Monitor Tutorial P2ex3

-- Set up variables
local attachedMonitor = peripheral.wrap("top")
local defaultBackgroundColor =colors.black
local defaultTextColor=colors.white

local backgroundColorNormal = colors.blue
local backgroundColorPressed = colors.red

local textColorNormal = colors.white
local textColorPressed = colors.yellow

local width=10
local height = 3

local label="Button"

local startColumn=3
local startRow=3

local labelPad = 2

-- Set up Monitor
if not attachedMonitor.isColor() then
    attachedMonitor.setBackgroundColor(colors.black)
    attachedMonitor.setTextColor(colors.white)
else
    attachedMonitor.setBackgroundColor(defaultBackgroundColor)
    attachedMonitor.setTextColor(defaultTextColor)
end
--attachedMonitor.setTextScale(.5)
attachedMonitor.clear()

-- set the button/label color to normal (not pressed) colors
if not attachedMonitor.isColor() then
    attachedMonitor.setBackgroundColor(colors.black)
    attachedMonitor.setTextColor(colors.white)
else
    attachedMonitor.setBackgroundColor(backgroundColorNormal)
    attachedMonitor.setTextColor(textColorNormal)
end

-- Display the button Background
for row = startRow,startRow+height-1 do
    attachedMonitor.setCursorPos(startColumn,row)
    attachedMonitor.write(string.rep(" ",width))
end

-- prepare label, truncate label if necessary
if width < 3 then
    labelPad = 0
end
if #label > width - labelPad then
    label = label:sub(1,width - labelPad)
end

--Display the label (auto centered)
attachedMonitor.setCursorPos(startColumn + math.floor((width - #label)/2),startRow + math.floor((height-1)/2))
attachedMonitor.write(label)

-- reset to original text/background colors
if not attachedMonitor.isColor() then
    attachedMonitor.setBackgroundColor(colors.black)
    attachedMonitor.setTextColor(colors.white)
else
    attachedMonitor.setBackgroundColor(defaultBackgroundColor)
    attachedMonitor.setTextColor(defaultTextColor)
end

-- sleep and then let's do it again with our "pressed" colors.
sleep(3)

-- set button/label colors to pressed colors
if not attachedMonitor.isColor() then
    attachedMonitor.setBackgroundColor(colors.white)
    attachedMonitor.setTextColor(colors.black)
else
    attachedMonitor.setBackgroundColor(backgroundColorPressed)
    attachedMonitor.setTextColor(textColorPressed)
end

-- Display the button Background
for row = startRow,startRow+height-1 do
    attachedMonitor.setCursorPos(startColumn,row)
    attachedMonitor.write(string.rep(" ",width))
end

-- prepare label, truncate label if necessary
if width < 3 then
    labelPad = 0
end
if #label > width - labelPad then
    label = label:sub(1,width - labelPad)
end


--Display the label (auto centered)
attachedMonitor.setCursorPos(startColumn + math.floor((width - #label)/2),startRow + math.floor((height-1)/2))
attachedMonitor.write(label)

-- reset monitor
if not attachedMonitor.isColor() then
    attachedMonitor.setBackgroundColor(colors.black)
    attachedMonitor.setTextColor(colors.white)
else
    attachedMonitor.setBackgroundColor(defaultBackgroundColor)
    attachedMonitor.setTextColor(defaultTextColor)
end

attachedMonitor.setCursorPos(1,8)
attachedMonitor.write("Done.")
print()