TangentPaint 0.5

--TangentPaint V.0.5
--Part one of the final product!

--VARIABLE SETUP--
width,height=term.getSize()
print(height) print(width)

colorNames=
{
"white",
"orange",
"magenta",
"lightblue",
"yellow",
"lime",
"pink",
"gray",
"lightgray",
"cyan",
"purple",
"blue",
"brown",
"green",
"red",
"black"
}

decHexTable={"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"}

canvas={}
for i=1,height-1 do
  canvas[i]={}
  for j=1,width do
    canvas[i][j]=0
  end
end

overlay={}
for i=1,height do
  overlay[i]={}
  for j=1,width do
    overlay[i][j]=0
  end
end

lastPosition={0,0}
colorSelected=1
alive=true
--FUNCTIONS--
function drawTools()
  term.setBackgroundColor(colors.gray)
  term.setCursorPos(1,height)
  overlay={1,1,1,0,2,2,2,0,3,3,3,0,4,4,4}
  io.write("[L] [S] [M] [X]")
  term.setBackgroundColor(2^colorSelected-1)
  io.write(colorNames[colorSelected])
end

function drawCanvas()
  for i=1,height-1 do
    for j=1,width do
      term.setBackgroundColor(2^canvas[i][j])
      io.write(" ")
      term.setBackgroundColor(2^0)
    end
    io.write("\n")
  end
end

function paintLoad()
    loadData={}
    term.setBackgroundColor(colors.gray)
    term.setCursorPos(1,height)
    for i=1,width do io.write(" ") end
    term.setCursorPos(1,height)
    loadName=io.read()

    if fs.exists(loadName) then
        file = io.open(loadName, "r")
        line = file:read()
        io.write(line)
        file:close()
    end

    for i=1,string.len(line) do
        loadData[i]=string.sub(line,i,i)
    end
    for i=1,#loadData do
        io.write(loadData[i])
    end

    k=1
    for i=1,height-1 do
        for j=1,width do
            for decode=1,16 do if loadData[k]==decHexTable[decode] then canvas[i][j]=decode-1 end end
            k=k+1
        end
    end

    for i=1,#loadData do
        print(loadData[i])
    end


    for i=1,height-1 do
        for j=1,width do
            io.write(canvas[i][j])
        end
        io.write("\n")
    end



    drawCanvas()
end

function paintSave()
    term.setBackgroundColor(colors.gray)
    term.setCursorPos(1,height)
    for i=1,width do io.write(" ") end
    term.setCursorPos(1,height)
    saveName=io.read()

    local saveDir = saveName:sub(1, saveName:len() - fs.getName(saveName):len() )
    if not fs.exists(saveDir) then
        fs.makeDir( saveName )
    end

    file = fs.open(saveName, "w")
    --file.write(width..","..height.."|")
    for i=1,height-1 do
        for j=1,width do
            print(i..","..j..":"..canvas[i][j])
            index=canvas[i][j]+1
            file.write(decHexTable[index])
        end
    end
    file.close()
end

function paintMenu()
end

function paintExit()
  alive=false
  term.setBackgroundColor(colors.black)
  shell.run("clear")
  error()
end

function screenInteract()
  if mouseY==height then checkToolBar() return end

  if mouseButton==2 then
    canvas[mouseY][mouseX]=0
  end

  if mouseButton==1 then
    canvas[mouseY][mouseX]=colorSelected-1
  end

  if mouseButton==5 then
    colorSelected=colorSelected+1
    if colorSelected==17 then colorSelected=1 end
  end

  if mouseButton==4 then
    colorSelected=colorSelected-1
    if colorSelected==0 then colorSelected=16 end
  end
end

function checkToolBar()
    toolbarSelection=overlay[mouseX]
    if toolbarSelection==1 then paintLoad() end
    if toolbarSelection==2 then paintSave() end
    if toolbarSelection==3 then paintMenu() end
    if toolbarSelection==4 then paintExit() end
end

--MAIN PROGRAM--
while alive do
drawCanvas()
drawTools()

event,mouseX,mouseY,mouseButton=os.pullEvent("click")
screenInteract()
drawCanvas()
end