plasma-framework/appletbrowser/customdragtreeview.cpp

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/*
* Copyright (C) 2007 Ivan Cukic <ivan.cukic+kde@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library/Lesser General Public License
* version 2, or (at your option) any later version, as published by the
* Free Software Foundation
*
* 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 Library/Lesser 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.
*/
#include "kcategorizeditemsview_p.h"
#define PIX_SIZE 64
#define MAX_OFFSET 16
#define MAX_COUNT 5
CustomDragTreeView::CustomDragTreeView(QWidget * parent)
: QTreeView(parent) {}
void CustomDragTreeView::startDrag ( Qt::DropActions supportedActions )
{
Q_UNUSED(supportedActions);
// TODO: calculate real size for pixmap - using the icon sizes, not fixed
// like now
if (!m_view) return;
QModelIndexList indexes = selectedIndexes();
if (indexes.count() > 0) {
QMimeData *data = model()->mimeData(indexes);
if (!data) {
return;
}
int size = PIX_SIZE + (qMin(MAX_COUNT, indexes.count()) * MAX_OFFSET);
int off = MAX_OFFSET;
if (indexes.count() > MAX_COUNT) {
off = (MAX_OFFSET * MAX_COUNT) / indexes.count();
}
kDebug() << "Size: " << size << " Off: " << off << "\n";
QPixmap pixmap(size, size);
pixmap.fill(QColor(255, 255, 255, 0)); // TODO: Transparent. Now it flickers when it's transparent
QPainter painter(&pixmap);
QRect rect(0, 0, PIX_SIZE, PIX_SIZE);
foreach (QModelIndex index, indexes) {
if (index.column() == 1) continue;
KCategorizedItemsViewModels::AbstractItem * item =
m_view->getItemByProxyIndex(index);
if (item) {
rect.setSize(item->icon().actualSize(QSize(PIX_SIZE, PIX_SIZE)));
//painter.fillRect(rect, QBrush(QColor(255, 255, 255))); // TODO: Use global palettes
item->icon().paint(&painter, rect);
rect.moveTopLeft(rect.topLeft() + QPoint(off, off));
}
}
painter.end();
QDrag *drag = new QDrag(this);
drag->setPixmap(pixmap);
drag->setMimeData(data);
drag->start(supportedActions);
//drag->setHotSpot(d->pressedPosition - rect.topLeft());
//if (drag->start(supportedActions) == Qt::MoveAction)
// d->clearOrRemove();
}
}