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WBP_FDM_SlotContainerDirectionGroup is just a layout helper widget used by WBP_FDM_Widget to organize and arrange multiple Slot Containers within a single direction. Each Direction Group represents one direction (Up, Down, Left, or Right) and acts as a visual container that holds one or more WBP_FDM_SlotContainer widgets. TL;DR: You do NOT need to touch this widget.

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Purpose

Slot Containers must be arranged in a strict order (side-by-side or top-to-bottom) depending on their direction. To achieve this, each direction group internally uses a layout panel:
  • Horizontal Box for Left / Right directions
  • Vertical Box for Up / Down directions
However, standard layout panels always insert children in the same logical direction:
  • Horizontal Box: left to right
  • Vertical Box: top to bottom
For some directions (specifically Left and Down), this default ordering is visually inverted relative to the desired menu layout.

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Directional Layout Inversion

To ensure correct visual ordering:
  • The Left direction group draws its containers in reverse horizontal order.
  • The Down direction group draws its containers in reverse vertical order.
This inversion ensures that containers visually expand outward from the central D-Pad reference, regardless of the underlying layout panel behavior.

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Responsibilities

WBP_FDM_SlotContainerDirectionGroup is responsible for:
  • Hosting WBP_FDM_SlotContainer widgets for a specific direction
  • Inserting containers into the correct layout panel (horizontal or vertical)
  • Reversing insertion order when necessary (Left and Down)
  • Maintaining consistent spacing and alignment per direction
It does not contain selection logic, gameplay logic, or slot-level behavior.