src/draganddrophelper.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "draganddrophelper.h"
  21
  22 #include <kdirmodel.h>
  23 #include <kicon.h>
  24
  25 #include <QAbstractItemView>
  26 #include <QAbstractProxyModel>
  27 #include <QBrush>
  28 #include <QDrag>
  29 #include <QPainter>
  30 #include <QRect>
  31 #include <QWidget>
  32
  33 void DragAndDropHelper::startDrag(QAbstractItemView* itemView, Qt::DropActions supportedActions)
  34 {
  35     QModelIndexList indexes = itemView->selectionModel()->selectedIndexes();
  36     if (indexes.count() > 0) {
  37         QMimeData *data = itemView->model()->mimeData(indexes);
  38         if (data == 0) {
  39             return;
  40         }
  41
  42         QDrag* drag = new QDrag(itemView);
  43         QPixmap pixmap;
  44         if (indexes.count() == 1) {
  45             QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(itemView->model());
  46             KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
  47             const QModelIndex index = proxyModel->mapToSource(indexes.first());
  48
  49             const KFileItem item = dirModel->itemForIndex(index);
  50             pixmap = item.pixmap(KIconLoader::SizeMedium, KIconLoader::SizeMedium);
  51         } else {
  52             pixmap = KIcon("item-drag-multiple").pixmap(KIconLoader::SizeMedium, KIconLoader::SizeMedium);
  53         }
  54         drag->setPixmap(pixmap);
  55         drag->setMimeData(data);
  56         drag->exec(supportedActions);
  57     }
  58 }
  59
  60 void DragAndDropHelper::drawHoverIndication(QWidget* widget,
  61                                             const QRect& bounds,
  62                                             const QBrush& brush)
  63 {
  64     if (bounds.isEmpty()) {
  65         return;
  66     }
  67
  68     QPainter painter(widget);
  69     painter.save();
  70     QBrush blendedBrush(brush);
  71     QColor color = blendedBrush.color();
  72     color.setAlpha(64);
  73     blendedBrush.setColor(color);
  74
  75     const int radius = 10;
  76     QPainterPath path(QPointF(bounds.left(), bounds.top() + radius));
  77     path.quadTo(bounds.left(), bounds.top(), bounds.left() + radius, bounds.top());
  78     path.lineTo(bounds.right() - radius, bounds.top());
  79     path.quadTo(bounds.right(), bounds.top(), bounds.right(), bounds.top() + radius);
  80     path.lineTo(bounds.right(), bounds.bottom() - radius);
  81     path.quadTo(bounds.right(), bounds.bottom(), bounds.right() - radius, bounds.bottom());
  82     path.lineTo(bounds.left() + radius, bounds.bottom());
  83     path.quadTo(bounds.left(), bounds.bottom(), bounds.left(), bounds.bottom() - radius);
  84     path.closeSubpath();
  85
  86     painter.setRenderHint(QPainter::Antialiasing);
  87     painter.fillPath(path, blendedBrush);
  88     painter.restore();
  89 }