viewport.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, see <http://www.gnu.org/licenses/>.
 */

#ifndef PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP
#define PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP

#include <boost/optional.hpp>

#include <QPoint>
#include <QTimer>
#include <QTouchEvent>

#include <pv/globalsettings.hpp>

#include "pv/util.hpp"
#include "viewwidget.hpp"

using std::shared_ptr;
using std::vector;

class QPainter;
class QPaintEvent;
class Session;

namespace pv {
namespace views {
namespace trace {

class View;

class Viewport : public ViewWidget, public GlobalSettingsInterface
{
    Q_OBJECT

public:
    explicit Viewport(View &parent);
    ~Viewport();

    shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt);

private:
    void item_hover(const shared_ptr<ViewItem> &item, QPoint pos);

    void drag();

    void drag_by(const QPoint &delta);

    void drag_release();

    vector< shared_ptr<ViewItem> > items();

    bool touch_event(QTouchEvent *event);

    void paintEvent(QPaintEvent *event);

    void mouseDoubleClickEvent(QMouseEvent *event);

    void wheelEvent(QWheelEvent *event);

    void on_setting_changed(const QString &key, const QVariant &value);

private:
    boost::optional<pv::util::Timestamp> drag_offset_;
    int drag_v_offset_;
    bool allow_vertical_dragging_;

    double pinch_offset0_;
    double pinch_offset1_;
    bool pinch_zoom_active_;
};

} // namespace trace
} // namespace views
} // namespace pv

#endif // PULSEVIEW_PV_VIEWS_TRACE_VIEWPORT_HPP