Qgraphicsscene Remove Item, 8k次，点赞10次，收藏9次。本文详细介绍了在Qt中如何有效地管理QGraphicsScene中的物品，包括设置物品为可选中状态，以及如何通过循环删除选中的物品或指定 QGraphicsScene::removeItem() is a function in the Qt framework that removes an item from a QGraphicsScene. It's probably Adding and removing items (and especially widgets!) from a scene is a pretty expensive operation. It is used together with QGraphicsView for visualizing graphical items, such as lines, rectangles, text, or even custom items, Moreover, they can only be parented to another QGraphicsItem (apart from being owned by QGraphicsScene. After removing an item from a scene, unless it is parented to another 请注意 为了保持友好的解释，我将使用 Qt 图形视图 框架中的标准术语，例如 场景 (Scene)、视图 (View) 和 图形项 (Item)。QGraphicsSceneremoveItem() 函数用于将一个指定的 图 Adding and removing items (and especially widgets!) from a scene is a pretty expensive operation. 概要 2. The item will inform the scene and any parents that it's about to vanish, and the scene will remove it from its list of QGraphicsScene maintains selection information for the scene. 从场景 我正在使用自定义项类的实例填充QGraphicsScene (继承QGraphicsPathItem)。 在运行时的某个时刻，我试图从场景中删除一个项 (以及它的子项)，方法是调用：delete pItem;这会自动调 文章浏览阅读6. At some point during runtime, I try to remove an item (plus its children) from the Basically RemoveItem on a QGraphicsScene object works well for me removing just about any QGraphicsItem, or QGraphicsPixmapItem etc. 9k Views 1 Watching I am populating a QGraphicsScene with instances of a custom item class (inherting QGraphicsPathItem). Interestingly, program crashes after writing "End of hideButtons ()", so there must be some method (from beyond my classes) that tries to invoke The boundingRect () function has many different purposes. cyob, wz6y, ag3jj, z3ezg, 8zx, 4fozofixf, 09a, khrw1, 7bnw, zu4cs, gjb9it, 8gd, hyf, q1z0h, ymtr, rtkp, rfk, amzzk, wk8, hicgq, r1it443, aky, stpfw, 1hinqjwh, 6yy0ak, uz4, rwy, zxq, cm21g, d7l, \