src/draganddrophelper.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                  *
   3  *   Copyright (C) 2007 by David Faure <faure@kde.org>                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "draganddrophelper.h"
  22 #include "dolphiniconsview.h"
  23 #include "dolphincontroller.h"
  24
  25 #include <kdirmodel.h>
  26 #include <kfileitem.h>
  27 #include <kicon.h>
  28 #include <klocale.h>
  29 #include <kdebug.h>
  30 #include <konq_operations.h>
  31
  32 #include <QAbstractItemView>
  33 #include <QAbstractProxyModel>
  34 #include <QtDBus>
  35 #include <QDrag>
  36
  37 class DragAndDropHelperSingleton
  38 {
  39 public:
  40     DragAndDropHelper instance;
  41 };
  42 K_GLOBAL_STATIC(DragAndDropHelperSingleton, s_dragAndDropHelper)
  43
  44 DragAndDropHelper& DragAndDropHelper::instance()
  45 {
  46     return s_dragAndDropHelper->instance;
  47 }
  48
  49 bool DragAndDropHelper::isMimeDataSupported(const QMimeData* mimeData) const
  50 {
  51     return mimeData->hasUrls() || mimeData->hasFormat("application/x-kde-dndextract");
  52 }
  53
  54 void DragAndDropHelper::startDrag(QAbstractItemView* itemView,
  55                                   Qt::DropActions supportedActions,
  56                                   DolphinController* controller)
  57 {
  58     // Do not start a new drag until the previous one has been finished.
  59     // This is a (possibly temporary) fix for bug #187884.
  60     static bool isDragging = false;
  61     if (isDragging) {
  62         return;
  63     }
  64     isDragging = true;
  65
  66     QModelIndexList indexes = itemView->selectionModel()->selectedIndexes();
  67     if (indexes.count() > 0) {
  68         QMimeData *data = itemView->model()->mimeData(indexes);
  69         if (data == 0) {
  70             return;
  71         }
  72
  73         if (controller != 0) {
  74             controller->emitHideToolTip();
  75         }
  76
  77         QDrag* drag = new QDrag(itemView);
  78         QPixmap pixmap;
  79         if (indexes.count() == 1) {
  80             QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(itemView->model());
  81             KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
  82             const QModelIndex index = proxyModel->mapToSource(indexes.first());
  83
  84             const KFileItem item = dirModel->itemForIndex(index);
  85             pixmap = item.pixmap(KIconLoader::SizeMedium, KIconLoader::SizeMedium);
  86         } else {
  87             pixmap = KIcon("document-multiple").pixmap(KIconLoader::SizeMedium, KIconLoader::SizeMedium);
  88         }
  89         drag->setPixmap(pixmap);
  90         drag->setMimeData(data);
  91
  92         m_dragSource = itemView;
  93         drag->exec(supportedActions, Qt::IgnoreAction);
  94         m_dragSource = 0;
  95     }
  96     isDragging = false;
  97 }
  98
  99 bool DragAndDropHelper::isDragSource(QAbstractItemView* itemView)
 100 {
 101     return (m_dragSource != 0) && (m_dragSource == itemView);
 102 }
 103
 104 void DragAndDropHelper::dropUrls(const KFileItem& destItem,
 105                                  const KUrl& destPath,
 106                                  QDropEvent* event,
 107                                  QWidget* widget)
 108 {
 109     const bool dropToItem = !destItem.isNull() && (destItem.isDir() || destItem.isDesktopFile());
 110     const KUrl destination = dropToItem ? destItem.url() : destPath;
 111
 112     const QMimeData* mimeData = event->mimeData();
 113     if (mimeData->hasFormat("application/x-kde-dndextract")) {
 114         QString remoteDBusClient = mimeData->data("application/x-kde-dndextract");
 115         QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient, "/DndExtract",
 116                                                               "org.kde.DndExtract", "extractSelectedFilesTo");
 117         message.setArguments(QVariantList() << destination.path());
 118         QDBusConnection::sessionBus().call(message);
 119     } else {
 120         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 121         const int urlsCount = urls.count();
 122         if (urlsCount == 0) {
 123             // TODO: handle dropping of other data
 124         } else if ((urlsCount == 1) && (urls.first() == destination)) {
 125             emit errorMessage(i18nc("@info:status", "A folder cannot be dropped into itself"));
 126         } else if (dropToItem) {
 127             KonqOperations::doDrop(destItem, destination, event, widget);
 128         } else {
 129             KonqOperations::doDrop(KFileItem(), destination, event, widget);
 130         }
 131     }
 132 }
 133
 134 DragAndDropHelper::DragAndDropHelper()
 135     : m_dragSource(0)
 136 {
 137 }
 138
 139 #include "draganddrophelper.moc"