Hello, I was wondering how I would add inventory slot tooltips.

 

My Container code:

package mrkirby153.MscHouses.block.Container;

import mrkirby153.MscHouses.block.TileEntity.TileEntityBlockBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

public class ContainerBlockBase extends Container{
public ContainerBlockBase(InventoryPlayer inventoryPlayer, TileEntityBlockBase block_base) {

	// Add the Moduel slot to the base
        this.addSlotToContainer(new Slot(block_base, 0, 81, 18));

        // Add the fuel slot to the Block Base
        this.addSlotToContainer(new Slot(block_base, 1, 81, 64));
        
        //Add the material modifyer to the block base
        this.addSlotToContainer(new Slot(block_base, 2, 81, 39));


	// Add the player's inventory slots to the container
        for (int inventoryRowIndex = 0; inventoryRowIndex < 3; ++inventoryRowIndex) {
            for (int inventoryColumnIndex = 0; inventoryColumnIndex < 9; ++inventoryColumnIndex) {
                this.addSlotToContainer(new Slot(inventoryPlayer, inventoryColumnIndex + inventoryRowIndex * 9 + 9, 8 + inventoryColumnIndex * 18, 94 + inventoryRowIndex * 18));
            }
        }

        // Add the player's action bar slots to the container
        for (int actionBarSlotIndex = 0; actionBarSlotIndex < 9; ++actionBarSlotIndex) {
            this.addSlotToContainer(new Slot(inventoryPlayer, actionBarSlotIndex, 8 + actionBarSlotIndex * 18, 152));
        }
}

@Override
public boolean canInteractWith(EntityPlayer player) {

	return true;
}

// TODO Write our own version - this is taken from ContainerFurnace
@Override
public ItemStack transferStackInSlot(EntityPlayer par1EntityPlayer, int par2) {

	ItemStack var3 = null;
	Slot var4 = (Slot) inventorySlots.get(par2);

	if (var4 != null && var4.getHasStack()) {
		ItemStack var5 = var4.getStack();
		var3 = var5.copy();

		if (par2 == 2) {
			if (!this.mergeItemStack(var5, 3, 39, true))
				return null;

			var4.onSlotChange(var5, var3);
		}
		else if (!this.mergeItemStack(var5, 3, 39, false))
			return null;

		if (var5.stackSize == 0) {
			var4.putStack((ItemStack) null);
		}
		else {
			var4.onSlotChanged();
		}

		if (var5.stackSize == var3.stackSize)
			return null;

		var4.onPickupFromSlot(par1EntityPlayer, var5);
	}

	return var3;
}

}

I think you rather want to look at overriding mouseMovedOrUp() in your GUI class. Unfortunately, there are a lot of SRG variables in there...

Find the "drawItemStackTooltip" method in you GuiContainer. There you can write something like:

 

Item item = Item.itemsList[itemstack.itemID];

 

if(item.itemID == 1001){ // of course you can also type in vanilla id's to add tooltips to vanilla items and blocks as well

    list.add("my tooltip text");

}