gistfile1.lua

    awful.key({ "Mod1",           }, " ",
        function (c)
			local grabberCopy
			local grabberCallback = awful.keygrabber.run(
				function( mod, key, event )
					local stopGrabbing = false

					if key == "x" and event == "press" then
						c.maximized_horizontal = not c.maximized_horizontal
						c.maximized_vertical   = not c.maximized_vertical
						stopGrabbing = true
					end

					if stopGrabbing then
						awful.keygrabber.stop( grabberCopy )
					end
				end)
			grabberCopy = grabberCallback
        end)