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Diffstat (limited to 'src/views/draganddrophelper.cpp')
| -rw-r--r-- | src/views/draganddrophelper.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/views/draganddrophelper.cpp b/src/views/draganddrophelper.cpp new file mode 100644 index 000000000..0cca59ac4 --- /dev/null +++ b/src/views/draganddrophelper.cpp @@ -0,0 +1,189 @@ +/*************************************************************************** + * Copyright (C) 2007 by Peter Penz <[email protected]> * + * Copyright (C) 2007 by David Faure <[email protected]> * + * * + * 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 of the License, 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. * + * * + * You should have received a copy of the GNU 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 "draganddrophelper.h" + +#include <kdirmodel.h> +#include <kfileitem.h> +#include <kicon.h> +#include <klocale.h> +#include <konq_operations.h> + +#include "views/dolphiniconsview.h" +#include "views/dolphinviewcontroller.h" + +#include <QAbstractItemView> +#include <QAbstractProxyModel> +#include <QtDBus> +#include <QDrag> +#include <QPainter> + +class DragAndDropHelperSingleton +{ +public: + DragAndDropHelper instance; +}; +K_GLOBAL_STATIC(DragAndDropHelperSingleton, s_dragAndDropHelper) + +DragAndDropHelper& DragAndDropHelper::instance() +{ + return s_dragAndDropHelper->instance; +} + +bool DragAndDropHelper::isMimeDataSupported(const QMimeData* mimeData) const +{ + return mimeData->hasUrls() || mimeData->hasFormat("application/x-kde-dndextract"); +} + +void DragAndDropHelper::startDrag(QAbstractItemView* itemView, + Qt::DropActions supportedActions, + DolphinViewController* dolphinViewController) +{ + // Do not start a new drag until the previous one has been finished. + // This is a (possibly temporary) fix for bug #187884. + static bool isDragging = false; + if (isDragging) { + return; + } + isDragging = true; + + const QModelIndexList indexes = itemView->selectionModel()->selectedIndexes(); + if (!indexes.isEmpty()) { + QMimeData *data = itemView->model()->mimeData(indexes); + if (data == 0) { + return; + } + + if (dolphinViewController != 0) { + dolphinViewController->requestToolTipHiding(); + } + + QDrag* drag = new QDrag(itemView); + drag->setPixmap(createDragPixmap(itemView)); + drag->setMimeData(data); + + m_dragSource = itemView; + drag->exec(supportedActions, Qt::IgnoreAction); + m_dragSource = 0; + } + isDragging = false; +} + +bool DragAndDropHelper::isDragSource(QAbstractItemView* itemView) const +{ + return (m_dragSource != 0) && (m_dragSource == itemView); +} + +void DragAndDropHelper::dropUrls(const KFileItem& destItem, + const KUrl& destPath, + QDropEvent* event, + QWidget* widget) +{ + const bool dropToItem = !destItem.isNull() && (destItem.isDir() || destItem.isDesktopFile()); + const KUrl destination = dropToItem ? destItem.url() : destPath; + + const QMimeData* mimeData = event->mimeData(); + if (mimeData->hasFormat("application/x-kde-dndextract")) { + QString remoteDBusClient = mimeData->data("application/x-kde-dndextract"); + QDBusMessage message = QDBusMessage::createMethodCall(remoteDBusClient, "/DndExtract", + "org.kde.DndExtract", "extractSelectedFilesTo"); + message.setArguments(QVariantList() << destination.path()); + QDBusConnection::sessionBus().call(message); + } else { + const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData()); + const int urlsCount = urls.count(); + if (urlsCount == 0) { + // TODO: handle dropping of other data + } else if ((urlsCount == 1) && (urls.first() == destination)) { + emit errorMessage(i18nc("@info:status", "A folder cannot be dropped into itself")); + } else if (dropToItem) { + KonqOperations::doDrop(destItem, destination, event, widget); + } else { + KonqOperations::doDrop(KFileItem(), destination, event, widget); + } + } +} + +DragAndDropHelper::DragAndDropHelper() + : m_dragSource(0) +{ +} + +QPixmap DragAndDropHelper::createDragPixmap(QAbstractItemView* itemView) const +{ + const QModelIndexList selectedIndexes = itemView->selectionModel()->selectedIndexes(); + Q_ASSERT(!selectedIndexes.isEmpty()); + + QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(itemView->model()); + KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel()); + + const int itemCount = selectedIndexes.count(); + + // If more than one item is dragged, align the items inside a + // rectangular grid. The maximum grid size is limited to 5 x 5 items. + int xCount = 3; + int size = KIconLoader::SizeMedium; + if (itemCount > 16) { + xCount = 5; + size = KIconLoader::SizeSmall; + } else if (itemCount > 9) { + xCount = 4; + size = KIconLoader::SizeSmallMedium; + } + + if (itemCount < xCount) { + xCount = itemCount; + } + + int yCount = itemCount / xCount; + if (itemCount % xCount != 0) { + ++yCount; + } + if (yCount > xCount) { + yCount = xCount; + } + + // Draw the selected items into the grid cells + QPixmap dragPixmap(xCount * size + xCount - 1, yCount * size + yCount - 1); + dragPixmap.fill(Qt::transparent); + + QPainter painter(&dragPixmap); + int x = 0; + int y = 0; + foreach (const QModelIndex& selectedIndex, selectedIndexes) { + const QModelIndex index = proxyModel->mapToSource(selectedIndex); + const KFileItem item = dirModel->itemForIndex(index); + const QPixmap pixmap = item.pixmap(size, size); + painter.drawPixmap(x, y, pixmap); + + x += size + 1; + if (x >= dragPixmap.width()) { + x = 0; + y += size + 1; + } + if (y >= dragPixmap.height()) { + break; + } + } + + return dragPixmap; +} + +#include "draganddrophelper.moc" |