Implement scrollable surfaces for items

[dimitar-asenov]

Currently, all children of an item are always rendered and they are visible in their entirety.

In some cases (e.g. the output console in ConsoleOverlay) we need a way to only show a subset of the children - a way to scroll the contents.

[lukedirtwalker]

So for this I would suggest to use a QGraphicsView add it to the scene and inside the QGraphicsView show a scene which contains everything that has to scrollable.

Check also Mailing list discussion

What do you think?

[dimitar-asenov]

Hmm, this actually feels like a super heavy approach. I was thinking more along the lines of having a normal item that has the QGraphicsItem::ItemClipsChildrenToShape flag set: http://doc.qt.io/qt-5/qgraphicsitem.html#GraphicsItemFlag-enum