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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 QWINDOWSDRAG_H
#define QWINDOWSDRAG_H
#include "qwindowscombase.h"
#include "qwindowsinternalmimedata.h"
#include <qpa/qplatformdrag.h>
#include <QtGui/qpixmap.h>
#include <QtGui/qdrag.h>
struct IDropTargetHelper;
QT_BEGIN_NAMESPACE
class QPlatformScreen;
class QWindowsDropMimeData : public QWindowsInternalMimeData {
public:
QWindowsDropMimeData() = default;
IDataObject *retrieveDataObject() const override;
};
class QWindowsOleDropTarget : public QWindowsComBase<IDropTarget>
{
public:
explicit QWindowsOleDropTarget(QWindow *w);
~QWindowsOleDropTarget() override;
// IDropTarget methods
STDMETHOD(DragEnter)
(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect) override;
STDMETHOD(DragOver)(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect) override;
STDMETHOD(DragLeave)() override;
STDMETHOD(Drop)
(LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect) override;
private:
void handleDrag(QWindow *window, DWORD grfKeyState, const QPoint &, LPDWORD pdwEffect);
QWindow *const m_window;
QRect m_answerRect;
QPoint m_lastPoint;
DWORD m_chosenEffect = 0;
DWORD m_lastKeyState = 0;
};
class QWindowsDrag : public QPlatformDrag
{
public:
QWindowsDrag();
virtual ~QWindowsDrag();
Qt::DropAction drag(QDrag *drag) override;
static QWindowsDrag *instance();
void cancelDrag() override { QWindowsDrag::m_canceled = true; }
static bool isCanceled() { return QWindowsDrag::m_canceled; }
static bool isDragging() { return QWindowsDrag::m_dragging; }
IDataObject *dropDataObject() const { return m_dropDataObject; }
void setDropDataObject(IDataObject *dataObject) { m_dropDataObject = dataObject; }
void releaseDropDataObject();
QMimeData *dropData();
IDropTargetHelper* dropHelper();
private:
static bool m_canceled;
static bool m_dragging;
QWindowsDropMimeData m_dropData;
IDataObject *m_dropDataObject = nullptr;
IDropTargetHelper* m_cachedDropTargetHelper = nullptr;
};
QT_END_NAMESPACE
#endif // QWINDOWSDRAG_H
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