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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 QDND_P_H
#define QDND_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "QtCore/qobject.h"
#include "QtCore/qmap.h"
#include "QtCore/qmimedata.h"
#include "QtGui/qdrag.h"
#include "QtGui/qpixmap.h"
#include "QtGui/qcursor.h"
#include "QtGui/qwindow.h"
#include "QtCore/qpoint.h"
#include "private/qobject_p.h"
#include "QtGui/qbackingstore.h"
QT_BEGIN_NAMESPACE
class QEventLoop;
class QMouseEvent;
class QPlatformDrag;
#ifndef QT_NO_DRAGANDDROP
class Q_GUI_EXPORT QInternalMimeData : public QMimeData
{
Q_OBJECT
public:
QInternalMimeData();
~QInternalMimeData();
bool hasFormat(const QString &mimeType) const;
QStringList formats() const;
static bool canReadData(const QString &mimeType);
static QStringList formatsHelper(const QMimeData *data);
static bool hasFormatHelper(const QString &mimeType, const QMimeData *data);
static QByteArray renderDataHelper(const QString &mimeType, const QMimeData *data);
protected:
QVariant retrieveData(const QString &mimeType, QVariant::Type type) const;
virtual bool hasFormat_sys(const QString &mimeType) const = 0;
virtual QStringList formats_sys() const = 0;
virtual QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const = 0;
};
class QDragPrivate : public QObjectPrivate
{
public:
QObject *source;
QObject *target;
QMimeData *data;
QPixmap pixmap;
QPoint hotspot;
Qt::DropActions possible_actions;
Qt::DropAction executed_action;
QMap<Qt::DropAction, QPixmap> customCursors;
Qt::DropAction defaultDropAction;
};
class QShapedPixmapWindow : public QWindow
{
public:
QShapedPixmapWindow();
void exposeEvent(QExposeEvent *)
{
render();
}
void render();
QBackingStore *backingStore;
QPixmap pixmap;
QPoint hotSpot;
};
class Q_GUI_EXPORT QDragManager : public QObject {
Q_OBJECT
// only friend classes can use QDragManager.
friend class QDrag;
friend class QDragMoveEvent;
friend class QDropEvent;
friend class QApplication;
bool eventFilter(QObject *, QEvent *);
public:
QDragManager();
~QDragManager();
static QDragManager *self();
virtual Qt::DropAction drag(QDrag *);
virtual void cancel(bool deleteSource = true);
virtual void move(const QMouseEvent *me);
virtual void drop(const QMouseEvent *me);
void updatePixmap();
void updateCursor();
Qt::DropAction defaultAction(Qt::DropActions possibleActions,
Qt::KeyboardModifiers modifiers) const;
QPixmap dragCursor(Qt::DropAction action) const;
QDragPrivate *dragPrivate() const { return object ? object->d_func() : 0; }
inline QMimeData *dropData()
{ return object ? dragPrivate()->data : platformDropData; }
void emitActionChanged(Qt::DropAction newAction) { if (object) emit object->actionChanged(newAction); }
void setCurrentTarget(QObject *target, bool dropped = false);
QObject *currentTarget();
QDrag *object;
bool beingCancelled;
bool restoreCursor;
bool willDrop;
QEventLoop *eventLoop;
Qt::DropActions possible_actions;
// Shift/Ctrl handling, and final drop status
Qt::DropAction global_accepted_action;
QShapedPixmapWindow *shapedPixmapWindow;
void unmanageEvents();
void stopDrag();
private:
QMimeData *platformDropData;
Qt::DropAction currentActionForOverrideCursor;
QObject *currentDropTarget;
QPlatformDrag *platformDrag;
static QDragManager *instance;
Q_DISABLE_COPY(QDragManager)
};
#endif // !QT_NO_DRAGANDDROP
QT_END_NAMESPACE
#endif // QDND_P_H
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