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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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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