/** ===========================================================
 *
 * This file is a part of digiKam project
 * <a href="http://www.digikam.org">http://www.digikam.org</a>
 *
 * @date   2010-03-06
 * @brief  sub class of QTreeWidget for drag-and-drop support
 *
 * @author Copyright (C) 2010 by Michael G. Hansen
 *         <a href="mailto:mike at mghansen dot de">mike at mghansen dot de</a>
 *
 * 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, 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.
 *
 * ============================================================ */

#include "mytreewidget.moc"

// Qt includes

#include <QApplication>
#include <QMouseEvent>

// libkgeomap includes

#include "libkgeomap/kgeomap_primitives.h"

// local includes

#include "dragdrophandler.h"

class MyTreeWidgetPrivate
{
public:

    MyTreeWidgetPrivate()
        : dragStartPos()
    {
    }

    QPoint dragStartPos;
};

MyTreeWidget::MyTreeWidget(QWidget* const parent)
            : QTreeWidget(parent), d(new MyTreeWidgetPrivate())
{
    setDragEnabled(true);
    setDragDropMode(QAbstractItemView::DragOnly);
}

MyTreeWidget::~MyTreeWidget()
{
    delete d;
}

void MyTreeWidget::startDrag(Qt::DropActions /*supportedActions*/)
{
    QMimeData* const dragMimeData = mimeData(selectionModel()->selectedIndexes());
    QDrag* const drag             = new QDrag(this);
    drag->setMimeData(dragMimeData);
    drag->start(Qt::CopyAction);
}

QMimeData* MyTreeWidget::mimeData(const QList<QTreeWidgetItem*> items) const
{
    return QTreeWidget::mimeData(items);
}

QMimeData* MyTreeWidget::mimeData(const QModelIndexList itemsToDrag) const
{
    MyDragData* const mimeData = new MyDragData;

    // TODO: determine the indices of the items to drag!
    for (int i=0; i<itemsToDrag.count(); ++i)
    {
        mimeData->draggedIndices << QPersistentModelIndex(itemsToDrag.at(i));
    }

    return mimeData;
}
