The problem is solved now.

Thanks to Briman0094 for the help in the IRC Chat

 

[spoiler=Old post]My problem..

So.. a quick explanation what should happen is: Whenever you put a item in slot 1, the exact same item creates in slot 2 but with an enchantment and when you take the item from slot 2 the item from slot 1 disappears.

 

Seems simple to do.. but I'm having some trouble with it.

What happens now is when I take the item from slot 2, I take it up for about 1 second and also the item in slot 1 disappears but after a second i loose the item from slot 2 and the item from slot 1 pops back.

 

I hope this makes sense to some of you guys, because I really need help.

 

Some useful information

Forge build: v6.4.1.426

Minecraft version: 1.4.5

 

Container

public class CustomContainer extends Container{
private int inventorySize;
private InventoryBasic input;
private InventoryBasic output;

    public CustomContainer(InventoryPlayer inventoryPlayer){
    	input = new CustomInventory(this, "Input", 1);
    	output = new InventoryBasic("Output", 1);
    	
    	addSlotToContainer(new Slot(input, 0, 49, 47));
    	addSlotToContainer(new CustomSlot(output, 0, 107, 47));

	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));
        }
        
        inventorySize = input.getSizeInventory();
    }
    
    @Override
    public void onCraftMatrixChanged(IInventory par1iInventory){
    	super.onCraftMatrixChanged(par1iInventory);
    	if(par1iInventory == this.inventorySlots){
    		checkItem();
    	}
    }
    
    public void checkItem(){
    	ItemStack itemstack = getSlot(0).getStack();
    	if(itemstack == null){
    		output.setInventorySlotContents(0, null);
    		return;
    	}
    	itemstack = itemstack.copy();
    	ItemStack resultStack = null;
    	
    	itemstack.addEnchantment(Enchantment.protection, 5);
    	resultStack = itemstack;
    	
    	output.setInventorySlotContents(0, resultStack);
    }
    
    @Override
    public boolean canInteractWith(EntityPlayer player){
    	return true;
    }
    
    @Override
    public ItemStack transferStackInSlot(EntityPlayer player, int slot){
    	ItemStack stack = null;
    	Slot slotObject = (Slot)inventorySlots.get(slot);

	if(slotObject != null && slotObject.getHasStack()){
		ItemStack stackInSlot = slotObject.getStack();
		stack = stackInSlot.copy();

		if(slot <= inventorySize){
			if(!mergeItemStack(stackInSlot, inventorySize + 1, inventorySlots.size(), true)){
				return null;
			}
		} else if(!mergeItemStack(stackInSlot, 0, inventorySize, false)){
			return null;
		}

		if(stackInSlot.stackSize == 0){
			slotObject.putStack(null);
		} else {
			slotObject.onSlotChanged();
		}
	}
	return stack;
    }
}

 

CustomSlot:

public class CustomSlot extends Slot{

public CustomSlot(IInventory par1iInventory, int par2, int par3, int par4){
	super(par1iInventory, par2, par3, par4);
}

@Override
public boolean isItemValid(ItemStack par1ItemStack){
	return false;
}

}

 

CustomInventory:

public class CustomInventory extends InventoryBasic{
    final Container container;

    public CustomInventory(Container container, String name, int size){
        super(name, size);
        this.container = container;
    }
    
    public void onInventoryChanged(){
        super.onInventoryChanged();
        container.onCraftMatrixChanged(this);
    }
}

 

 

I really hope someone knows what I'm doing wrong.

My Guess is that It's some kind of problem with the Server / Client (Client gets updated but not server). But i'm not sure what's the problem.

 

not sure if this will help you or not as I am still learning all this myself but a couple things that stick out

In your container

 

Before:

slotObject.putStack(null);

 

After:

slotObject.putStack((ItemStack)null);

 

Before:

		} else {
			slotObject.onSlotChanged();
		}

	}
	return stack;
}

 

After:

		} else {
			slotObject.onSlotChanged();
		}

		slotObject.onPickupFromSlot(par1EntityPlayer, stackInSlot);

	}
	return stack;
}

No that's not the case, I tested it and it has nothing to do with shift clicking.

Before:

addSlotToContainer(new Slot(input, 0, 49, 47));
addSlotToContainer(new CustomSlot(output, 0, 107, 47));

 

After:

addSlotToContainer(new CustomSlot(output, 0, 107, 47));
addSlotToContainer(new Slot(input, 1, 49, 47));

 

also below should be something like this being a crafting table 2 slots one input one output

 

@Override
public ItemStack transferStackInSlot(EntityPlayer player, int slot){
    ItemStack stack = null;
        Slot slotObject = (Slot)this.inventorySlots.get(slot);

        if (slotObject != null && slotObject.getHasStack())
        {
            ItemStack stackInSlot = slotObject.getStack();
            stack = stackInSlot.copy();

            if (slot == 0)
            {
                if (!this.mergeItemStack(stackInSlot, 2, 38, true))
                {
                    return null;
                }

                slotObject.onSlotChange(stackInSlot, stack);
            }
            else if (slot >= 2 && slot < 29)
            {
                if (!this.mergeItemStack(stackInSlot, 29, 38, false))
                {
                    return null;
                }
            }
            else if (slot >= 29 && slot < 38)
            {
                if (!this.mergeItemStack(stackInSlot, 2, 29, false))
                {
                    return null;
                }
            }
            else if (!this.mergeItemStack(stackInSlot, 2, 38, false))
            {
                return null;
            }
            
            if (stackInSlot.stackSize == 0)
            {
                slotObject.putStack((ItemStack)null);
            }
            else
            {
                slotObject.onSlotChanged();
            }
            
            if (stackInSlot.stackSize == stack.stackSize)
            {
                return null;
            }

            slotObject.onPickupFromSlot(par1EntityPlayer, stackInSlot);
        }

        return stack;
}

 

just trying to be helpful 

No no no, that's not the problem. Shift clicking is working fine.

My problem is that I try to add a new itemstack to slot 2, which works perfectly but it's only visibly the itemstack is not really there, because when i try to pick it up everything resets back.

ahh ok you have 2 slots with the same slot number as to why I figured may be part of the issue both of which are set to 0 ill leave this one to someone else then

Problem solved. Topic can be closed.