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/***************************************************************************
* 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"
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