Label Scope

[Specko]

Hello All,

I'm having trouble referencing a label in another function. At this point, I'm just learning and need a little help. Thanks to Zork for some skeleton code. Please code review and let me know why I'm getting nil reference on print(c.label:GetAlpha())

Line 58 works as expected.

  -----------------------------
  -- Learning
  -- Specko
  -----------------------------

  -----------------------------
  -- VARIABLES
  -----------------------------

  local wm = GetWindowManager()
  local em = GetEventManager()
  local print = d

  local KillingBlow = ZO_Object:Subclass()

  -----------------------------
  -- FUNCTIONS
  -----------------------------


  function KillingBlow:New()
    self.addonName = "KillingBlow"
    self.addonList = {}
    self:Initialize()
  end


  function KillingBlow:Initialize()
    self.control = self:CreateControl()
    self:InitializeEventManagement()
  end


  function KillingBlow:CreateControl()

	local path = "EsoUI/Common/Fonts/univers67.otf"
	local size = 25
	local style = "thick-outline"

    --main control
    local c = wm:CreateTopLevelWindow()
    c:SetDimensions(300,200)
    c:SetAnchor(CENTER,GuiRoot,CENTER,0,0)
    c:SetHidden(false)
    c:SetMovable(false)
    c:SetMouseEnabled(false)
    c:SetClampedToScreen(true)

	--label
    c.label = wm:CreateControl(nil, c, CT_LABEL)
    c.label:SetDimensions(300,200)
	c.label:SetAnchor(CENTER, c, CENTER, 75, -150)
	c.label:SetFont(path .. "|" .. size .. "|" ..  style)
	c.label:SetColor( 128,128,0,.5 )
	c.label:SetHorizontalAlignment( CENTER )
	c.label:SetVerticalAlignment( CENTER )
	c.label:SetText ( c.label:GetAlpha() )

	return c, c.label

  end

  function KillingBlow:labelScope()

	print(c.label:GetAlpha())

  end

  --OnAddOnLoaded event trigger func
  function KillingBlow:OnAddOnLoaded(event, name)
    self.addonList[#self.addonList] = { event = event or "unknown", name = name or "unknown"}
  end

  --OnPlayerActivated event trigger func
  function KillingBlow:OnPlayerActivated()
    print("KillingBlow Loaded")
  end




  --init events func
  function KillingBlow:InitializeEventManagement()
    --event registering
    em:RegisterForEvent(self.addonName.."_OnAddOnLoaded", EVENT_ADD_ON_LOADED, function(...) self:OnAddOnLoaded(...) end)
    em:RegisterForEvent(self.addonName.."_OnPlayerActivated", EVENT_PLAYER_ACTIVATED, function(...) self:OnPlayerActivated(...) end)
	em:RegisterForEvent(self.addonName.."_labelScope", EVENT_MOUNTED_STATE_CHANGED, function(...) self:labelScope(...) end)
  end

  -----------------------------
  -- CALL
  -----------------------------

  KillingBlow:New()

[Garkin]

Originally Posted by Specko Hello All, I'm having trouble referencing a label in another function. At this point, I'm just learning and need a little help. Thanks to Zork for some skeleton code. Please code review and let me know why I'm getting nil reference on print(c.label:GetAlpha()) Line 58 works as expected. ----------------------------- -- Learning -- Specko ----------------------------- ----------------------------- -- VARIABLES ----------------------------- local wm = GetWindowManager() local em = GetEventManager() local print = d local KillingBlow = ZO_Object:Subclass() ----------------------------- -- FUNCTIONS ----------------------------- function KillingBlow:New() self.addonName = "KillingBlow" self.addonList = {} self:Initialize() end function KillingBlow:Initialize() self.control = self:CreateControl() self:InitializeEventManagement() end function KillingBlow:CreateControl() local path = "EsoUI/Common/Fonts/univers67.otf" local size = 25 local style = "thick-outline" --main control local c = wm:CreateTopLevelWindow() c:SetDimensions(300,200) c:SetAnchor(CENTER,GuiRoot,CENTER,0,0) c:SetHidden(false) c:SetMovable(false) c:SetMouseEnabled(false) c:SetClampedToScreen(true) --label c.label = wm:CreateControl(nil, c, CT_LABEL) c.label:SetDimensions(300,200) c.label:SetAnchor(CENTER, c, CENTER, 75, -150) c.label:SetFont(path .. "|" .. size .. "|" .. style) c.label:SetColor( 128,128,0,.5 ) c.label:SetHorizontalAlignment( CENTER ) c.label:SetVerticalAlignment( CENTER ) c.label:SetText ( c.label:GetAlpha() ) return c, c.label end function KillingBlow:labelScope() print(c.label:GetAlpha()) end --OnAddOnLoaded event trigger func function KillingBlow:OnAddOnLoaded(event, name) self.addonList[#self.addonList] = { event = event or "unknown", name = name or "unknown"} end --OnPlayerActivated event trigger func function KillingBlow:OnPlayerActivated() print("KillingBlow Loaded") end --init events func function KillingBlow:InitializeEventManagement() --event registering em:RegisterForEvent(self.addonName.."_OnAddOnLoaded", EVENT_ADD_ON_LOADED, function(...) self:OnAddOnLoaded(...) end) em:RegisterForEvent(self.addonName.."_OnPlayerActivated", EVENT_PLAYER_ACTIVATED, function(...) self:OnPlayerActivated(...) end) em:RegisterForEvent(self.addonName.."_labelScope", EVENT_MOUNTED_STATE_CHANGED, function(...) self:labelScope(...) end) end ----------------------------- -- CALL ----------------------------- KillingBlow:New()

Table (or top level window) "c" is defined as local in function KillingBlow:CreateControl(), it is not visible outside of the function. However when you have initialized object, reference to this table was stored in self.control, so you can use this reference instead of "c":

function KillingBlow:labelScope()
 
   print(self.control.label:GetAlpha())
 
end

[Specko]

Originally Posted by Garkin Table (or top level window) "c" is defined as local in function KillingBlow:CreateControl(), it is not visible outside of the function. However when you have initialized object, reference to this table was stored in self.control, so you can use this reference instead of "c": function KillingBlow:labelScope()      print(self.control.label:GetAlpha())   end

Works, much appreciated. I'll get a handle on this eventually.