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[1.11 - Solved] Changing an ItemStack's display name using NBT


Franckyi
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Hi !

I'm creating a small GUI mod to edit some item stats, like it's name, lore, enchantments etc...

The GUI opens if the player has an item in his main hand.

But now I'm in trouble with using the NBT system to change an ItemStack's name.

After pressing a "Done" button, in the

actionPerformed(GuiButton button)

, this is what I did :

 

if (button == this.doneButton) { // If it's the correct button
if(itemStack.getTagCompound() == null) // If the itemstack doesn't have a TagCompound...
	itemStack.setTagCompound(new NBTTagCompound()); // ...I'll create an empty one
[color=red]itemStack.getTagCompound().getCompoundTag("tag").getCompoundTag("display").setString("Name", name.getText()); // This is where I'm wrong ('name' is the GuiTextField I'm using)[/color]
Minecraft.getMinecraft().thePlayer.openGui(ItemEditorMod.instance, ItemEditorGuiHandler.ITEM_EDITOR_MENU, Minecraft.getMinecraft().theWorld, // This is the method to go to the previous GuiScreen
(int) Minecraft.getMinecraft().thePlayer.posX, (int) Minecraft.getMinecraft().thePlayer.posY,
(int) Minecraft.getMinecraft().thePlayer.posZ);
} 

 

When I check the NBT tag of the selected item using NBTExplorer, no new compound appears. Can someone help me ?

 

 

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When I check the NBT tag of the selected item using NBTExplorer, no new compound appears. Can someone help me ?

 

This is because you've edited the client-side object, and as soon as you open the player's inventory again, the server's version overwrites your changes.  You need to send a packet to the server and make the change there.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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First of all, you cannot change things like this on the client. You will have to send a packet to the server and change the stack there. Moreover you cannot use

getCompoundTag

like that, since if the tag does not exist it will return a new tag, but that new tag will not be stored automatically.

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Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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Ok, so my Network setup is working. Thanks to Draco18s for his link and diesieben07 for his tutorial (http://www.minecraftforge.net/forum/index.php?topic=20135.0). This is in my Message Handler class :

@Override
public IMessage onMessage(final EditItemMessage message, final MessageContext ctx) {
IThreadListener mainThread = (WorldServer) ctx.getServerHandler().playerEntity.worldObj;
        mainThread.addScheduledTask(new Runnable() {
                @Override
                public void run() {
                	System.out.println("New Name : " + message.text);
                	// Help
                }
        });
        return null;
}

I know I can get the ItemStack I want by using

ctx.getServerHandler().playerEntity.getHeldItemMainhand()

, but then I don't know what to do. I just want to change the ItemStack's name using NBT.

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Well, didn't you say that it wasn't good ? Because if I do the same same thing...

if(ctx.getServerHandler().playerEntity.getHeldItemMainhand().getTagCompound() == null) ctx.getServerHandler().playerEntity.getHeldItemMainhand().setTagCompound(new NBTTagCompound());
ctx.getServerHandler().playerEntity.getHeldItemMainhand().getTagCompound().getCompoundTag("tag").getCompoundTag("display").setString("Name", message.text);

...I'm getting the same object with an empty "tag" Tag Compound.

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ItemStack#getOrCreateSubCompound

has the SRG name

func_190925_c

, so that's probably the method name you'll need to use.

 

I suggest you update your MCP mappings so this is deobfuscated for you.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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