Event to insert item to custom capability of another item with mouse

[xand3s]

Hello, basically I have an item that stores custom capability and I want to make it such that if I pick up an ItemStack with my mouse (in inventory screen) I can drop it off on another item and it will go to it's inventory (like Quark's functionality of inserting items into shulker boxes).

I wonder if there is a smart way of approaching this, maybe making a custom event or maybe there is such an event already (I've looked through events but coulnd't find one with the context of player's inventory)?

I'm quite new to modding and I was looking into Quark's source code to see how it's been done but couldn't find it.

[ChampionAsh5357]

I would suggest looking into how `BundleItem` does it since I imagine the behavior is exactly the same.

[xand3s]

Okay, I'll look into it, thanks for the suggestion