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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QXCBDRAG_H
#define QXCBDRAG_H
#include <qpa/qplatformdrag.h>
#include <private/qsimpledrag_p.h>
#include <qxcbobject.h>
#include <xcb/xcb.h>
#include <qlist.h>
#include <qpoint.h>
#include <qrect.h>
#include <qsharedpointer.h>
#include <qpointer.h>
#include <qvector.h>
#include <qdatetime.h>
#include <qpixmap.h>
#include <qbackingstore.h>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_DRAGANDDROP
class QMouseEvent;
class QWindow;
class QXcbConnection;
class QXcbWindow;
class QXcbDropData;
class QXcbScreen;
class QDrag;
class QShapedPixmapWindow;
class QXcbDrag : public QXcbObject, public QBasicDrag
{
public:
QXcbDrag(QXcbConnection *c);
~QXcbDrag();
virtual QMimeData *platformDropData();
void startDrag();
void cancel();
void move(const QMouseEvent *me);
void drop(const QMouseEvent *me);
void endDrag();
void handleEnter(QWindow *window, const xcb_client_message_event_t *event);
void handlePosition(QWindow *w, const xcb_client_message_event_t *event);
void handleLeave(QWindow *w, const xcb_client_message_event_t *event);
void handleDrop(QWindow *, const xcb_client_message_event_t *event);
void handleStatus(const xcb_client_message_event_t *event);
void handleSelectionRequest(const xcb_selection_request_event_t *event);
void handleFinished(const xcb_client_message_event_t *event);
bool dndEnable(QXcbWindow *win, bool on);
void updatePixmap();
xcb_timestamp_t targetTime() { return target_time; }
protected:
void timerEvent(QTimerEvent* e);
private:
friend class QXcbDropData;
void init();
void handle_xdnd_position(QWindow *w, const xcb_client_message_event_t *event);
void handle_xdnd_status(const xcb_client_message_event_t *event);
void send_leave();
Qt::DropAction toDropAction(xcb_atom_t atom) const;
xcb_atom_t toXdndAction(Qt::DropAction a) const;
QPointer<QWindow> currentWindow;
QPoint currentPosition;
QXcbDropData *dropData;
Qt::DropAction accepted_drop_action;
QWindow *desktop_proxy;
xcb_atom_t xdnd_dragsource;
// the types in this drop. 100 is no good, but at least it's big.
enum { xdnd_max_type = 100 };
QList<xcb_atom_t> xdnd_types;
// timestamp from XdndPosition and XdndDroptime for retrieving the data
xcb_timestamp_t target_time;
xcb_timestamp_t source_time;
// rectangle in which the answer will be the same
QRect source_sameanswer;
bool waiting_for_status;
// top-level window we sent position to last.
xcb_window_t current_target;
// window to send events to (always valid if current_target)
xcb_window_t current_proxy_target;
QXcbScreen *current_screen;
// 10 minute timer used to discard old XdndDrop transactions
enum { XdndDropTransactionTimeout = 600000 };
int cleanup_timer;
QVector<xcb_atom_t> drag_types;
struct Transaction
{
xcb_timestamp_t timestamp;
xcb_window_t target;
xcb_window_t proxy_target;
QWindow *targetWindow;
// QWidget *embedding_widget;
QDrag *drag;
QTime time;
};
QList<Transaction> transactions;
int transaction_expiry_timer;
void restartDropExpiryTimer();
int findTransactionByWindow(xcb_window_t window);
int findTransactionByTime(xcb_timestamp_t timestamp);
xcb_window_t findRealWindow(const QPoint & pos, xcb_window_t w, int md, bool ignoreNonXdndAwareWindows);
};
#endif // QT_NO_DRAGANDDROP
QT_END_NAMESPACE
#endif
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