test

os = require("os")
term = require("term")
component = require("component")

gpu = component.gpu

function throwError(errorMessage)
  gpu.setResolution(gpu.maxResolution())
  gpu.setForeground(0xff0000)
  gpu.setBackground(0x000000)
  term.clear()
  print("The program ran into a serious error during execution.")
  print(errorMessage)
  gpu.setForeground(0xffffff)
  os.exit()
end

function addRect(x1,y1,x2,y2,color)
  temp = gpu.getBackground()
  gpu.setBackground(color)
  gpu.fill(x1,y1,x2-x1+1,y2-y1+1," ")
  gpu.setBackground(temp)
end

function addProgressBar(x1,y1,x2,y2,sideWidth,sideHeight,borderColor,filledBarColor,emptyBarColor,textColor,headerText,filledPercentage,isSideways,isInverted)
  isSideways = isSideways or false
  isInverted = isInverted or false
  if type(x1)~="number" then throwError("addProgressBar() argument 1 (x1) type int expected, "..type(x1).." found") end
  if type(x2)~="number" then throwError("addProgressBar() argument 3 (x2) type int expected, "..type(x2).." found") end
  if type(y1)~="number" then throwError("addProgressBar() argument 2 (y1) type int expected, "..type(y1).." found") end
  if type(y2)~="number" then throwError("addProgressBar() argument 4 (y2) type int expected, "..type(y2).." found") end
  if type(sideWidth)~="number" then throwError("addProgressBar() argument 5 (sideWidth) type int expected, "..type(sideWidth).." found") end
  if type(sideHeight)~="number" then throwError("addProgressBar() argument 6 (sideHeight) type int expected, "..type(sideHeight).." found") end
  if type(filledPercentage)~="number" then throwError("addProgressBar() argument 11 (filledPercentage) type float expected, "..type(filledPercentage).." found") end

  if isSideways == false then
    addRect(x1,y1,x2,y2,borderColor)
    addRect(x1+sideWidth,y1+sideHeight,x2-sideWidth,y2-sideHeight,emptyBarColor)
    barSize = (y2-y1-2*sideHeight)
    pixelsFilled = math.floor(filledPercentage*barSize+0.5)
    if isInverted == false then
      addRect(x1+sideWidth,y2-sideHeight-pixelsFilled,x2-sideWidth,y2-sideHeight,filledBarColor)
    elseif isInverted == true then
      addRect(x1+sideWidth,y1+sideHeight,x2-sideWidth,y1+sideHeight+pixelsFilled,filledBarColor)
    else
      throwError("addProgressBar() argument 13 (isInverted) type boolean expected, "..type(isInverted).." found")
    end
  elseif isSideways == true then
    addRect(x1,y1,x2,y2,borderColor)
    addRect(x1+sideWidth,y1+sideHeight,x2-sideWidth,y2-sideHeight,emptyBarColor)
    barSize = (x2-x1-2*sideWidth)
    pixelsFilled = math.floor(filledPercentage*barSize+0.5)
    if isInverted == false then
      addRect(x1+sideWidth,y1+sideHeight,x1+sideWidth+pixelsFilled,y2-sideHeight,filledBarColor)
    elseif isInverted == true then
      addRect(x2-sideWidth-pixelsFilled,y1+sideHeight,x2-sideWidth,y2-sideHeight,filledBarColor)
    else
      throwError("addProgressBar() argument 13 (isInverted) type boolean expected, "..type(isInverted).." found")
    end
  else
    throwError("addProgressBar() argument 12 (isSideways) type boolean expected, "..type(isSideways).." found")
  end
  if sideHeight>0 then
    col = {f = gpu.getForeground(),b = gpu.getBackground()}
    centerX = math.ceil((x1+x2)/2)
    centerY = math.floor(y1+sideHeight/2)
    gpu.setForeground(textColor)
    gpu.setBackground(borderColor)
    gpu.set(centerX-(string.len(tostring(headerText))/2),centerY,tostring(headerText))
    gpu.setForeground(col.f)
    gpu.setBackground(col.b)
    centerX = nil
    centerY = nil
    col = nil
  end
end