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並前往https://books.google.com.tw/books?id=kPBZDwAAQBAJ&pg=PA117&lpg=PA117&dq=qgraphicsitem&source=bl&ots=0hYIvAN0zK&sig=ACfU3U1NsjLCvCjsFd0919Iwan6JqimlYQ&hl=zh-TW&sa=X&ved=2ahUKEwih1JyKz4f1AhUMSvEDHXylC8kQ6AF6BAgTEAM

Game Programming using Qt 5 Beginner's Guide: Create amazing ...

Try to add parent->setFlag(QGraphicsItem::ItemIsMovable, true) to our createComplexItem function and drag around the rectangles.

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