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Overview

UMI provides a comprehensive sorting system with 8 sort methods.

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Sort Types

enum class EInventorySortType : uint8
{
    Name,          // Alphabetical by display name
    Rarity,        // By rarity tier (Common → Legendary)
    Quantity,      // By stack size
    Weight,        // By individual item weight
    Category,      // By gameplay tag category
    Value,         // By item value (price)
    Durability     // By current durability
};

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Sort Order

enum class ESortOrder : uint8
{
    Ascending,     // A→Z, Low→High, Common→Legendary
    Descending     // Z→A, High→Low, Legendary→Common
};

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Sorting Items

Blueprint: 
[InventoryComponent] → SortInventory
   Sort Type: Rarity
   Sort Order: Descending
C++: 
InventoryComponent->SortInventory(
    EInventorySortType::Rarity,
    ESortOrder::Descending
);

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Auto-Sort on Add

Enable automatic sorting whenever items are added: 
Auto Sort On Add: true
Default Sort Type: Name
Default Sort Order: Ascending
C++: 
InventoryComponent->bAutoSortOnAdd = true;
InventoryComponent->DefaultSortType = EInventorySortType::Name;
InventoryComponent->DefaultSortOrder = ESortOrder::Ascending;

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Compact Empty Slots

Move all items to the front, removing gaps: Blueprint: 
[InventoryComponent] → CompactInventory
C++: 
InventoryComponent->CompactInventory();
Result: 
Before:
[Sword] [ ] [Potion] [ ] [ ] [Ore]

After:
[Sword] [Potion] [Ore] [ ] [ ] [ ]

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Sort Examples

By Name (Ascending) 
Axe, Bread, Health Potion, Iron Ore, Sword
By Rarity (Descending) 
Legendary Blade, Epic Armor, Rare Ring, Uncommon Potion, Common Bread
By Quantity (Descending) 
Wood x50, Stone x35, Iron Ore x20, Sword x1
By Value (Descending) 
Diamond ($1000), Gold Bar ($500), Silver Ring ($100), Bread ($5)

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Custom Sort Logic

Override sorting in Blueprint for custom behavior: 
Event Custom Sort Compare
   Item A: [Input]
   Item B: [Input]
   ↓
   [Your custom comparison logic]
   ↓
   Return: -1 (A before B), 0 (equal), 1 (B before A)