Gui/Container over haul to get Bus Guis working.

container/slot/AppEngSlot.java

@@ -1,5 +1,6 @@
 package appeng.container.slot;
 
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.inventory.IInventory;
 import net.minecraft.inventory.Slot;
 import net.minecraft.item.ItemStack;
@@ -12,8 +13,15 @@ public class AppEngSlot extends Slot
 		NotAvailable, Valid, Invalid
 	};
 
+	public boolean isDraggable = true;
 	public boolean isPlayerSide = false;
 
+	public Slot setNotDraggable()
+	{
+		isDraggable = false;
+		return this;
+	}
+
 	public Slot setPlayerSide()
 	{
 		isPlayerSide = true;
@@ -24,6 +32,17 @@ public class AppEngSlot extends Slot
 	public hasCalculatedValidness isValid;
 	public int defX, defY;
 
+	@Override
+	public boolean func_111238_b()
+	{
+		return isEnabled();
+	}
+
+	public boolean isEnabled()
+	{
+		return true;
+	}
+
 	public String getTooltip()
 	{
 		return null;
@@ -48,6 +67,9 @@ public class AppEngSlot extends Slot
 	@Override
 	public ItemStack getStack()
 	{
+		if ( !isEnabled() )
+			return null;
+
 		if ( isDisplay )
 		{
 			isDisplay = false;
@@ -56,6 +78,34 @@ public class AppEngSlot extends Slot
 		return super.getStack();
 	}
 
+	@Override
+	public void putStack(ItemStack par1ItemStack)
+	{
+		if ( isEnabled() )
+			super.putStack( par1ItemStack );
+	}
+
+	public void clearStack()
+	{
+		super.putStack( null );
+	}
+
+	@Override
+	public boolean canTakeStack(EntityPlayer par1EntityPlayer)
+	{
+		if ( isEnabled() )
+			return super.canTakeStack( par1EntityPlayer );
+		return false;
+	}
+
+	@Override
+	public boolean isItemValid(ItemStack par1ItemStack)
+	{
+		if ( isEnabled() )
+			return super.isItemValid( par1ItemStack );
+		return false;
+	}
+
 	public ItemStack getDisplayStack()
 	{
 		return super.getStack();