qt-everywhere-src-5.15.1/qtbase/tests/manual/highdpi/dragwidget.h

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 ** This file is part of the test suite of the Qt Toolkit.
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#ifndef DRAGWIDGET_H
#define DRAGWIDGET_H

#include <QWidget>
#include <QBasicTimer>

QT_BEGIN_NAMESPACE
class QDragEnterEvent;
class QDropEvent;
QT_END_NAMESPACE

class DragWidget : public QWidget
{
public:
    DragWidget(QString text = QString(), QWidget *parent = nullptr);

protected:
    void dragEnterEvent(QDragEnterEvent *event) override;
    void dragLeaveEvent(QDragLeaveEvent *event) override;
    void dropEvent(QDropEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void dragMoveEvent(QDragMoveEvent * event) override;
    void paintEvent(QPaintEvent *) override;
    void timerEvent(QTimerEvent *event) override;
    void showEvent(QShowEvent *event) override;
    void hideEvent(QHideEvent *event) override;

private:
    QPoint dragPos;
    QPoint dropPos;
    QBasicTimer dragTimer;
    QBasicTimer dropTimer;
    QWidget *otherWindow = nullptr;
};

#endif // DRAGWIDGET_H