QGUILib

local lib = {backgroundColor = colors.black, redir = term.native()}
local logLine = 1
function lib.puWrap(f, ...)
    term.current(lib.redir)
    f(...)
    term.setBackgroundColor(lib.backgroundColor)
end

function lib.print(...)
    term.redirect(term.native())
    local _, maxLine = term.getSize()
    if logLine < maxLine then
        term.setCursorPos(1, logLine)
        print(...)
        logLine = logLine + 1
    else
       term.scroll(1)
       term.setCursorPos(1, logLine)
       print(...)
    end
    term.redirect(lib.redir)
end

local function createElement(x, y)
    x = x or 1
    y = y or 1

    local self = {x = x, y = y}

    local draw = function() lib.print("drawed at " .. self.x .. ", " .. self.y) end
    local getPosition = function() return self.x, self.y end
    local setPosition = function(xNew, yNew) self.x = xNew; self.y = yNew end

    return {
        draw = draw,
        getPosition = getPosition,
        setPosition = setPosition
    }

end

function lib.newPixel(x, y, color)
    x = x or 1
    y = y or 1
    color = color or colors.white

    local self = {color = color, xprev = nil, yprev = nil}

    local o = {}
    setmetatable(o, {__index = createElement(x, y)})
    local super = getmetatable(o).__index

    o.setColor = function(newColor) self.color = newColor end
    o.getColor = function() return self.color end
    o.draw = function()
        if self.xprev then lib.puWrap(paintutils.drawPixel, self.xprev, self.yprev, lib.backgroundColor) end
        super.draw()
        local xcur, ycur = o.getPosition()
        lib.puWrap(paintutils.drawPixel, xcur, ycur, self.color)
    end
    o.setPosition = function(xNew, yNew)
        self.xprev, self.yprev = o.getPosition()
        super.setPosition(xNew, yNew)
    end


    return o
end



function lib.init()
    term.redirect(term.native())
    term.setBackgroundColor(lib.backgroundColor)
    term.clear()
    term.redirect(lib.redir)
    term.setBackgroundColor(lib.backgroundColor)
    term.clear()
end
return lib