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  1. local sg = peripheral.wrap("right")
  2.  
  3. local favAddresses = {
  4.     {
  5.         title = "",
  6.         address = ""
  7.     }
  8. }
  9.  
  10. local event, p1, p2, p3 = nil
  11. local screenSelection = 1
  12. local screen = nil
  13. local prevX, prevY = nil
  14.  
  15. function resetScreen()
  16.     term.setBackgroundColor(colors.gray)
  17.     term.setTextColor(colors.black)
  18.     term.clear()
  19.     term.setCursorPos(1, 1)
  20. end
  21.  
  22. function PrintInline(text, x, y)
  23.     term.setCursorPos(prevX + x, prevY + y)
  24.     term.write(text)
  25.     prevX = prevX + x
  26.     prevY = prevY + y
  27. end
  28.  
  29. function Print(text, x, y)
  30.     term.setCursorPos(x, y)
  31.     term.write(text)
  32.     prevX = x
  33.     prevY = y
  34. end
  35.  
  36. function drawScreen(screenSettings)
  37.     resetScreen()
  38.    
  39.     term.setBackgroundColor(colors.white)
  40.     for i = 1, 3, 1 do
  41.         term.setCursorPos(1, i)
  42.         term.clearLine()
  43.     end
  44.     Print(screenSettings["title"], getCenterX(screenSettings["title"]), 2)
  45.     term.setBackgroundColor(colors.gray)
  46.    
  47.     --For each option of a screen
  48.     local line = getCenterY() - math.floor(tablelength(screenSettings["options"]) / 2)
  49.     local curSel = 1
  50.     for k, v in ipairs(screenSettings["options"]) do
  51.         local label = v["option"]
  52.         if curSel == screenSelection then
  53.             term.setTextColor(colors.white)
  54.             Print("[ ", getCenterX("[ " .. label .. " ]"), line)
  55.             term.setTextColor(colors.black)
  56.             PrintInline(label, string.len("[ "), 0, true)
  57.             term.setTextColor(colors.white)
  58.             PrintInline(" ]", string.len(label), 0, true)
  59.             term.setTextColor(colors.black)
  60.         else
  61.             Print(label, getCenterX(label), line)
  62.         end
  63.         line = line + 1
  64.         curSel = curSel + 1
  65.     end
  66. end
  67.  
  68. function getCenterX(text)
  69.     local x,_ = term.getSize()
  70.     return math.floor((x / 2) - (string.len(text) / 2))
  71. end
  72.  
  73. function getCenterY()
  74.     local _,y = term.getSize()
  75.     return math.floor(y / 2)
  76. end
  77.  
  78. function tablelength(T)
  79.   local count = 0
  80.   for _ in pairs(T) do count = count + 1 end
  81.   return count
  82. end
  83.  
  84. function tableAt(T, index)
  85.     local i = 0
  86.     for _, v in pairs(T) do
  87.         if i == index then
  88.             return v
  89.         end
  90.         i = i + 1
  91.     end
  92. end
  93.  
  94. function startup()
  95.     screenSelection = 1
  96.     screen = {
  97.         title = "Stargate Control Program",
  98.         options = {
  99.             {
  100.                 option = "Dial Favorite",
  101.                 func = dialFavoriteScreen
  102.             },
  103.             {
  104.                 option = "Dial Manually",
  105.                 func = dialFavoriteScreen
  106.             },
  107.             {
  108.                 option = "Exit",
  109.                 func = exitProgram
  110.             }
  111.         }
  112.     }
  113. end
  114.  
  115. function dialFavoriteScreen()
  116.  
  117. end
  118.  
  119. function exitProgram()
  120.     os.reboot()
  121. end
  122.  
  123. function awaitEvent()
  124.     event, p1, p2, p3 = os.pullEvent()
  125. end
  126.  
  127. function isSelectionChanged()
  128.     if event == "key" then
  129.         if p1 == keys.up then
  130.             if screenSelection == 1 then
  131.                 screenSelection = tablelength(screen["options"])
  132.             else
  133.                 screenSelection = screenSelection - 1
  134.             end
  135.         elseif p1 == keys.down then
  136.             if screenSelection == tablelength(screen["options"]) then
  137.                 screenSelection = 1
  138.             else
  139.                 screenSelection = screenSelection + 1
  140.             end
  141.         end
  142.     end
  143. end
  144.  
  145. function isSelctionSelected()
  146.     if event == "key" then
  147.         if p1 == keys.enter then
  148.             tableAt(screen["options"], screenSelection - 1)["func"]()
  149.         end
  150.     end
  151. end
  152.  
  153. startup()
  154.  
  155. while true do
  156.     awaitEvent()
  157.     isSelectionChanged()
  158.     isSelctionSelected()
  159.     drawScreen(screen)
  160. end
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