QGraphicsScene图形框多长才会有滚轮?
时间: 2024-04-28 10:18:59 浏览: 45
根据提供的引用内容,无法直接找到关于QGraphicsScene图形框多长才会有滚轮的信息。引用提到了通过QGraphicsScene::addItem()将图元添加到场景中,并且通过QGraphicsScene::items()和QGraphicsScene::itemAt()等函数可以检索和操作图元。引用列举了一些基本的图形元件,如椭圆项、直线项、多边形项等,并提到了通过setVisible()和setEnabled()等函数来设置图元的可见性和启用性,以及如何选择图元。引用则涉及到自定义的图元和场景类。综上所述,没有提供QGraphicsScene图形框多长才会有滚轮的具体信息。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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