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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

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** 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

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** In addition, as a special exception, Nokia gives you certain additional

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** $QT_END_LICENSE$

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****************************************************************************/

#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 "QtGui/qmime.h"

#include "QtGui/qdrag.h"

#include "QtGui/qpixmap.h"

#include "QtGui/qcursor.h"

#include "QtCore/qpoint.h"

#include "private/qobject_p.h"

#ifdef Q_WS_MAC

# include "private/qt_mac_p.h"

#endif

#if defined(Q_WS_WIN)

# include <qt_windows.h>

# include <objidl.h>

#endif

QT_BEGIN_NAMESPACE

class QEventLoop;

#if !(defined(QT_NO_DRAGANDDROP) && defined(QT_NO_CLIPBOARD))

class 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;

};

#ifdef Q_WS_WIN

class QOleDataObject : public IDataObject

{

public:

    explicit QOleDataObject(QMimeData *mimeData);

    virtual ~QOleDataObject();

    void releaseQt();

    const QMimeData *mimeData() const;

    DWORD reportedPerformedEffect() const;

    // IUnknown methods

    STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);

    STDMETHOD_(ULONG,AddRef)(void);

    STDMETHOD_(ULONG,Release)(void);

    // IDataObject methods

    STDMETHOD(GetData)(LPFORMATETC pformatetcIn, LPSTGMEDIUM pmedium);

    STDMETHOD(GetDataHere)(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium);

    STDMETHOD(QueryGetData)(LPFORMATETC pformatetc);

    STDMETHOD(GetCanonicalFormatEtc)(LPFORMATETC pformatetc, LPFORMATETC pformatetcOut);

    STDMETHOD(SetData)(LPFORMATETC pformatetc, STGMEDIUM FAR * pmedium,

                       BOOL fRelease);

    STDMETHOD(EnumFormatEtc)(DWORD dwDirection, LPENUMFORMATETC FAR* ppenumFormatEtc);

    STDMETHOD(DAdvise)(FORMATETC FAR* pFormatetc, DWORD advf,

                      LPADVISESINK pAdvSink, DWORD FAR* pdwConnection);

    STDMETHOD(DUnadvise)(DWORD dwConnection);

    STDMETHOD(EnumDAdvise)(LPENUMSTATDATA FAR* ppenumAdvise);

private:

    ULONG m_refs;

    QPointer<QMimeData> data;

    int CF_PERFORMEDDROPEFFECT;

    DWORD performedEffect;

};

class QOleEnumFmtEtc : public IEnumFORMATETC

{

public:

    explicit QOleEnumFmtEtc(const QVector<FORMATETC> &fmtetcs);

    explicit QOleEnumFmtEtc(const QVector<LPFORMATETC> &lpfmtetcs);

    virtual ~QOleEnumFmtEtc();

    bool isNull() const;

    // IUnknown methods

    STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);

    STDMETHOD_(ULONG,AddRef)(void);

    STDMETHOD_(ULONG,Release)(void);

    // IEnumFORMATETC methods

    STDMETHOD(Next)(ULONG celt, LPFORMATETC rgelt, ULONG FAR* pceltFetched);

    STDMETHOD(Skip)(ULONG celt);

    STDMETHOD(Reset)(void);

    STDMETHOD(Clone)(LPENUMFORMATETC FAR* newEnum);

private:

    bool copyFormatEtc(LPFORMATETC dest, LPFORMATETC src) const;

    ULONG m_dwRefs;

    ULONG m_nIndex;

    QVector<LPFORMATETC> m_lpfmtetcs;

    bool m_isNull;

};

#endif

#endif //QT_NO_DRAGANDDROP && QT_NO_CLIPBOARD

#ifndef QT_NO_DRAGANDDROP

class QDragPrivate : public QObjectPrivate

{

public:

    QWidget *source;

    QWidget *target;

    QMimeData *data;

    QPixmap pixmap;

    QPoint hotspot;

    Qt::DropActions possible_actions;

    Qt::DropAction executed_action;

    QMap<Qt::DropAction, QPixmap> customCursors;

    Qt::DropAction defaultDropAction;

};

class QDropData : public QInternalMimeData

{

    Q_OBJECT

public:

    QDropData();

    ~QDropData();

protected:

    bool hasFormat_sys(const QString &mimeType) const;

    QStringList formats_sys() const;

    QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const;

#if defined(Q_WS_WIN)

public:

    LPDATAOBJECT currentDataObject;

#endif

};

class QDragManager: public QObject {

    Q_OBJECT

    QDragManager();

    ~QDragManager();

    // only friend classes can use QDragManager.

    friend class QDrag;

    friend class QDragMoveEvent;

    friend class QDropEvent;

    friend class QApplication;

#ifdef Q_WS_MAC

    friend class QWidgetPrivate; //dnd is implemented here

#endif

    bool eventFilter(QObject *, QEvent *);

    void timerEvent(QTimerEvent*);

public:

    Qt::DropAction drag(QDrag *);

    void cancel(bool deleteSource = true);

    void move(const QPoint &);

    void drop();

    void updatePixmap();

    QWidget *source() const { return object ? object->d_func()->source : 0; }

    QDragPrivate *dragPrivate() const { return object ? object->d_func() : 0; }

    static QDragPrivate *dragPrivate(QDrag *drag) { return drag ? drag->d_func() : 0; }

    static QDragManager *self();

    Qt::DropAction defaultAction(Qt::DropActions possibleActions,

                                 Qt::KeyboardModifiers modifiers) const;

    QDrag *object;

    void updateCursor();

    bool beingCancelled;

    bool restoreCursor;

    bool willDrop;

    QEventLoop *eventLoop;

    QPixmap dragCursor(Qt::DropAction action) const;

    bool hasCustomDragCursors() const;

    QDropData *dropData;

    void emitActionChanged(Qt::DropAction newAction) { if (object) emit object->actionChanged(newAction); }

    void setCurrentTarget(QWidget *target, bool dropped = false);

    QWidget *currentTarget();

#ifdef Q_WS_X11

    QPixmap xdndMimeTransferedPixmap[2];

    int xdndMimeTransferedPixmapIndex;

#endif

private:

    QPixmap *pm_cursor;

    int n_cursor;

#ifdef Q_WS_QWS

    Qt::DropAction currentActionForOverrideCursor;

#endif

#ifdef Q_OS_SYMBIAN

#ifndef QT_NO_CURSOR 

    QCursor overrideCursor;

#endif

#endif

    QWidget *currentDropTarget;

    static QDragManager *instance;

    Q_DISABLE_COPY(QDragManager)

};

#if defined(Q_WS_WIN)

class QOleDropTarget : public IDropTarget

{

public:

    QOleDropTarget(QWidget* w);

    virtual ~QOleDropTarget() {}

    void releaseQt();

    // IUnknown methods

    STDMETHOD(QueryInterface)(REFIID riid, void FAR* FAR* ppvObj);

    STDMETHOD_(ULONG, AddRef)(void);

    STDMETHOD_(ULONG, Release)(void);

    // IDropTarget methods

    STDMETHOD(DragEnter)(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);

    STDMETHOD(DragOver)(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);

    STDMETHOD(DragLeave)();

    STDMETHOD(Drop)(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);

private:

    ULONG m_refs;

    QWidget* widget;

    QPointer<QWidget> currentWidget;

    QRect answerRect;

    QPoint lastPoint;

    DWORD chosenEffect;

    DWORD lastKeyState;

    void sendDragEnterEvent(QWidget *to, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);

};

#endif

#if defined (Q_WS_MAC)

class QCocoaDropData : public QInternalMimeData

{

    Q_OBJECT

public:

    QCocoaDropData(CFStringRef pasteboard);

    ~QCocoaDropData();

protected:

    bool hasFormat_sys(const QString &mimeType) const;

    QStringList formats_sys() const;

    QVariant retrieveData_sys(const QString &mimeType, QVariant::Type type) const;

public:

    CFStringRef dropPasteboard;

};

#endif

#endif // !QT_NO_DRAGANDDROP

QT_END_NAMESPACE

#endif // QDND_P_H