qwindowsole.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QWINDOWSOLE_H
#define QWINDOWSOLE_H
 
#include <QtCore/qt_windows.h>
 
#include <QtCore/qlist.h>
#include <QtCore/qmap.h>
#include <QtCore/qpointer.h>
#include <QtCore/private/qcomobject_p.h>
 
#include <objidl.h>
 
QT_BEGIN_NAMESPACE
 
class QMimeData;
class QWindow;
 
class QWindowsOleDataObject : public QComObject<IDataObject>
{
public:
    explicit QWindowsOleDataObject(QMimeData *mimeData);
    ~QWindowsOleDataObject() override;
 
    void releaseQt();
    QMimeData *mimeData() const;
    DWORD reportedPerformedEffect() const;
 
    // IDataObject methods
    STDMETHOD(GetData)(LPFORMATETC pformatetcIn, LPSTGMEDIUM pmedium) override;
    STDMETHOD(GetDataHere)(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium) override;
    STDMETHOD(QueryGetData)(LPFORMATETC pformatetc) override;
    STDMETHOD(GetCanonicalFormatEtc)(LPFORMATETC pformatetc, LPFORMATETC pformatetcOut) override;
    STDMETHOD(SetData)(LPFORMATETC pformatetc, STGMEDIUM FAR *pmedium, BOOL fRelease) override;
    STDMETHOD(EnumFormatEtc)(DWORD dwDirection, LPENUMFORMATETC FAR *ppenumFormatEtc) override;
    STDMETHOD(DAdvise)
    (FORMATETC FAR *pFormatetc, DWORD advf, LPADVISESINK pAdvSink,
     DWORD FAR *pdwConnection) override;
    STDMETHOD(DUnadvise)(DWORD dwConnection) override;
    STDMETHOD(EnumDAdvise)(LPENUMSTATDATA FAR *ppenumAdvise) override;
 
private:
    QPointer<QMimeData> data;
    const int CF_PERFORMEDDROPEFFECT;
    DWORD performedEffect = DROPEFFECT_NONE;
};
 
class QWindowsOleEnumFmtEtc : public QComObject<IEnumFORMATETC>
{
public:
    explicit QWindowsOleEnumFmtEtc(const QList<FORMATETC> &fmtetcs);
    explicit QWindowsOleEnumFmtEtc(const QList<LPFORMATETC> &lpfmtetcs);
    ~QWindowsOleEnumFmtEtc() override;
 
    bool isNull() const;
 
    // IEnumFORMATETC methods
    STDMETHOD(Next)(ULONG celt, LPFORMATETC rgelt, ULONG FAR *pceltFetched) override;
    STDMETHOD(Skip)(ULONG celt) override;
    STDMETHOD(Reset)(void) override;
    STDMETHOD(Clone)(LPENUMFORMATETC FAR *newEnum) override;
 
private:
    bool copyFormatEtc(LPFORMATETC dest, const FORMATETC *src) const;
 
    ULONG m_nIndex = 0;
    QList<LPFORMATETC> m_lpfmtetcs;
    bool m_isNull = false;
};
 
QT_END_NAMESPACE
 
#endif // QWINDOWSOLE_H