How would I go about adding lore to an ItemStack?

Here is my current code:

CompoundNBT nbt = item.getTag();
CompoundNBT display;
ListNBT lore;
if (nbt.get("display") != null) {
    display = (CompoundNBT) nbt.get("display");
    if (display.get("Lore") != null) {
        lore = (ListNBT) display.get("Lore");
    } else {
        lore = new ListNBT();
    }
} else {
    lore = new ListNBT();
    display = new CompoundNBT();
}
CompoundNBT tagRawJson = new CompoundNBT();
tagRawJson.putString("tag", "{'text': '[tag]', 'italic': false, 'color': 'white'}".replace("[tag]", tag));
lore.add(tagRawJson.get("tag"));
display.put("Lore", lore);
nbt.put("display", display);
item.setTag(nbt);

I would like to add the contents of the String variable named tag to the lore.

Edited January 10, 20214 yr by DoctorC

Item#addInformation if you own the item or RenderTooltipEvent if its not. I'm assuming that this is present on the ItemStack itself.

19 minutes ago, ChampionAsh5357 said:

Item#addInformation if you own the item or RenderTooltipEvent if its not. I'm assuming that this is present on the ItemStack itself.

I want to add it on the Itemstack, not the item (I've tried Item.addInformation), but I'll look into RenderTooltipEvent.

Thanks!

25 minutes ago, DoctorC said:

I want to add it on the Itemstack, not the item (I've tried Item.addInformation), but I'll look into RenderTooltipEvent.

Thanks!

ItemStacks are Stacks of an Item.

addInformation in the ItemClass is passed the relevant ItemStack for you to make any determinations based on other data. But only works for your own items.

RenderTooltipEvent would be if you need to add information to an Item you don't control (and gets the same parameters addInformation does).

Edited January 10, 20214 yr by Draco18s

33 minutes ago, Draco18s said:

addInformation in the ItemClass is passed the relevant ItemStack for you to make any determinations based on other data. But only works for your own items.

I'm using GuiScreenEvent.KeyboardKeyPressedEvent to get a keybind being pressed, and then change the item under cursor, so I don't think Item#addInformation would work (well I can't get it to at least).

Edited January 10, 20214 yr by DoctorC

2 hours ago, ChampionAsh5357 said:

RenderTooltipEvent

Okay, how do I change the tooltip rendered?

It gives you the coordinate.... you need to render the extra information yourself.

Edited January 11, 20214 yr by poopoodice

12 minutes ago, poopoodice said:

It gives you the coordinate.... you need to render the extra information yourself.

Yes, but how.

As in, I have a FontRenderer and I can render in a string, but it doesn't add lore, rather it adds text rendered underneath the item.

I don't have any experience rendering things in Forge, which is why I am asking.

If you just want to add some simple text to the item use ItemTooltipEvent.

Edited January 11, 20214 yr by poopoodice

2 minutes ago, poopoodice said:

If you just want to add some simple text to the item use ItemTooltipEvent.

There don't seem to be any functions to change the tooltip.

There's a list of tooltips provided, you can do whatever you want to it (remove them all, add your custom ones, or even flip them all around...).

4 minutes ago, poopoodice said:

There's a list of tooltips provided, you can do whatever you want to it (remove them all, add your custom ones, or even flip them all around...).

Thanks!
I didn't realise that adding to the list would update it in-game without having to set it.