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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++ #include <QPaintEvent>
++ #include <QPainter>
++
++ namespace src_gui_painting_qregion {
++ struct MyWidget : public QPaintDevice
++ {
++ void paintEvent(QPaintEvent *);
++ };
++
++ //! [0]
++ void MyWidget::paintEvent(QPaintEvent *)
++ {
++ QRegion r1(QRect(100, 100, 200, 80), // r1: elliptic region
++ QRegion::Ellipse);
++ QRegion r2(QRect(100, 120, 90, 30)); // r2: rectangular region
++ QRegion r3 = r1.intersected(r2); // r3: intersection
++
++ QPainter painter(this);
++ painter.setClipRegion(r3);
++ // ... // paint clipped graphics
++ }
++ //! [0]
++
++ } // src_gui_painting_qregion