Demo5 Containers

Examples/Demo5 Containers/Containers Demo.unity

This is an example of inventory-items that contain their own nested item set.

What The Demo Shows

Data:

Bindings and UI:

Opening a container:

ContainerItemInstance is stored in the player inventory.
The context menu calls OpenContainerMenuEntrySO.
Through Events.OnOpenClick, the selected container is passed to ContainerUIController.
The controller sets the active container.
ContainerInventoryDataBinding rebuilds inventory size and loads container contents.

Moving items:

Regular drag/drop operations work between player inventory and container inventory.
Bindings synchronize transfer into the player list or ContainerItemInstance.Items.
If an item is dropped onto a slot that contains a container, IPreRuleOccupiedSlotDropHandler intercepts that attempt before regular drop rules.
The binding checks that the container has capacity and that the move would not place a container into itself or one of its children.
If the check passes, ContainerViewRegistry.InsertIntoContainer(...) puts the item inside the container and returns OccupiedSlotDropResult.Handled.
If the check fails, the handler returns Rejected, and the item stays in its original place.

an item must contain a nested inventory
you need a context menu for item operations
dropping onto an already occupied slot should mean a separate action, such as "put this inside the container"