_SIZE_MAX = 7;

Plot::Plot(QWidget* parent) :

    QwtPlot(parent),

    zoomer(this->canvas(), false),

    sZoomer(this, &zoomer)

{

    isAutoScaled = true;

    symbolSize = 0;

    numOfSamples = 1;

    QObject::connect(&zoomer, &Zoomer::unzoomed, this, &Plot::unzoomed);

    zoomer.setZoomBase();

    grid.attach(this);

    legend.attach(this);

    showGrid(false);

    darkBackground(false);

    snapshotOverlay = NULL;

        color = QColor(Qt::black);

    }

    snapshotOverlay = new PlotSnapshotOverlay(this->canvas(), color);

    connect(snapshotOverlay, &PlotSnapshotOverlay::done,

            [this]()

            {

                delete snapshotOverlay;

                snapshotOverlay = NULL;

            });

}

void Plot::onXScaleChanged()

{

    auto sw = axisWidget(QwtPlot::xBottom);

    auto paintDist = sw->scaleDraw()->scaleMap().pDist();

    auto scaleDist = sw->scaleDraw()->scaleMap().sDist();

    auto fullScaleDist = zoomer.zoomBase().width();

    auto zoomRate = fullScaleDist / scaleDist;

    float samplesInView = numOfSamples / zoomRate;

    int symDisPx = round(paintDist / samplesInView);

    if (symDisPx < SYMBOL_SHOW_AT_WIDTH)

    {

        symbolSize = 0;

    }

    else

    {

        symbolSize = std::min(SYMBOL_SIZE_MAX, symDisPx-SYMBOL_SHOW_AT_WIDTH+1);

    }

}

void Plot::updateSymbols()

{

    const QwtPlotItemList curves = itemList( QwtPlotItem::Rtti_PlotCurve );

    if (curves.size() > 0)

    {

        for (int i = 0; i < curves.size(); i++)

        {

            QwtSymbol* symbol = NULL;

            QwtPlotCurve* curve = static_cast<QwtPlotCurve*>(curves[i]);

            }

            curve->setSymbol(symbol);

        }

    }

}

void Plot::resizeEvent(QResizeEvent * event)

{

    QwtPlot::resizeEvent(event);

    onXScaleChanged();

}

{

    numOfSamples = value;

    onXScaleChanged();

}

#include <QList>

#include <QAction>

#include <qwt_plot.h>

#include <qwt_plot_grid.h>

#include <qwt_plot_shapeitem.h>

#include <qwt_plot_legenditem.h>

#include <qwt_plot_textlabel.h>

#include "zoomer.h"

#include "scalezoomer.h"

#include "plotsnapshotoverlay.h"

class Plot : public QwtPlot

{

    Q_OBJECT

    friend class PlotManager;

public:

    Plot(QWidget* parent = 0);

    ~Plot();

    static QColor makeColor(unsigned int channelIndex);

public slots:

    void showGrid(bool show = true);

    void showMinorGrid(bool show = true);

    void showLegend(bool show = true);

    void showDemoIndicator(bool show = true);

    void unzoom();

    void darkBackground(bool enabled = true);

    void setYAxis(bool autoScaled, double yMin = 0, double yMax = 1);

    void setXAxis(double xMin, double xMax);

    /**

     * Displays an animation for snapshot.

     *

     * @param light show a light colored (white) animation or the opposite

     */

    void flashSnapshotOverlay(bool light);

protected:

    /// update the display of symbols depending on `symbolSize`

    void updateSymbols();

private:

    bool isAutoScaled;

    double yMin, yMax;

    double _xMin, _xMax;

    unsigned numOfSamples;

    int symbolSize;

    Zoomer zoomer;

    ScaleZoomer sZoomer;

    QwtPlotGrid grid;

    PlotSnapshotOverlay* snapshotOverlay;

    QwtPlotLegendItem legend;

    QwtPlotTextLabel demoIndicator;

    void resetAxes();

    void resizeEvent(QResizeEvent * event);

private slots:

    void unzoomed();

    void onXScaleChanged();

};

#endif // PLOT_H

  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/>.

*/

#include "qwt_symbol.h"

#include "plot.h"

#include "plotmanager.h"

#include "utils.h"

#include "setting_defines.h"

PlotManager::PlotManager(QWidget* plotArea, ChannelInfoModel* infoModel, QObject *parent) :

    QObject(parent),

    _plotArea(plotArea),

    showGridAction("&Grid", this),

    showMinorGridAction("&Minor Grid", this),

    unzoomAction("&Unzoom", this),

    darkBackgroundAction("&Dark Background", this),

    showLegendAction("&Legend", this),

{

    _autoScaled = true;

    _yMin = 0;

    _yMax = 1;

    isDemoShown = false;

    _infoModel = infoModel;

    _numOfSamples = 1;

    // initalize layout and single widget

    isMulti = false;

    scrollArea = NULL;

    setupLayout(isMulti);

    addPlotWidget();

    // initialize menu actions

    showGridAction.setToolTip("Show Grid");

    showMinorGridAction.setToolTip("Show Minor Grid");

    unzoomAction.setToolTip("Unzoom the Plot");

    darkBackgroundAction.setToolTip("Enable Dark Plot Background");

    showLegendAction.setToolTip("Display the Legend on Plot");

    showMultiAction.setToolTip("Display All Channels Separately");

    showGridAction.setShortcut(QKeySequence("G"));

    showMinorGridAction.setShortcut(QKeySequence("M"));

    showGridAction.setCheckable(true);

    showMinorGridAction.setCheckable(true);

    darkBackgroundAction.setCheckable(true);

    showLegendAction.setCheckable(true);

    showMultiAction.setCheckable(true);

    showGridAction.setChecked(false);

    showMinorGridAction.setChecked(false);

    darkBackgroundAction.setChecked(false);

    showLegendAction.setChecked(true);

    showMultiAction.setChecked(false);

    showMinorGridAction.setEnabled(false);

    connect(&showGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &PlotManager::showGrid);

    connect(&showGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            &showMinorGridAction, &QAction::setEnabled);

    connect(&showMinorGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &PlotManager::showMinorGrid);

    connect(&unzoomAction, &QAction::triggered, this, &PlotManager::unzoom);

    connect(&darkBackgroundAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &PlotManager::darkBackground);

    connect(&showLegendAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &PlotManager::showLegend);

    connect(&showLegendAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

Plot* PlotManager::addPlotWidget()

{

    auto plot = new Plot();

    plotWidgets.append(plot);

    layout->addWidget(plot);

    plot->darkBackground(darkBackgroundAction.isChecked());

    plot->showGrid(showGridAction.isChecked());

    plot->showMinorGrid(showMinorGridAction.isChecked());

    plot->showLegend(showLegendAction.isChecked());

    plot->showDemoIndicator(isDemoShown);

    plot->setYAxis(_autoScaled, _yMin, _yMax);

    if (_xAxisAsIndex)

    {

        plot->setXAxis(0, _numOfSamples);

    }

    else

    {

        plot->setXAxis(_xMin, _xMax);

    }

    return plot;

}

    }

}

QList<QAction*> PlotManager::menuActions()

{

    QList<QAction*> actions;

    actions << &showGridAction;

    actions << &showMinorGridAction;

    actions << &unzoomAction;

    actions << &darkBackgroundAction;

    actions << &showLegendAction;

    actions << &showMultiAction;

    return actions;

}

void PlotManager::showGrid(bool show)

{

    for (auto plot : plotWidgets)

    {

        plot->showGrid(show);

    }

}

void PlotManager::showMinorGrid(bool show)

        plot->unzoom();

    }

}

void PlotManager::darkBackground(bool enabled)

{

    for (auto plot : plotWidgets)

    {

        plot->darkBackground(enabled);

    }

}

void PlotManager::setYAxis(bool autoScaled, double yAxisMin, double yAxisMax)

{

    _autoScaled = autoScaled;

    _yMin = yAxisMin;

    _yMax = yAxisMax;

    for (auto plot : plotWidgets)

    {

        plot->setYAxis(autoScaled, yAxisMin, yAxisMax);

    }

}

void PlotManager::setXAxis(bool asIndex, double xMin, double xMax)

{

    for (auto plot : plotWidgets)

    {

        plot->flashSnapshotOverlay(darkBackgroundAction.isChecked());

    }

}

void PlotManager::onNumOfSamplesChanged(unsigned value)

{

    _numOfSamples = value;

    for (auto plot : plotWidgets)

    {

        if (_xAxisAsIndex) plot->setXAxis(0, value);

    }

}

void PlotManager::saveSettings(QSettings* settings)

{

    settings->beginGroup(SettingGroup_Plot);

    settings->setValue(SG_Plot_DarkBackground, darkBackgroundAction.isChecked());

    settings->setValue(SG_Plot_Grid, showGridAction.isChecked());

    settings->setValue(SG_Plot_MinorGrid, showMinorGridAction.isChecked());

    settings->setValue(SG_Plot_Legend, showLegendAction.isChecked());

    settings->setValue(SG_Plot_MultiPlot, showMultiAction.isChecked());

  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 <qwt_plot_curve.h>

#include "plot.h"

#include "framebufferseries.h"

#include "channelinfomodel.h"

class PlotManager : public QObject

{

    Q_OBJECT

public:

    explicit PlotManager(QWidget* plotArea, ChannelInfoModel* infoModel = NULL, QObject *parent = 0);

    QScrollArea* scrollArea;

    QList<QwtPlotCurve*> curves;

    QList<Plot*> plotWidgets;

    ChannelInfoModel* _infoModel;

    bool isDemoShown;

    bool _autoScaled;

    double _yMin;

    double _yMax;

    bool _xAxisAsIndex;

    double _xMin;

    double _xMax;

    unsigned _numOfSamples;

    // menu actions

    QAction showGridAction;

    QAction showMinorGridAction;

    QAction unzoomAction;

    QAction darkBackgroundAction;

    QAction showLegendAction;

    QAction showMultiAction;

    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);

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 onChannelInfoChanged(const QModelIndex & topLeft,

                              const QModelIndex & bottomRight,

                              const QVector<int> & roles = QVector<int> ());

};