qt5base-lts/examples/widgets/draganddrop/dropsite/droparea.h

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#ifndef DROPAREA_H
#define DROPAREA_H

#include <QLabel>

QT_BEGIN_NAMESPACE
class QMimeData;
QT_END_NAMESPACE

//! [DropArea header part1]
class DropArea : public QLabel
{
    Q_OBJECT

public:
    DropArea(QWidget *parent = 0);

public slots:
    void clear();

signals:
    void changed(const QMimeData *mimeData = 0);
//! [DropArea header part1]

//! [DropArea header part2]
protected:
    void dragEnterEvent(QDragEnterEvent *event) Q_DECL_OVERRIDE;
    void dragMoveEvent(QDragMoveEvent *event) Q_DECL_OVERRIDE;
    void dragLeaveEvent(QDragLeaveEvent *event) Q_DECL_OVERRIDE;
    void dropEvent(QDropEvent *event) Q_DECL_OVERRIDE;

private:
    QLabel *label;
};
//! [DropArea header part2]

#endif // DROPAREA_H