/***************************************************************************
 *   Copyright (C) 2013 by Eike Hein <hein@kde.org>                        *
 *                                                                         *
 *   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 Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
 ***************************************************************************/

#ifndef DRAGHELPER_H
#define DRAGHELPER_H

#include <QObject>
#include <QIcon>
#include <QUrl>

class QQuickItem;

class DragHelper : public QObject
{
    Q_OBJECT
    Q_PROPERTY(int dragIconSize READ dragIconSize WRITE setDragIconSize NOTIFY dragIconSizeChanged)
    Q_PROPERTY(bool dragging READ isDragging NOTIFY draggingChanged)

    public:
        explicit DragHelper(QObject *parent = nullptr);
        ~DragHelper() override;

        int dragIconSize() const;
        void setDragIconSize(int size);
        bool isDragging() const { return m_dragging; }

        Q_INVOKABLE bool isDrag(int oldX, int oldY, int newX, int newY) const;
        Q_INVOKABLE void startDrag(QQuickItem* item, const QUrl &url = QUrl(), const QIcon &icon = QIcon(),
            const QString &extraMimeType = QString(), const QString &extraMimeData = QString());

    Q_SIGNALS:
        void dragIconSizeChanged() const;
        void dropped() const;
        void draggingChanged() const;

    private:
        int m_dragIconSize;
        bool m_dragging;
        Q_INVOKABLE void doDrag(QQuickItem* item, const QUrl &url = QUrl(), const QIcon &icon = QIcon(),
            const QString &extraMimeType = QString(), const QString &extraMimeData = QString());
        void setDragging(bool dragging);
};

#endif