viewitem.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_VIEWITEM_HPP
#define PULSEVIEW_PV_VIEWS_TRACE_VIEWITEM_HPP

#include <list>

#include <QMouseEvent>
#include <QPen>
#include <QPoint>

#include "viewitempaintparams.hpp"

class QAction;
class QMenu;
class QWidget;

namespace pv {

namespace widgets {
class Popup;
}

namespace views {
namespace trace {

class ViewItemOwner;

class ViewItem : public QObject
{
    Q_OBJECT

public:
    static const QSizeF LabelPadding;
    static const int HighlightRadius;

public:
    ViewItem();

    virtual bool enabled() const = 0;

    virtual bool is_selectable(QPoint pos) const;

    bool selected() const;

    virtual void select(bool select = true);

    virtual bool is_draggable(QPoint pos) const;

    bool dragging() const;

    void drag();

    virtual void drag_release();

    virtual void drag_by(const QPoint &delta) = 0;

    virtual QPoint drag_point(const QRect &rect) const = 0;

    virtual QRectF label_rect(const QRectF &rect) const;

    virtual QRectF hit_box_rect(const ViewItemPaintParams &pp) const;

    virtual void paint_label(QPainter &p, const QRect &rect, bool hover);

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

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

    virtual void paint_fore(QPainter &p, ViewItemPaintParams &pp);

    static QColor select_text_color(QColor background);

public:
    virtual QMenu* create_header_context_menu(QWidget *parent);

    virtual QMenu* create_view_context_menu(QWidget *parent, QPoint &click_pos);

    virtual pv::widgets::Popup* create_popup(QWidget *parent);

    virtual void delete_pressed();

    virtual void hover_point_changed(const QPoint &hp);

    virtual void mouse_left_press_event(const QMouseEvent* event);

protected:
    static QPen highlight_pen();

protected:
    QWidget *context_parent_;
    QPoint drag_point_;

private:
    bool selected_;
};

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

#endif // PULSEVIEW_PV_VIEWS_TRACE_VIEWITEM_HPP