awesomewm/modules/mpc/widget.lua

local mpc = req_rel(..., "util")
local mpc_widget = {}

mpc_widget.title = wibox.widget.textbox("MPD is not")
mpc_widget.title.valign = "center"
mpc_widget.title.align = "left"
mpc_widget.title.font = "Hack NF 12"
mpc_widget.title.ellipsize = "end"
mpc_widget.title.forced_width = beautiful.dpi(conf.mpc_width)

mpc_widget.artist = wibox.widget.textbox("connected")
mpc_widget.artist.valign = "center"
mpc_widget.artist.align = "left"
mpc_widget.artist.font = "Hack NF 12"
mpc_widget.artist.ellipsize = "end"
mpc_widget.artist.forced_width = beautiful.dpi(conf.mpc_width)

mpc_widget.volume = wibox.widget.textbox("??")
mpc_widget.volume.valign = "center"
mpc_widget.volume.align = "left"
mpc_widget.volume.font = "Hack NF 10"
mpc_widget.volume.ellipsize = "end"
mpc_widget.volume.forced_width = beautiful.dpi(10)


mpc_widget.icon_play = wibox.widget {
	resize = true,
	image = beautiful.icons.music.blue.playing,
	widget = wibox.widget.imagebox
}



mpc_widget.left = wibox.widget {
	wibox.widget {
		{
			mpc_widget.icon_play,
			top = beautiful.dpi(2),
			bottom = beautiful.dpi(2),
			left = 0, right = 0,
			layout = wibox.container.margin,
		},
		mpc_widget.volume,

		forced_num_cols = 1,
		forced_num_rows = 2,
		homogeneous     = true,
		expand          = true,
		layout = wibox.layout.grid
	},
	layout = wibox.container.background
}

mpc_widget.right = wibox.widget {
	wibox.widget {
		mpc_widget.title,
		mpc_widget.artist,

		forced_num_cols = 1,
		forced_num_rows = 2,
		homogeneous     = true,
		expand          = true,
		layout = wibox.layout.grid
	},
	layout = wibox.container.background,
}

mpc_widget.widget = wibox.widget {
	{
		{   -- Right spacer
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},

		mpc_widget.left,
		mpc_widget.right,

		{   -- Left spacer
			widget = wibox.widget.separator,
			color = beautiful.color.transparent,
			forced_width = beautiful.dpi(3)
		},
		layout = wibox.layout.align.horizontal,
	},
	layout = wibox.container.background,
}


mpc_widget.widget:connect_signal("mouse::enter",function(result)
	mpc_widget.widget.bg = beautiful.color.bar.hover_bg
end)

mpc_widget.widget:connect_signal("mouse::leave", function(result)
	mpc_widget.widget.bg = beautiful.color.transparent
end)


mpc_widget.widget:connect_signal("button::press",
	function(_, _, _, button, mods)
		if (button == 3) or (button == 1)then
			mpc.mpc_command("toggle")
		end
		mpc_widget.readupdate()
	end
)


mpc_widget.right:connect_signal("button::press",
	function(_, _, _, button, mods)
		if (button == 4) then -- Scroll up
			mpc.mpc_command("prev")
		elseif (button == 5) then -- Scroll down
			mpc.mpc_command("next")
		end

		mpc_widget.readupdate()
	end
)


mpc_widget.left:connect_signal("button::press",
	function(_, _, _, button, mods)
		if (button == 4) then -- Scroll up
			mpc.mpc_command("volume +5")
		elseif (button == 5) then -- Scroll down
			mpc.mpc_command("volume -5")
		end
		mpc_widget.readupdate()
	end
)

mpc_widget.readupdate = function()
	-- Update title and artist
	mpc.mpc_command("current --format \"title=%title% artist=%artist%\"",
		function(stdout, stderr, exitreason, exitcode)
			if (stdout == "") then
				return
			end

			mpc_widget.title.markup = string.match(stdout, "title=(.*)artist=")
			mpc_widget.artist.markup = string.match(stdout, "artist=(.*)")
		end
	)

	-- Update status
	mpc.mpc_command("status",
		function(stdout, stderr, exitreason, exitcode)
			local play = string.match(stdout, "(%[playing)") or false
			local pause = string.match(stdout, "(%[paused)") or false
			local stop = not (play or pause)

			if (play) then
				mpc_widget.icon_play.image = beautiful.icons.music.blue.playing
			elseif (pause) then
				mpc_widget.icon_play.image = beautiful.icons.music.blue.paused
			elseif (stop) then
				mpc_widget.icon_play.image = beautiful.icons.music.blue.stopped
			end

			local volume = string.match(stdout, "volume: (%d?%d?%d)%%")
			if (volume) then
				mpc_widget.volume.markup = volume .. "%"
			else
				mpc_widget.volume.markup = ""
			end
		end
	)
end


-- Short delay here, the --wait option makes mpc block until
-- a change is detected.
mpc.mpc_watch(
	"current --wait",
	0.01,
	function(_, stdout)
		mpc_widget.readupdate()
	end,
	mpc_widget.widget
)

mpc.mpc_watch(
	"current",
	1,
	function(_, stdout)
		mpc_widget.readupdate()
	end,
	mpc_widget.widget
)


-- Make sure you do an initial read, otherwise the widget will
-- not update until a change occurs.
mpc_widget.readupdate()


return mpc_widget