QGraphicsScene and QGraphicsLineItem Problem

[katana]

Hey Everyone,

I've followed the Tutorial (link below) of QGraphicsScene and everything works fine.
http://doc.qt.io/qt-5/qtwidgets-graphicsview-diagramscene-example.html

Now I've drawn several lines on the scene. When I select one of them, how can I trace back the draw information. I mean the positions of two points. What I wanna do is, when I select the line, I can change its orientation or length with mouse click.

Thanks in advance
Best Regards

[Asperamanca]

First, when the item is selected, you can use
qgraphicsitem_cast<QGraphicsLineItem*>(pItem)
to determine it's actually a line item. With that line item, you can now access and modify the line() property.