qt-everywhere-src-5.15.1/qtbase/src/gui/kernel/qdnd_p.h

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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 <QtGui/private/qtguiglobal_p.h>
#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_REQUIRE_CONFIG(draganddrop);

QT_BEGIN_NAMESPACE

class QPlatformDrag;

class QDragPrivate : public QObjectPrivate
{
public:
    QDragPrivate()
        : source(nullptr)
        , target(nullptr)
        , data(nullptr)
    { }
    QObject *source;
    QObject *target;
    QMimeData *data;
    QPixmap pixmap;
    QPoint hotspot;
    Qt::DropAction executed_action;
    Qt::DropActions supported_actions;
    Qt::DropAction default_action;
    QMap<Qt::DropAction, QPixmap> customCursors;
};

class Q_GUI_EXPORT QDragManager : public QObject {
    Q_OBJECT

public:
    QDragManager();
    ~QDragManager();
    static QDragManager *self();

    Qt::DropAction drag(QDrag *);

    void setCurrentTarget(QObject *target, bool dropped = false);
    QObject *currentTarget() const;

    QPointer<QDrag> object() const { return m_object; }
    QObject *source() const;

private:
    QObject *m_currentDropTarget;
    QPlatformDrag *m_platformDrag;
    QPointer<QDrag> m_object;

    static QDragManager *m_instance;
    Q_DISABLE_COPY_MOVE(QDragManager)
};

QT_END_NAMESPACE

#endif // QDND_P_H