different fix for #3764

Author: asiekierka

src/main/resources/assets/opencomputers/lang/en_US.lang

@@ -231,6 +231,7 @@ oc:gui.Rack.Right=Right
 oc:gui.Rack.Enabled=Enabled
 oc:gui.Rack.Disabled=Disabled
 oc:gui.Rack.RelayModeTooltip=Relay Mode
+oc:gui.Rack.OrientationTooltip=Note: If facing the front[nl]of the Rack, the right[nl]side of the Rack is to[nl]your left.
 oc:gui.Rack.Top=Top
 oc:gui.Switch.PacketsPerCycle=Packets / cycle
 oc:gui.Switch.QueueSize=Queue size

src/main/scala/li/cil/oc/Localization.scala

@@ -147,6 +147,8 @@ object Localization {
     def RelayDisabled = localizeImmediately("gui.Rack.Disabled")
 
     def RelayModeTooltip: String = localizeImmediately("gui.Rack.RelayModeTooltip")
+
+    def OrientationTooltip: String = localizeImmediately("gui.Rack.OrientationTooltip")
   }
 
   object Switch {

src/main/scala/li/cil/oc/client/gui/Rack.scala

@@ -81,8 +81,8 @@ class Rack(playerInventory: InventoryPlayer, val rack: tileentity.Rack) extends
   def sideName(side: ForgeDirection) = side match {
     case ForgeDirection.UP => Localization.Rack.Top
     case ForgeDirection.DOWN => Localization.Rack.Bottom
-    case ForgeDirection.WEST => Localization.Rack.Left
-    case ForgeDirection.EAST => Localization.Rack.Right
+    case ForgeDirection.WEST => Localization.Rack.Right
+    case ForgeDirection.EAST => Localization.Rack.Left
     case ForgeDirection.NORTH => Localization.Rack.Back
     case _ => Localization.Rack.None
   }
@@ -250,6 +250,13 @@ class Rack(playerInventory: InventoryPlayer, val rack: tileentity.Rack) extends
         x, y, 0x404040)
     }
 
+    if (mouseX >= guiLeft + 122 && mouseY >= guiTop + 20 && mouseX < guiLeft + 158 && mouseY < guiTop + 20 + 5 * 11) {
+      val tooltip = new java.util.ArrayList[String]
+      tooltip.addAll(asJavaCollection(Localization.Rack.OrientationTooltip.lines.toIterable))
+      copiedDrawHoveringText(tooltip, mouseX - guiLeft, mouseY - guiTop, fontRendererObj)
+
+    }
+
     if (relayButton.func_146115_a) {
       val tooltip = new java.util.ArrayList[String]
       tooltip.addAll(asJavaCollection(Localization.Rack.RelayModeTooltip.lines.toIterable))