Update iv_drip.dm

code/game/machinery/iv_drip.dm

@@ -3,13 +3,14 @@
 
 /obj/machinery/iv_drip
 	name = "\improper IV drip"
-	desc = "An IV drip with an advanced infusion pump that can both drain blood into and inject liquids from attached containers. Blood packs are processed at an accelerated rate."
+	desc = "An IV drip with an advanced infusion pump that can both drain blood into and inject liquids from attached containers. Blood packs are processed at an accelerated rate. Alt-Click to change the transfer rate."
 	icon = 'icons/obj/iv_drip.dmi'
 	icon_state = "iv_drip"
 	anchored = FALSE
 	mouse_drag_pointer = MOUSE_ACTIVE_POINTER
 	var/mob/living/carbon/attached
 	var/mode = IV_INJECTING
+	var/dripfeed = FALSE
 	var/obj/item/reagent_containers/beaker
 	var/static/list/drip_containers = typecacheof(list(/obj/item/reagent_containers/blood,
 									/obj/item/reagent_containers/food,
@@ -132,9 +133,11 @@
 		if(mode)
 			if(beaker.reagents.total_volume)
 				var/transfer_amount = 5
+				if (dripfeed)
+					transfer_amount = 1
 				if(istype(beaker, /obj/item/reagent_containers/blood))
 					// speed up transfer on blood packs
-					transfer_amount = 10
+					transfer_amount *= 2
 				var/fraction = min(transfer_amount/beaker.reagents.total_volume, 1) //the fraction that is transfered of the total volume
 				beaker.reagents.reaction(attached, INJECT, fraction, FALSE) //make reagents reacts, but don't spam messages
 				beaker.reagents.trans_to(attached, transfer_amount)
@@ -169,6 +172,16 @@
 	else
 		toggle_mode()
 
+/obj/machinery/iv_drip/AltClick(mob/living/user)
+	if(!user.canUseTopic(src, be_close=TRUE))
+		return
+	if(dripfeed)
+		dripfeed = FALSE
+		to_chat(usr, "<span class='notice'>You loosen the valve to speed up the [src].</span>")
+	else
+		dripfeed = TRUE
+		to_chat(usr, "<span class='notice'>You tighten the valve to slowly drip-feed the contents of [src].</span>")
+
 /obj/machinery/iv_drip/attack_robot(mob/user)
 	if(Adjacent(user))
 		attack_hand(user)