如何在QGraphicsItem上设置不透明度

Question

i have a inherited from QGraphicsScene and QGraphicsItem to create my own classes. I use Qt 4.6.

I want to set a specific opacity on each items of my scene. I use setOpacity : setOpacity method, but its not the result i hope. I want to have for example one item opaque and an other transparent (to see the desktop, or the other application).

But if i dont set the opacity of the QGraphicsView to 0.5, i have not the transparancy. And if the QGraphicsView is set to 0.5, the item is not real opaque.

What should i do ?

Thanks you.

Answer 1

setOpacity方法是透明的，但仅对图形场景的背景透明，而不对小部件透明，如果要查看桌面，则需要设置小部件（对话框，主窗口等）的不透明性。