analogsignal.hpp

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/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifndef PULSEVIEW_PV_VIEW_ANALOGSIGNAL_HPP
#define PULSEVIEW_PV_VIEW_ANALOGSIGNAL_HPP

#include "signal.hpp"

#include <memory>

namespace pv {

namespace data {
class Analog;
class AnalogSegment;
}

namespace view {

class AnalogSignal : public Signal
{
private:
    static const int NominalHeight;
    static const QColor SignalColours[4];

    static const float EnvelopeThreshold;

public:
    AnalogSignal(pv::Session &session,
        std::shared_ptr<sigrok::Channel> channel,
        std::shared_ptr<pv::data::Analog> data);

    virtual ~AnalogSignal();

    std::shared_ptr<pv::data::SignalData> data() const;

    std::shared_ptr<pv::data::Analog> analog_data() const;

    std::pair<int, int> v_extents() const;

    int scale_handle_offset() const;

    void scale_handle_dragged(int offset);

    void scale_handle_drag_release();

    void paint_back(QPainter &p, const ViewItemPaintParams &pp);

    void paint_mid(QPainter &p, const ViewItemPaintParams &pp);

private:
    void paint_trace(QPainter &p,
        const std::shared_ptr<pv::data::AnalogSegment> &segment,
        int y, int left, const int64_t start, const int64_t end,
        const double pixels_offset, const double samples_per_pixel);

    void paint_envelope(QPainter &p,
        const std::shared_ptr<pv::data::AnalogSegment> &segment,
        int y, int left, const int64_t start, const int64_t end,
        const double pixels_offset, const double samples_per_pixel);

    float scale() const;

private:
    std::shared_ptr<pv::data::Analog> data_;

    int scale_index_;
    int scale_index_drag_offset_;
};

} // namespace view
} // namespace pv

#endif // PULSEVIEW_PV_VIEW_ANALOGSIGNAL_HPP