first commit of mpdarc widget. Works

(cherry picked from commit be69876)

mpdarc-widget/mpdarc.lua

@@ -0,0 +1,99 @@
+-------------------------------------------------
+-- mpd Arc Widget for Awesome Window Manager
+-- Modelled after Pavel Makhov's work
+
+-- @author Raphaël Fournier-S'niehotta
+-- @copyright 2018 Raphaël Fournier-S'niehotta
+-------------------------------------------------
+
+local awful = require("awful")
+local beautiful = require("beautiful")
+local spawn = require("awful.spawn")
+local watch = require("awful.widget.watch")
+local wibox = require("wibox")
+local naughty = require("naughty")
+
+local GET_MPD_CMD = "mpc status"
+local PAUSE_MPD_CMD = "mpc pause"
+local START_MPD_CMD = "mpc play"
+local STOP_MPD_CMD = "mpc stop"
+
+local PATH_TO_ICONS = "/usr/share/icons/Arc"
+local PAUSE_ICON_NAME = PATH_TO_ICONS .. "/actions/24/player_pause.png"
+local PLAY_ICON_NAME = PATH_TO_ICONS .. "/actions/24/player_play.png"
+local STOP_ICON_NAME = PATH_TO_ICONS .. "/actions/24/player_stop.png"
+
+local icon = wibox.widget { 
+        id = "icon",
+        widget = wibox.widget.imagebox,
+        image = PLAY_ICON_NAME
+    }
+local mirrored_icon = wibox.container.mirror(icon, { horizontal = true })
+
+local mpdarc = wibox.widget {
+    mirrored_icon,
+    max_value = 1,
+    value = 0.75,
+    thickness = 2,
+    start_angle = 4.71238898, -- 2pi*3/4
+    forced_height = 32,
+    forced_width = 32,
+    rounded_edge = true,
+    bg = "#ffffff11",
+    paddings = 0,
+    widget = wibox.container.arcchart
+}
+
+local mpdarc_widget = wibox.container.mirror(mpdarc, { horizontal = true })
+
+local update_graphic = function(widget, stdout, _, _, _)
+    stdout = string.gsub(stdout, "\n", "")
+    local mpdpercent = string.match(stdout, "(%d%d)%%")
+    local mpdstatus = string.match(stdout, "%[(%a+)%]")
+    if mpdstatus == "playing" then 
+      icon.image = PLAY_ICON_NAME
+      widget.colors = { beautiful.widget_main_color }
+      widget.value = tonumber((100-mpdpercent)/100)
+    elseif mpdstatus == "paused" then 
+      icon.image = PAUSE_ICON_NAME
+      widget.colors = { beautiful.widget_main_color }
+      widget.value = tonumber(mpdpercent/100)
+    else
+      icon.image = STOP_ICON_NAME
+      widget.colors = { beautiful.widget_red }
+    end
+end
+
+mpdarc:connect_signal("button::press", function(_, _, _, button)
+    if (button == 1) then awful.spawn("mpc toggle", false)      -- left click
+    elseif (button == 2) then awful.spawn("mpc stop", false) 
+    elseif (button == 3) then awful.spawn("mpc pause", false)
+    elseif (button == 4) then awful.spawn("mpc next", false)  -- scroll up
+    elseif (button == 5) then awful.spawn("mpc prev", false)  -- scroll down
+    end
+
+    spawn.easy_async(GET_MPD_CMD, function(stdout, stderr, exitreason, exitcode)
+        update_graphic(mpdarc, stdout, stderr, exitreason, exitcode)
+    end)
+end)
+
+local notification
+function show_MPD_status()
+    spawn.easy_async(GET_MPD_CMD,
+        function(stdout, _, _, _)
+            notification = naughty.notify {
+                text = stdout,
+                title = "MPD",
+                timeout = 5,
+                hover_timeout = 0.5,
+                width = 600,
+            }
+        end)
+end
+
+mpdarc:connect_signal("mouse::enter", function() show_MPD_status() end)
+mpdarc:connect_signal("mouse::leave", function() naughty.destroy(notification) end)
+
+watch(GET_MPD_CMD, 1, update_graphic, mpdarc)
+
+return mpdarc_widget