Move placeholder logic into ui-textinput

externals/ui-textinput.lua

@@ -5,11 +5,28 @@ local myname, ns = ...
 local BORDER_TEXTURE = "Interface\\Common\\Common-Input-Border"
 
 
+local function OnShow(self)
+  self:SetText("")
+  self.placeholder:Show()
+end
+
+
+local function OnEditFocusGained(self)
+  self.placeholder:Hide()
+end
+
+
+local function OnEditFocusLost(self)
+	if self:GetText() == "" then self.placeholder:Show() end
+end
+
+
+local FONT = "GameFontHighlightSmall"
 function ns.NewTextInput(parent)
   local editbox = CreateFrame("EditBox", nil, parent)
   editbox:SetAutoFocus(false)
   editbox:SetSize(105, 32)
-  editbox:SetFontObject("GameFontHighlightSmall")
+  editbox:SetFontObject(FONT)
 
   local left = editbox:CreateTexture(nil, "BACKGROUND")
   left:SetSize(8, 20)
@@ -30,6 +47,14 @@ function ns.NewTextInput(parent)
   center:SetTexture(BORDER_TEXTURE)
   center:SetTexCoord(0.0625, 0.9375, 0, 0.625)
 
+  local placeholder = editbox:CreateFontString(nil, nil, FONT)
+  placeholder:SetPoint("LEFT")
+  placeholder:SetTextColor(0.75, 0.75, 0.75, 1)
+  editbox.placeholder = placeholder
+
+  editbox:SetScript("OnShow", OnShow)
+  editbox:SetScript("OnEditFocusGained", OnEditFocusGained)
+  editbox:SetScript("OnEditFocusLost", OnEditFocusLost)
   editbox:SetScript("OnEscapePressed", editbox.ClearFocus)
   editbox:SetScript("OnEnterPressed", editbox.ClearFocus)