[1.12.2] Interacting with an item while in inventory

[ProspectPyxis]

I'm trying to make an item change its mode by shift-right clicking while hovering over the item in an inventory screen. How would I do this? I don't see any methods in the Item class that would do something like this.

[ProspectPyxis]

Just an NBT change so that the item knows what "mode" it's in and behave accordingly.

[ProspectPyxis]

I'm gonna have to look into all those methods, but one more thing you're missing: I only want to change the mode when shift-right clicking the item, not just when hovering while holding shift. Since a right click constitutes removing the item from the inventory temporarily, I assume this will be a bit more difficult?
If it gets too impractical to implement, I can simply use a keybind while holding the item for this, but I wanna see what I can do first.

Edited March 27, 2019 by ProspectPyxis

[ProspectPyxis]

Hm, I suppose I'll go with the keybind route, then. Thanks for the help anyways!