Getting Mouse Position During Drag and Drop UMG

[aussieburger]

@Everynone

You’ll have two options here:

• the actors have a fully transparent widget attached (updating its screen location during drag&drop - so you’ll end up dropping a widget on a 3d object’s widget; you will not even need a trace here)
• a fully transparent widget covering the entire screen (or at least the gameplay area), like a border with Tint alpha set to 0 (here you’ll need to trace)

You only need to worry about it while dragging so it can be added/removed (or collapsed) to/from the viewport when dragging starts/ends.

Not sure if any other method exists.

Thanks for posting this workaround! Previously in 4.19 this was not required for drag and dropping out of a scrollbar button widget the touch positions where still passed through to the viewport. I guess Epic ‘fixed’ this behavior as it no longer worked in 4.20. Using your second workaround option I was however able to get drag and dropping from a scroll list item to the viewport working in 4.20 again