viewwidget.hpp

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/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2013 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_VIEWWIDGET_HPP
#define PULSEVIEW_PV_VIEWS_TRACE_VIEWWIDGET_HPP

#include <memory>

#include <QPoint>
#include <QWidget>

#include <pv/util.hpp>

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

class QTouchEvent;

namespace pv {
namespace views {
namespace trace {

class View;
class ViewItem;

class ViewWidget : public QWidget
{
    Q_OBJECT

protected:
    ViewWidget(View &parent);

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

    virtual void item_clicked(const shared_ptr<ViewItem> &item);

    bool accept_drag() const;

    bool mouse_down() const;

    void drag_items(const QPoint &delta);

    virtual void drag();

    virtual void drag_by(const QPoint &delta);

    virtual void drag_release();

    virtual vector< shared_ptr<ViewItem> > items() = 0;

    virtual shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt) = 0;

    void mouse_left_press_event(QMouseEvent *event);

    void mouse_left_release_event(QMouseEvent *event);

    virtual bool touch_event(QTouchEvent *event);

protected:
    bool event(QEvent *event);

    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);

    void keyPressEvent(QKeyEvent *event);
    void keyReleaseEvent(QKeyEvent *event);

    void leaveEvent(QEvent *event);

public Q_SLOTS:
    void clear_selection();

Q_SIGNALS:
    void selection_changed();

protected:
    pv::views::trace::View &view_;
    QPoint mouse_point_;
    QPoint mouse_down_point_;
    pv::util::Timestamp mouse_down_offset_;
    shared_ptr<ViewItem> mouse_down_item_;

    Qt::KeyboardModifiers mouse_modifiers_;

    bool item_dragging_;
};

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

#endif // PULSEVIEW_PV_VIEWS_TRACE_VIEWWIDGET_HPP