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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QXCBDRAG_H
#define QXCBDRAG_H
#include <qplatformdrag_qpa.h>
#include <qxcbobject.h>
#include <xcb/xcb.h>
#include <qlist.h>
#include <qpoint.h>
#include <qrect.h>
#include <qsharedpointer.h>
#include <qvector.h>
QT_BEGIN_NAMESPACE
class QMouseEvent;
class QWindow;
class QXcbConnection;
class QXcbWindow;
class QDropData;
class QXcbScreen;
class QDrag;
class QXcbDrag : public QObject, public QXcbObject, public QPlatformDrag
{
public:
QXcbDrag(QXcbConnection *c);
~QXcbDrag();
virtual QMimeData *platformDropData();
// virtual Qt::DropAction drag(QDrag *);
virtual void startDrag();
virtual void cancel();
virtual void move(const QMouseEvent *me);
virtual 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, bool passive);
void handleLeave(QWindow *w, const xcb_client_message_event_t *event, bool /*passive*/);
void handleDrop(QWindow *, const xcb_client_message_event_t *event, bool passive);
void handleStatus(const xcb_client_message_event_t *event, bool passive);
void handleSelectionRequest(const xcb_selection_request_event_t *event);
void handleFinished(const xcb_client_message_event_t *event, bool passive);
bool dndEnable(QXcbWindow *win, bool on);
protected:
void timerEvent(QTimerEvent* e);
private:
friend class QDropData;
void init();
void handle_xdnd_position(QWindow *w, const xcb_client_message_event_t *event, bool passive);
void handle_xdnd_status(const xcb_client_message_event_t *event, bool);
void send_leave();
Qt::DropAction toDropAction(xcb_atom_t atom) const;
xcb_atom_t toXdndAction(Qt::DropAction a) const;
QWeakPointer<QWindow> currentWindow;
QPoint currentPosition;
QDropData *dropData;
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;
xcb_timestamp_t target_time;
xcb_timestamp_t source_time;
Qt::DropAction last_target_accepted_action;
// 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;
int heartbeat;
bool xdnd_dragging;
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 *object;
};
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);
};
QT_END_NAMESPACE
#endif
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