Hi there

My aim was to create a single slot inventory when an item was right clicked. Im good with all the gui stuff but can seem to nail the capabilities and NBT. 

I found this post(

I also don't know using the current setup how I would go about accessing the contents of the slot from within the item class.

 

Any guidance is appreciated.

 

Code:

ItemClass:

package net.themcjavafre4k.mcdj.item.headphones;

import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.EntityEquipmentSlot;
import net.minecraft.item.ItemArmor;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ActionResult;
import net.minecraft.util.EnumActionResult;
import net.minecraft.util.EnumHand;
import net.minecraft.world.World;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;
import net.themcjavafre4k.mcdj.MCDJGuiHandler;
import net.themcjavafre4k.mcdj.MCDJMod;
import net.themcjavafre4k.mcdj.item.CustomRecord;
import net.themcjavafre4k.mcdj.item.MCDJItems;

public class ItemHeadphones extends ItemArmor{

	private String title;

	public ItemHeadphones(String name){
		super(MCDJItems.headphoneMaterial, 1, EntityEquipmentSlot.HEAD);
		this.title = name;
		setUnlocalizedName(name);
		setRegistryName(name);
		setCreativeTab(MCDJMod.creativeTab);
		INSTANCE = this;
	}

	public void registerItemModel(){
		MCDJMod.proxy.registerItemRenderer(this, 0, title, "mcdj");
	}

	@Override
	public ActionResult<ItemStack> onItemRightClick(World world, EntityPlayer player, EnumHand hand){
		ItemStack itemstack = player.getHeldItem(hand);

		if (!world.isRemote){
			player.openGui(MCDJMod.instance, MCDJGuiHandler.HEADPHONES, world, (int)player.posX, (int)player.posY, (int)player.posZ);
			//LogHelper.info("Succesfully opened GUI");
		}

		return new ActionResult<ItemStack>(EnumActionResult.PASS, player.getHeldItemMainhand());
	}

	@Override
	public ICapabilityProvider initCapabilities( ItemStack item, NBTTagCompound nbt ) {
		return new HeadphonesProvider();
	}

}

 

Provider:

package net.themcjavafre4k.mcdj.item.headphones;

import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.common.capabilities.ICapabilitySerializable;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.ItemStackHandler;

public class HeadphonesProvider implements ICapabilityProvider, ICapabilitySerializable<NBTTagCompound>{

	private ItemStackHandler inventory;

	public HeadphonesProvider() {
		inventory = new ItemStackHandler(1);
	}

	@Override
	public NBTTagCompound serializeNBT() {
		return inventory.serializeNBT();
	}

	@Override
	public void deserializeNBT( NBTTagCompound nbt ) {
		// nbt = new NBTTagCompound();
    	inventory.deserializeNBT(nbt);

	}

	@Override
	public boolean hasCapability( Capability<?> capability, EnumFacing facing ) {
		if( capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ) {
			return true;
		}
		return false;
	}

	@Override
	public <T> T getCapability( Capability<T> capability, EnumFacing facing ) {
		if( capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ) {
			return (T) inventory; 
		}
		return null;
	}
	
	
}

 

Container:

package net.themcjavafre4k.mcdj.item.headphones;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraftforge.items.IItemHandler;
import net.themcjavafre4k.mcdj.inventory.SlotInput;
import net.themcjavafre4k.mcdj.item.CustomRecord;
import net.themcjavafre4k.mcdj.item.MCDJItems;

public class ContainerHeadphones extends Container{

	public IItemHandler inv;

	public ContainerHeadphones(IItemHandler itemHandler, EntityPlayer player ) {

		this.inv = itemHandler;

		addSlotToContainer(new SlotInput(itemHandler, 0, 44, 35));

		for(int i = 0; i < 3; i++){
			for(int j = 0; j < 9; j++){
				addSlotToContainer(new Slot(player.inventory, j+i*9+9, 8+j*18, 84+i*18));
			}
		}

		for(int i = 0; i < 9; i++){
			addSlotToContainer(new Slot(player.inventory, i, 8+i*18, 142));
		}

	}

	@Override
	public boolean canInteractWith(EntityPlayer playerIn) {
		return true;
	}

	//Crashing game
	//	@Nullable
	//	@Override
	//	public ItemStack transferStackInSlot(EntityPlayer playerIn, int index)
	//    {
	//        ItemStack itemstack = ItemStack.EMPTY;
	//        Slot slot = this.inventorySlots.get(index);
	//
	//        if (slot != null && slot.getHasStack())
	//        {
	//            ItemStack itemstack1 = slot.getStack();
	//            itemstack = itemstack1.copy();
	//
	//            if (index == 2)
	//            {
	//                if (!this.mergeItemStack(itemstack1, 3, 39, true))
	//                {
	//                    return ItemStack.EMPTY;
	//                }
	//
	//                slot.onSlotChange(itemstack1, itemstack);
	//            }
	//            else if (!this.mergeItemStack(itemstack1, 3, 39, false))
	//            {
	//                return ItemStack.EMPTY;
	//            }
	//
	//            if (itemstack1.isEmpty())
	//            {
	//                slot.putStack(ItemStack.EMPTY);
	//            }
	//            else
	//            {
	//                slot.onSlotChanged();
	//            }
	//
	//            if (itemstack1.getCount() == itemstack.getCount())
	//            {
	//                return ItemStack.EMPTY;
	//            }
	//
	//            slot.onTake(playerIn, itemstack1);
	//        }
	//
	//        return itemstack;
	//    }



}

 

SlotInput:

package net.themcjavafre4k.mcdj.inventory;

import javax.annotation.Nonnull;

import net.minecraft.item.ItemStack;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;
import net.themcjavafre4k.mcdj.item.CustomRecord;
import net.themcjavafre4k.mcdj.item.MCDJItems;


public class SlotInput extends SlotItemHandler {
	public SlotInput(IItemHandler inventory, int par2, int par3, int par4) {
		super(inventory, par2, par3, par4);
	}

	@Override
	public boolean isItemValid(ItemStack itemstack) {
		return itemstack.getItem() instanceof CustomRecord;
		//return true;
	}

	@Override
	public int getSlotStackLimit() {
		return 1;
	}
	
	
}

 

Gui:

package net.themcjavafre4k.mcdj.item.headphones;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.resources.I18n;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import net.themcjavafre4k.mcdj.MCDJMod;
import net.themcjavafre4k.mcdj.SoundHandler;
import net.themcjavafre4k.mcdj.item.MCDJItems;


@SideOnly(Side.CLIENT)
public class GuiHeadphones extends GuiContainer{

	private static final ResourceLocation BG_TEXTURE = new ResourceLocation(MCDJMod.modId, "textures/gui/headphonegui.png");

	public GuiHeadphones(Container container, InventoryPlayer inventory) {
		super(container);

	}

	@Override
	public void initGui(){
		super.initGui();
	}

	@Override
	public void drawScreen(int mouseX, int mouseY, float partialTicks) {
		this.drawDefaultBackground();
		super.drawScreen(mouseX, mouseY, partialTicks);
		this.renderHoveredToolTip(mouseX, mouseY);
	}

	@Override
	protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY){
		GlStateManager.color(1, 1, 1, 1);
		mc.getTextureManager().bindTexture(BG_TEXTURE);
		int x = (width - xSize) / 2;
		int y = (height - ySize) / 2;
		drawTexturedModalRect(x, y, 0, 0, xSize, ySize);
	}

	@Override
	protected void drawGuiContainerForegroundLayer(int mousX, int mouseY){
		String name = I18n.format(MCDJItems.headphones.getUnlocalizedName());
		//fontRenderer.drawString("Search For Songs", 195, 4, 0xFFFFFF);
		fontRenderer.drawString("Headphone Player", (xSize/2 - fontRenderer.getStringWidth(name)/2), 5, 0xFFFFFF);
		//fontRenderer.drawString(invPlayer.getDisplayName().getUnformattedText(), 8, ySize/2 - 10, 0xFFFFFF);
	}


}

 If any more information is needed I will provide.

Edited March 11, 20187 yr by TheMCJavaFre4k
Solved

Have you searched the forums for similar topics? If I remember correctly there was a topic about something very similar not long ago, and I think the person posted their working code at the end.

 

EDIT- have a read of this

http://www.minecraftforge.net/forum/topic/63240-1122-checking-a-specific-container-for-items/

Edited March 11, 20187 yr by Cadiboo

1 minute ago, Cadiboo said:

Have you searched the forums for similar topics? If I remember correctly there was a topic about something very similar not long ago, and I think the person posted their working code at the end.

 The only real similar one i found was the one i referenced in the post. All others seem to be regarding tile entities with the same issues. Will have another look though.

One thing that I can see that is important is the transferStackInSlot function you say its crashing the game?

Here is my implementation of it (for a Tile entity, it might not work for an item)

@Override
	public ItemStack transferStackInSlot(EntityPlayer player, int index) {
		/*
		ITS POSSIBLE to have multi-line comments
		*/
		//WIPTech.logger.info("transferStackInSlot: "+ inventorySlots.get(index).getStack());
		ItemStack itemstack = ItemStack.EMPTY;
		Slot slot = inventorySlots.get(index);

		if (slot != null && slot.getHasStack()) {
			ItemStack itemstack1 = slot.getStack();
			itemstack = itemstack1.copy();

			int containerSlots = inventorySlots.size() - player.inventory.mainInventory.size();

			if (index < containerSlots) {
				if (!this.mergeItemStack(itemstack1, containerSlots, inventorySlots.size(), true)) {
					return ItemStack.EMPTY;
				}
			} else if (!this.mergeItemStack(itemstack1, 0, containerSlots, false)) {
				return ItemStack.EMPTY;
			}

			if (itemstack1.getCount() == 0) {
				slot.putStack(ItemStack.EMPTY);
			} else {
				slot.onSlotChanged();
			}

			if (itemstack1.getCount() == itemstack.getCount()) {
				return ItemStack.EMPTY;
			}

			slot.onTake(player, itemstack1);
		}

		return itemstack;
	}

 

What's the capability for?

Just now, TyrellPlayz said:

What's the capability for?

Capabilities in general or in this specific context?

1 minute ago, Cadiboo said:

Capabilities in general or in this specific context?

In this context

Edited March 11, 20187 yr by TyrellPlayz

Here's my code. Link

The item in question in it is ItemWallet. That has a container

2 hours ago, TyrellPlayz said:

Here's my code. Link

The item in question in it is ItemWallet. That has a container

Thanks so much for sharing that. I added the INBTInventory implementation to handle the NBT tags and everything is working perfectly now.

Couldn't thank you enough!

@TheMCJavaFre4k I was wondering if you could link/post your code, so that I can see the changes you made