[UMG] Drag and Drop Inventory?

Thanks for the tipp with the Canvas, is there a way to set the min size of the Border to 100x100? It only “stretches” when it has a child.

But that aside, i tested the HUD with the widget reflector and it marks the Viewport. So not another widget but just the whole viewport. I just set my input to “Game and UI” and gave it the Inventory as a focus. Also enabled my mouse with the Controller Bool. Am i missing something? I’m working a few hours on this now. Could be that i missed something stupidly easy.

This is what i meant with visible. I have my roots set straight to visible.
And i also have the childs at visible.

EDIT: The main Inventory, that has the Grid as a child (and the grid as the Slots and Items as a child) is set to hittest. Do i need to set this main inventory to Visible too?

EDIT2: Ok i got it to work somehow. This is my setup so far (just for the fact to recreate this):

My Inventory, so the top most Widget that has a Grid Widget:

Root - Visible
CanvasPanel - Visible
UniformGridPanel - SelfHitTest

The Inventory Slot, that is a Child of the UniformGridPanel:

Root - Visible
Overlay - Visible
Image - Visible

The ItemWidget, which is a Child of the Overlay of the InventorySlot:

Root - Visible
Overlay - Visible
Image - Visible

If there is anything to “improve”, please let me know, otherwise i’m very happy that you spend your time helping me here. I though i would never get this to work.