src/main/scala/li/cil/oc/common/container/Drone.scala

package li.cil.oc.common.container

import cpw.mods.fml.relauncher.Side
import cpw.mods.fml.relauncher.SideOnly
import li.cil.oc.client.gui.Icons
import li.cil.oc.common
import li.cil.oc.common.entity
import net.minecraft.entity.player.InventoryPlayer
import net.minecraft.inventory.IInventory

class Drone(playerInventory: InventoryPlayer, drone: entity.Drone) extends Player(playerInventory, drone.mainInventory) {
  val deltaY = 0

  for (i <- 0 to 1) {
    val y = 8 + i * slotSize - deltaY
    for (j <- 0 to 3) {
      val x = 98 + j * slotSize
      addSlotToContainer(new InventorySlot(this, otherInventory, inventorySlots.size, x, y))
    }
  }

  addPlayerInventorySlots(8, 66)

  class InventorySlot(container: Player, inventory: IInventory, index: Int, x: Int, y: Int) extends StaticComponentSlot(container, inventory, index, x, y, common.Slot.Any, common.Tier.Any) {
    def isValid = (0 until drone.mainInventory.getSizeInventory).contains(getSlotIndex)

    @SideOnly(Side.CLIENT)
    override def func_111238_b() = isValid && super.func_111238_b()

    override def getBackgroundIconIndex = {
      if (isValid) super.getBackgroundIconIndex
      else Icons.get(common.Tier.None)
    }

    override def getStack = {
      if (isValid) super.getStack
      else null
    }
  }

}