monitor

MonitorObj = {}

function MonitorObj:new(periph, scale)
    local obj = obj or {}
    setmetatable(obj, {__index = self})

    obj.mon = peripheral.find("monitor") or periph -- if nothing is put in, find nearest monitor
    obj.w, obj.h = obj.mon.getSize()

    obj.scale = scale or 1

    obj.mon.setTextScale(obj.scale)

    return obj
end

function MonitorObj:clear()
    local old = term.redirect(self.mon)
    self.mon.setCursorPos(1,1)
    self.mon.setTextScale(self.scale)
    self.mon.setTextColor(colors.white)
    self.mon.setBackgroundColor(colors.black)
    self.mon.clear()
    term.redirect(old)
end

function MonitorObj:write(txt, x, y, cBg, cTxt)
    local c1 = cBg or colors.black
    local c2 = cTxt or colors.white

    local old = term.redirect(self.mon)
    local oldTC = self.mon.getTextColor()       -- old text color
    local oldBC = self.mon.getBackgroundColor() -- old background color

    self.mon.setCursorPos(x,y)
    self.mon.setBackgroundColor(c1)
    self.mon.setTextColor(c2)
    self.mon.write(txt)

    self.mon.setTextColor(oldTC)
    self.mon.setBackgroundColor(oldBC)
    term.redirect(old)
end

function MonitorObj:getMonitor()
    return self.mon
end

function MonitorObj:setMonitor(periph)
    self:clear()
    self.mon = periph
    self:updateSize()
end

function MonitorObj:getSize()
    self:updateSize()
    return self.w, self.h
end

function MonitorObj:updateSize()
    self.mon.setTextScale(self.scale)
    local x,y = self.mon.getSize()
    self.w = x
    self.h = y
end

function MonitorObj:setScale(scale)
    self.scale = scale or 1
    self:updateSize()
end

function MonitorObj:getScale()
    return self.scale
end