libplasma

customdragtreeview.cpp

00001 /*
00002  *   Copyright (C) 2007 Ivan Cukic <ivan.cukic+kde@gmail.com>
00003  *
00004  *   This program is free software; you can redistribute it and/or modify
00005  *   it under the terms of the GNU Library/Lesser General Public License
00006  *   version 2, or (at your option) any later version, as published by the
00007  *   Free Software Foundation
00008  *
00009  *   This program is distributed in the hope that it will be useful,
00010  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *   GNU General Public License for more details
00013  *
00014  *   You should have received a copy of the GNU Library/Lesser General Public
00015  *   License along with this program; if not, write to the
00016  *   Free Software Foundation, Inc.,
00017  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00018  */
00019 
00020 #include "kcategorizeditemsview_p.h"
00021 
00022 #define PIX_SIZE 64
00023 #define MAX_OFFSET 16
00024 #define MAX_COUNT 5
00025 
00026 CustomDragTreeView::CustomDragTreeView(QWidget * parent)
00027     : QTreeView(parent) {}
00028 
00029 void CustomDragTreeView::startDrag ( Qt::DropActions supportedActions )
00030 {
00031     Q_UNUSED(supportedActions);
00032 
00033     // TODO: calculate real size for pixmap - using the icon sizes, not fixed
00034     //       like now
00035 
00036     if (!m_view) return;
00037 
00038     QModelIndexList indexes = selectedIndexes();
00039     if (indexes.count() > 0) {
00040         QMimeData *data = model()->mimeData(indexes);
00041         if (!data) {
00042             return;
00043         }
00044 
00045         int size = PIX_SIZE + (qMin(MAX_COUNT, indexes.count()) * MAX_OFFSET);
00046         int off  = MAX_OFFSET;
00047         if (indexes.count() > MAX_COUNT) {
00048             off = (MAX_OFFSET * MAX_COUNT) / indexes.count();
00049         }
00050 
00051         kDebug() << "Size: " << size << " Off: " << off << "\n";
00052 
00053         QPixmap pixmap(size, size);
00054         pixmap.fill(QColor(255, 255, 255, 0)); // TODO: Transparent. Now it flickers when it's transparent
00055         QPainter painter(&pixmap);
00056         QRect rect(0, 0, PIX_SIZE, PIX_SIZE);
00057 
00058         foreach (QModelIndex index, indexes) {
00059             if (index.column() != 0) continue;
00060 
00061             KCategorizedItemsViewModels::AbstractItem * item =
00062                 m_view->getItemByProxyIndex(index);
00063 
00064             if (item) {
00065                 rect.setSize(item->icon().actualSize(QSize(PIX_SIZE, PIX_SIZE)));
00066                 //painter.fillRect(rect, QBrush(QColor(255, 255, 255))); // TODO: Use global palettes
00067                 item->icon().paint(&painter, rect);
00068                 rect.moveTopLeft(rect.topLeft() + QPoint(off, off));
00069             }
00070         }
00071         painter.end();
00072 
00073 
00074         QDrag *drag = new QDrag(this);
00075         drag->setPixmap(pixmap);
00076         drag->setMimeData(data);
00077         drag->start(supportedActions);
00078         //drag->setHotSpot(d->pressedPosition - rect.topLeft());
00079         //if (drag->start(supportedActions) == Qt::MoveAction)
00080         //    d->clearOrRemove();
00081     }
00082 }
00083
libplasma

customdragtreeview.cpp

libplasma

API Reference
