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[1.7.10] Detecting when player swaps held item


PegBeard
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I have a feeling this is a really simple thing to do and probably a dumb question, but I have been searching for a while and not really found what I am looking for.

 

What I want to do is, detect when the player selects an item (scrolls to it, or presses the hotbar number). I have attempted to check the player's currently equipped item and compare it to the previously equipped item (as in the last held item), but I couldn't find a method for previously equipped items.

 

I did attempt a LivingUpdateEvent, to check and store the held item, but it didn't seem like the most practical way to do it, so I was wondering if anyone could advise me on a better way to detect when the player changes their held item.

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Comparing current to previous is the only option. Any other way would require either ASM or quite some replacements to vanilla inventory system.

 

As to storin previous values:

You need to implements IExtendedEntityProperties, use PlayerTickEvent (note: pick one event.phase, otherwise event is ran twice), make comprasion to previous stack and then refresh.

 

You will probably have to save two fields:

player.inventory.currentItem to check if "wheel" slot is same as before. - if it changed from prev pick, item changed.

player.inventory.getCurrentItem() compare if previous ItemStack is same as new one (from current tick).

 

I fortog you can just "==", no need to save currentItem.

 

Links:

IEEP tutorial:

http://www.minecraftforum.net/forums/mapping-and-modding/mapping-and-modding-tutorials/1571567-1-7-2-1-6-4-eventhandler-and

1.7.10 is no longer supported by forge, you are on your own.

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