lock widgets

-- Create a keylock widget
capslock = widget({ type = "textbox", align = "center" })
capslock.width = 40
scrolllock = widget({ type = "textbox", align = "center" })
scrolllock.width = 44
numlock = widget({ type = "textbox", align = "center" })
numlock.width = 36

do
        local update = function()
                local str = io.popen("xset q | grep Caps"):read()
                local caps = string.sub(str, string.find(str, "Caps"), string.find(str, "01") - 5):find("off") == nil
                local num = string.sub(str, string.find(str, "Num"), string.find(str, "02") - 5):find("off") == nil
                local scroll = string.sub(str, string.find(str, "Scroll"), -1):find("off") == nil
                local capsstr = "<span " .. (caps and "font_desc='Sans Bold'" or "color='" .. theme.fg_focus .. "'") .. ">Caps</span>"
                local numstr = "<span " .. (num and "font_desc='Sans Bold'" or "color='" .. theme.fg_focus .. "'") .. ">Num</span>"
                local scrollstr = "<span " .. (scroll and "font_desc='Sans Bold'" or "color='" .. theme.fg_focus .. "'") .. ">Scroll</span>"
                capslock.text = " " .. capsstr .. " "
        --      capslock.bg = caps and theme.bg_focus or theme.bg_normal
                scrolllock.text = " " .. scrollstr .. " "
        --      scrolllock.bg = scroll and theme.bg_focus or theme.bg_normal
                numlock.text = " " .. numstr .. " "
        --      numlock.bg = num and theme.bg_focus or theme.bg_normal
        end
        timer = timer { timeout = 0.001 }
        timer:add_signal( "timeout", function() update() end)
        timer:start()
end