Saving data w/ items [Solved]

Lua · August 17, 2013

Okay Im trying to save the items in container item based gui. This is what ive got so far but I cant seem to get it to work:

ItemBagpackInventory(Ive written some comments on some bits which I think is the problem

package simplecamping;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;

public class ItemBagpackInventory implements IInventory
{

private ItemStack[] inv;
private ItemStack bagpack;

public ItemBagpackInventory(ItemStack itemstack)
{
	inv = new ItemStack[27];
	bagpack = itemstack;
}

@Override
public int getSizeInventory()
{
	return inv.length;
}

@Override
public ItemStack getStackInSlot(int slot)
{
	return inv[slot];
}

@Override
public ItemStack decrStackSize(int slot, int amt)
{
	ItemStack stack = getStackInSlot(slot);
	if(stack != null)
	{
		if(stack.stackSize <= amt)
		{
			setInventorySlotContents(slot, null);
		}
		else
		{
			stack = stack.splitStack(amt);
			if(stack.stackSize == 0)
			{
				setInventorySlotContents(slot, null);
			}
		}
	}
	return stack;
}

@Override
public ItemStack getStackInSlotOnClosing(int slot)
{
	ItemStack stack = getStackInSlot(slot);
	if(stack != null)
	{
		setInventorySlotContents(slot, null);
	}
	return stack;
}

@Override
public void setInventorySlotContents(int slot, ItemStack stack)
{
	inv[slot] = stack;
	if(stack != null && stack.stackSize > getInventoryStackLimit())
	{
		stack.stackSize = getInventoryStackLimit();
	}
}

@Override
public String getInvName()
{
	return "Bagpack";
}

@Override
public boolean isInvNameLocalized()
{
	return false;
}

@Override
public int getInventoryStackLimit()
{
	return 64;
}

@Override
public void onInventoryChanged()
{}

@Override
public boolean isUseableByPlayer(EntityPlayer entityplayer)
{
	return true;
}

public NBTTagCompound writeToNBT(NBTTagCompound tagCompound)
{
	NBTTagList itemList = new NBTTagList();
	for(int i = 0; i < inv.length; i++)
	{
		ItemStack stack = inv[i];
		if(stack != null)
		{
			NBTTagCompound tag = new NBTTagCompound();
			tag.setByte("Slot", (byte) i);
			stack.writeToNBT(tag);
			itemList.appendTag(tag);
		}
	}
	tagCompound.setTag("Inventory", itemList);
	return tagCompound;
}

public void readFromNBT(NBTTagCompound tagCompound)
{
	NBTTagList tagList = tagCompound.getTagList("Inventory");

	for(int i = 0; i < tagList.tagCount(); i++)
	{
		NBTTagCompound tag = (NBTTagCompound) tagList.tagAt(i);
		byte slot = tag.getByte("Slot");
		System.out.println(i);

		if(slot >= 0 && slot < inv.length)
		{
			inv[slot] = ItemStack.loadItemStackFromNBT(tag);
			System.out.println("slot");
		}
	}
}

@Override
public boolean isItemValidForSlot(int i, ItemStack itemstack)
{
	return true;
}

@Override
public void openChest()
{
	if(bagpack.hasTagCompound())
	{
		System.out.println("hastag");//never gets printed
		readFromNBT(bagpack.getTagCompound());
	}
}

@Override
public void closeChest()
{
	if(! bagpack.hasTagCompound())
	{

		System.out.println("writing without tag compound"); //Prints all the time, even after its set and it should be false
		bagpack.setTagCompound(new NBTTagCompound());
	}

	NBTTagCompound tag = bagpack.getTagCompound();
	writeToNBT(tag);

}

}

Container Bagpack:

package simplecamping;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;

public class ContainerBagpack extends Container
{

private ItemBagpackInventory bginv;

public ContainerBagpack(InventoryPlayer inventoryPlayer, ItemBagpackInventory bagpack)
{
	bginv = bagpack;
	bagpack.openChest();

	for(int i = 0; i < 3; i++)
	{
		for(int j = 0; j < 9; j++)
		{
			addSlotToContainer(new Slot(bginv, j + i * 3, 8 + j * 18, 17 + i * 18));
		}
	}

	bindPlayerInventory(inventoryPlayer);
}

@Override
public boolean canInteractWith(EntityPlayer player)
{
	return bginv.isUseableByPlayer(player);
}

protected void bindPlayerInventory(InventoryPlayer inventoryPlayer)
{
	for(int i = 0; i < 3; i++)
	{
		for(int j = 0; j < 9; j++)
		{
			addSlotToContainer(new Slot(inventoryPlayer, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
		}
	}

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

public void onContainerClosed(EntityPlayer par1EntityPlayer)
{
	super.onContainerClosed(par1EntityPlayer);
	this.bginv.closeChest();
}
}

GuBagpack:

package simplecamping;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.resources.I18n;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.util.ResourceLocation;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.FMLClientHandler;

public class GuiBagpack extends GuiContainer
{
    public ItemBagpackInventory bagpack;

    public GuiBagpack(InventoryPlayer par1InventoryPlayer, ItemBagpackInventory bgInv)
    {
        super(new ContainerBagpack(par1InventoryPlayer, bgInv));
        this.bagpack = bgInv;
    }

    /**
     * Draw the foreground layer for the GuiContainer (everything in front of the items)
     */
    protected void drawGuiContainerForegroundLayer(int par1, int par2)
    {
        String s = this.bagpack.isInvNameLocalized() ? this.bagpack.getInvName() : I18n.func_135053_a(this.bagpack.getInvName());
        this.fontRenderer.drawString(s,  8, 6, 4210752);
        this.fontRenderer.drawString(I18n.func_135053_a("container.inventory"), 8, this.ySize - 96 + 2, 4210752);
    }

    /**
     * Draw the background layer for the GuiContainer (everything behind the items)
     */
    protected void drawGuiContainerBackgroundLayer(float par1, int par2, int par3)
    {
        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
	FMLClientHandler.instance().getClient().renderEngine.func_110577_a(new ResourceLocation(Strings.MOD_ID, "/textures/gui/bagpack.png"));
        int k = this.guiLeft;
	int l = this.guiTop;
	this.drawTexturedModalRect(k, l, 0, 0, 256, 256);
    }
}

GuiHandler:

package simplecamping;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;
import cpw.mods.fml.common.network.IGuiHandler;

public class GuiHandler implements IGuiHandler
{
@Override
public Object getServerGuiElement(int id, EntityPlayer player, World world, int x, int y, int z)
{
	TileEntity tile_entity = world.getBlockTileEntity(x, y, z);
	ItemBagpackInventory bp = new ItemBagpackInventory(player.inventory.getCurrentItem());

	switch(id)
	{
	case 0:
		return new ContainerCampfire(player.inventory, (TileEntityCampfire) tile_entity);
	case 1: 
		return new ContainerBagpack(player.inventory, (ItemBagpackInventory) bp);
	}
	return true;
}

@Override
public Object getClientGuiElement(int id, EntityPlayer player, World world, int x, int y, int z)
{		
	TileEntity tile_entity = world.getBlockTileEntity(x, y, z);
	ItemBagpackInventory bp = new ItemBagpackInventory(player.inventory.getCurrentItem());//is not 100% the backpack

	switch(id)
	{
	case 0:
		return new GuiCampfire(player.inventory, (TileEntityCampfire) tile_entity);
	case 1:
		return new GuiBagpack(player.inventory, (ItemBagpackInventory) bp);
	}
	return true;
}
}

Lua · August 18, 2013

Anyone?

Guff · August 18, 2013

You can't use an item like you would a tile entity (which is what you're doing as you've implemented IInventory) since items are static. Everything will need to be written to the ItemStack's NBTTagCompound.

Lua · August 18, 2013

Can I have an example?

GotoLink · August 18, 2013

@Guff

It doesn't matter where you implement IInventory. TileEntity is only one of the possible implementation.

@Lua

You only need to call

writeToNBT(stack.getTagCompound());//To save

readFromNBT(stack.getTagCompound());//To load

Lua · August 18, 2013

In the open and close chest methods? (They get called when opening and closing the container btw)

Lua · August 18, 2013

@GotoLink Okay this is what i tried and it didnt work:

@Override
public void openChest()
{
	NBTTagCompound compound = new NBTTagCompound();
	ItemStack stack = ItemStack.loadItemStackFromNBT(compound);
	if(bagpack.hasTagCompound())
	{
		System.out.println("hastag");//never gets printed
		//readFromNBT(bagpack.getTagCompound());
		readFromNBT(stack.getTagCompound());
	}
}

@Override
public void closeChest()
{
	NBTTagCompound compound = new NBTTagCompound();
	ItemStack stack = ItemStack.loadItemStackFromNBT(compound);
		System.out.println("writing without tag compound"); //Prints all the time, even after its set and it should be false
		//bagpack.setTagCompound(new NBTTagCompound());
		if(stack != null)
		{
		writeToNBT(stack.getTagCompound());
		}
}

GotoLink · August 18, 2013

No, those methods don't give you the ItemStack as a variable.

Use your code inside a method which gives you the player or item in your container class or item.

If necessary, send packets from your gui.

Lua · August 18, 2013

I have no idea, I know most people dont work like this, but can some one just give me the code? Ive tried to do myself but no avail

GotoLink · August 18, 2013

I stand corrected, I didn't read all of your code. This should work :

@Override
public void openChest()
{
		if(bagpack.hasTagCompound())
	 {
  			readFromNBT(bagpack.getTagCompound());//Bag pack has some info for the inventory
	 }
                else
                {
                        bagpack.setTagCompound(writeToNBT(new NBTTagCompound()));//this is a "new" bagpack
                }
}

@Override
public void closeChest()
{
	if(! bagpack.hasTagCompound())
	 {
                        //Should never be reached, since done when opening the first time
		 bagpack.setTagCompound(writeToNBT(new NBTTagCompound()));
	}
                else
                {//We made changes to the inventory, save them
	        bagpack.setTagCompound(writeToNBT(bagpack.getTagCompound()));
                }

}

Lua · August 18, 2013

Nope :C

Lua · August 18, 2013

bump :c

GotoLink · August 18, 2013

"Nope" what ?

Any comments on my code ?

Lua · August 18, 2013

As in, it didnt work, Im not sure why too

Lua · August 19, 2013

I give up.

hydroflame · August 19, 2013

daaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaamn

Lua · August 19, 2013

daaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaamn

wut

hydroflame · August 19, 2013

I give up.

this, its someting simple but you "give up" ... oh well one less mod on the market...

Lua · August 19, 2013

I give up.

this, its someting simple but you "give up" ... oh well one less mod on the market...

I couldnt figure out what was wrong w/ my saving code and neither could anyone else it seemed

hydroflame · August 19, 2013

well what you are trying to do is obviously possible, did you even debug at all?? try to check where it was saving/not saving

System.out.println("text");

System.out.println("the value of derp is: "+derp);

or even

try{

throw new Exception("weird thing happenning here !");

}catch(Exception e{

e.printStackTrace();

}

if you really need ?

i dont knwo just by looking at it whats wrong, but i know what you are trying to do is not impossible

Lua · August 19, 2013

Yes I have

@Override
public void openChest()
{
	if(bagpack.hasTagCompound())
	{
		System.out.println("hastag");//never gets printed
		readFromNBT(bagpack.getTagCompound());
	}
}

@Override
public void closeChest()
{
	if(! bagpack.hasTagCompound())
	{

		System.out.println("writing without tag compound"); //Prints all the time, even after its set and it should be false
		bagpack.setTagCompound(new NBTTagCompound());
	}

	NBTTagCompound tag = bagpack.getTagCompound();
	writeToNBT(tag);

}

It seems that the tag never gets properly because it always seems to get set everytime and always goes through the if statement. But the hasCompound never gets printed

hydroflame · August 19, 2013

public void openChest()
{
	if(bagpack.hasTagCompound())
	{
		System.out.println("hastag");//never gets printed
		readFromNBT(bagpack.getTagCompound());
	}
}

well this code alone will not make bagpack magicly have a tagCompount

you should have a else then set a new tag compound like gotolink said in his post

public void openChest()
{
	if(bagpack.hasTagCompound())
	{
		System.out.println("hastag");//never gets printed
		readFromNBT(bagpack.getTagCompound());
	}else{
                    bagpack.stackTagCompound = new NBTTagCompound();//im assuming that bagpack is an instance of ItemStack .. ?? ?
                }
}

Lua · August 19, 2013

Okay, after some more testing, it seems that it writes to nbt when opened to according to the console. And its trying to read the nbt but it looks like nothing is there. Also yeah bagpack is an instance of itemstack

hydroflame · August 19, 2013

after setting the new nbt, did you write anythign to it? because if not thats kindof normal

public class vec3{
public float x = 0, y = 0, z = 0;
}


in program:
vec3 = new vec3();
println(vec3.x);

"oh its 0 :\"
"yeah thats normal"

or are you legitimatelly writing to it and its not apparing

Lua · August 19, 2013

Yes I put some itemstacks in it and closed it

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Saving data w/ items [Solved]

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