Graphics View not updating

[Lionel]

I am facing a problem with a graphicsLineItem in a graphicsView. The lineItem is activated by a selection made on a tabWidget. The issue is that the lineItem is not highlighting when the appropriate item on the tabWidget is clicked, rather it highlights when the mouse hovers over the graphicsView.

I feel its cause the graphicsView is not refreshing, but use of update with sceneRect() as parameter is not solving te problem.

Need some suggestions and solutions for the same.

[ChrisW67]

We need a small, self-contained example of what you are doing that is not working. There is no auto-magical connection between "a selection made on a tabWidget" (whatever that means) and the selection state of a QGraphicsItem.