PhantomSlotWidget

The PhantomSlotWidget is a UI widget representing a "phantom" item slot, commonly used for ghost ingredient inputs in recipe configurations. Unlike regular slots, it does not interact with real inventories but allows setting, modifying, and clearing items for visual or configurational purposes.

Features

• Does not allow item taking or putting from real inventories.
• Supports setting items via UI clicks or API calls.
• Allows right-click clearing (clearSlotOnRightClick).
• Supports integration with JEI/EMI for ghost ingredient handling.

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Basic Properties

Field	Description
maxStackSize	Maximum allowed stack size in this phantom slot.
clearSlotOnRightClick	Whether right-clicking clears the slot.

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APIs

It owns all APIs from SlotWidget, and you can get or set item by its APIs.

setClearSlotOnRightClick

Configures whether right-clicking on the slot clears its contents.

Java / KubeJS

phantomSlot.setClearSlotOnRightClick(true);

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setMaxStackSize

Sets the maximum allowed stack size in the phantom slot.

Java / KubeJS

phantomSlot.setMaxStackSize(64);

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Mouse Interactions

Phantom slots handle different types of mouse interactions:

Mouse Action	Effect
Left-click on empty slot with an item	Sets the item to the slot
Left-click on filled slot with an item	Replaces the item in the slot
Right-click on filled slot	Decreases stack size
Shift + Click	Adjusts stack size dynamically
Right-click on empty slot	Clears the slot (if clearSlotOnRightClick is enabled)