SLimenGridInventory

Overview

SLimenGridInventory is a Slate compound widget that visualizes an inventory grid. It handles drag-and-drop operations, updates the UI based on inventory changes, and manages cell highlighting during interactions.

Properties

Type	Name	Access	Description
`TWeakObjectPtr<[ULimenGridInventoryComponent](LimenGridInventoryComponent.md)>`	InventoryComponent	Private	Weak pointer to the inventory component.
`FIntVector2`	InventorySize	Private	Size of the inventory grid.
`FVector2D`	CellSize	Public	Size of each cell in the grid.
`TSubclassOf<ULimenGridCellWidget>`	CellWidget	Public	Class type for individual grid cells.
`TSharedPtr<SGridPanel>`	GridPanel	Private	Slate grid panel widget that holds the inventory cells.
`FDelegateHandle`	CellUpdateDelegateHandle	Private	Delegate handle for handling cell updates from the inventory component.
`TSet<FIntVector2>`	HighlightedCells	Private	Set of highlighted cells during drag-and-drop operations.
`TArray<TSharedPtr<SLimenGridInventoryEntry>>`	GridCellWidgets	Private	Array of Slate widgets representing individual grid cells.

Functions

Return Type	Signature	Description
`void`	Construct(const FArguments& InArgs)	Initializes the widget with arguments and sets up the inventory grid.
`void`	SetInventory(ULimenGridInventoryComponent* InInventory)	Sets the inventory component and updates the grid accordingly.
`FReply`	OnDragOver(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent)	Handles drag-over events to highlight potential drop cells.
`FReply`	OnDrop(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent)	Handles drop events to place items in the inventory grid.
`void`	OnDragLeave(const FDragDropEvent& DragDropEvent)	Clears highlighted cells when drag leaves the widget area.
`void`	InventoryCellUpdate(const TArray & Updates)	Updates the grid based on cell updates from the inventory component.
`FIntVector2`	CursorPositionToCellCoordinate(const FGeometry& MyGeometry, const FVector2D& ScreenCursorPosition) const	Converts screen cursor position to grid cell coordinates.
`TOptional<FIntVector2>`	GetRootCellCoordinates(const FGeometry& MyGeometry, const FDragDropEvent& DragDropEvent) const	Calculates the root cell coordinates for drag-and-drop operations.
`TSet<FIntVector2>`	GetPlacementCells(const FIntVector2& RootCell, const FDragDropEvent& DragDropEvent)	Determines the set of cells where an item can be placed during a drag-and-drop operation.
`void`	CreateInventoryGrid()	Creates and updates the grid based on the current inventory state.
`void`	ClearHighlightedCells()	Clears all highlighted cells in the grid.

Usage & Implementation Notes

The widget handles drag-and-drop operations to allow items to be placed in the inventory grid.
It uses a SGridPanel to layout individual grid cells.
Cell highlighting is managed during drag-and-drop events to indicate valid and invalid placement areas.
The widget updates its display based on changes from an associated ULimenGridInventoryComponent.

22 May 2026