QGraphicsView-如何禁用鼠标和键盘滚动-QGraphicsView-howtodisablemouseandkeyboardscrolling

I believe the easiest solution would be to set FocusPolicy of QGraphicsView to NoFocus and then process all key events in main window.

我相信最简单的解决方案是将QGraphicsView的FocusPolicy设置为NoFocus,然后处理主窗口中的所有关键事件。

ui->graphicsView->setFocusPolicy( Qt::NoFocus );

I think the easy way is to use QGraphicsView::setSceneRect() to set the area that the view is allowed to visualize.

我认为简单的方法是使用QGraphicsView :: setSceneRect()来设置允许视图可视化的区域。

If you set the view's sceneRect() to the actual size of the view widget (or just slightly smaller), then it won't be able to scroll or pan outside of this rectangle.

如果将视图的sceneRect()设置为视图窗口小部件的实际大小(或稍微小一点),则它将无法在此矩形外滚动或平移。

I don't know if there's an easier way, but the moderately easy way would be to make a class that inherits your QGraphicsView class, and overrides the mouse and key press events.

我不知道是否有一种更简单的方法,但简单方便的方法是创建一个继承QGraphicsView类的类,并覆盖鼠标和按键事件。

The harder way would involve installing an event filter on the widget.

更难的方法是在小部件上安装事件过滤器。

In my opinion, the hardest brute-force solution would be to detect the change through some sort of signal, and set it back to how it was.

在我看来,最难的蛮力解决方案是通过某种信号检测变化,并将其设置回原样。