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 --[[
 This conky config reEdit by despot77 at http://gnome-look.org/content/show.php/Conky+lua?content=139024
 
 This script draws percentage meters as rings, and also draws clock hands if you want! It is fully customisable; all options are described in the script. This script is based off a combination of my clock.lua script and my rings.lua script.
 
 IMPORTANT: if you are using the 'cpu' function, it will cause a segmentation fault if it tries to draw a ring straight away. The if statement on line 145 uses a delay to make sure that this doesn't happen. It calculates the length of the delay by the number of updates since Conky started. Generally, a value of 5s is long enough, so if you update Conky every 1s, use update_num>5 in that if statement (the default). If you only update Conky every 2s, you should change it to update_num>3; conversely if you update Conky every 0.5s, you should use update_num>10. ALSO, if you change your Conky, is it best to use "killall conky; conky" to update it, otherwise the update_num will not be reset and you will get an error.
 
 To call this script in Conky, use the following (assuming that you save this script to ~/scripts/rings.lua):
     lua_load ~/scripts/clock_rings.lua
     lua_draw_hook_pre clock_rings
 
 Original Conky :
 2011mint -- reEdit despot77 (18.02.2011)
 ]]
 
 settings_table = {
     {
         -- Edit this table to customise your rings.
         -- You can create more rings simply by adding more elements to settings_table.
         -- "name" is the type of stat to display; you can choose from 'cpu', 'memperc', 'fs_used_perc', 'battery_used_perc'.
         name='time',
         -- "arg" is the argument to the stat type, e.g. if in Conky you would write ${cpu cpu0}, 'cpu0' would be the argument. If you would not use an argument in the Conky variable, use ''.
         arg='%I.%M',
         -- "max" is the maximum value of the ring. If the Conky variable outputs a percentage, use 100.
         max=12,
         -- "bg_colour" is the colour of the base ring.
         bg_colour=0xffffff,
         -- "bg_alpha" is the alpha value of the base ring.
         bg_alpha=0.1,
         -- "fg_colour" is the colour of the indicator part of the ring.
         fg_colour=0x4EC6DE,
         -- "fg_alpha" is the alpha value of the indicator part of the ring.
         fg_alpha=0.2,
         -- "x" and "y" are the x and y coordinates of the centre of the ring, relative to the top left corner of the Conky window.
         x=100, y=150,
         -- "radius" is the radius of the ring.
         radius=50,
         -- "thickness" is the thickness of the ring, centred around the radius.
         thickness=5,
         -- "start_angle" is the starting angle of the ring, in degrees, clockwise from top. Value can be either positive or negative.
         start_angle=0,
         -- "end_angle" is the ending angle of the ring, in degrees, clockwise from top. Value can be either positive or negative, but must be larger than start_angle.
         end_angle=360
     },
     {
         name='time',
         arg='%M.%S',
         max=60,
         bg_colour=0xffffff,
         bg_alpha=0.1,
         fg_colour=0x4EC6DE,
         fg_alpha=0.4,
         x=100, y=150,
         radius=56,
         thickness=5,
         start_angle=0,
         end_angle=360
     },
     {
         name='time',
         arg='%S',
         max=60,
         bg_colour=0xffffff,
         bg_alpha=0.1,
         fg_colour=0x4EC6DE,
         fg_alpha=0.6,
         x=100, y=150,
         radius=62,
         thickness=5,
         start_angle=0,
         end_angle=360
     },
     {
         name='time',
         arg='%d',
         max=31,
         bg_colour=0xffffff,
         bg_alpha=0.1,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=100, y=150,
         radius=70,
         thickness=5,
         start_angle=-90,
         end_angle=90
     },
     {
         name='time',
         arg='%m',
         max=12,
         bg_colour=0xffffff,
         bg_alpha=0.1,
         fg_colour=0x4EC6DE,
         fg_alpha=1,
         x=100, y=150,
         radius=76,
         thickness=5,
         start_angle=-90,
         end_angle=90
     },
     {
         name='cpu',
         arg='cpu1',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=120, y=270,
         radius=30,
         thickness=5,
         start_angle=-80,
         end_angle=160
     },
         {
         name='cpu',
         arg='cpu0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=120, y=270,
         radius=45,
         thickness=5,
         start_angle=-100,
         end_angle=200
     },
     {
         name='memperc',
         arg='',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=40, y=330,
         radius=35,
         thickness=5,
         start_angle=-120,
         end_angle=180
     },
     {
         name='acpitemp',
         arg='',
         max=212,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=100, y=390,
         radius=30,
         thickness=5,
         start_angle=-100,
         end_angle=180
     },
     {
         name='fs_used_perc',
         arg='/',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=30, y=455,
         radius=25,
         thickness=5,
         start_angle=-90,
         end_angle=180
     },
     {
         name='fs_used_perc',
         arg='/home',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=90, y=455,
         radius=25,
         thickness=5,
         start_angle=-90,
         end_angle=180
     },
         {
         name='battery_percent',
         arg='C23B',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=150, y=455,
         radius=25,
         thickness=5,
         start_angle=-90,
         end_angle=180
     },
         {
         name='downspeedf',
         arg='eth0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=130, y=510,
         radius=25,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
         {
         name='upspeedf',
         arg='eth0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=130, y=510,
         radius=20,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
             {
         name='downspeedf',
         arg='wlp16s0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=50, y=510,
         radius=25,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
         {
         name='upspeedf',
         arg='wlp16s0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=50, y=510,
         radius=20,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
     {
         name='wireless_link_qual',
         arg='wlp16s0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=90, y=560,
         radius=25,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
         {
         name='wireless_link_qual',
         arg='wlp16s0',
         max=100,
         bg_colour=0xffffff,
         bg_alpha=0.2,
         fg_colour=0x4EC6DE,
         fg_alpha=0.8,
         x=90, y=560,
         radius=20,
         thickness=4,
         start_angle=-90,
         end_angle=180
     },
 }
 
 -- Use these settings to define the origin and extent of your clock.
 
 clock_r=65
 
 -- "clock_x" and "clock_y" are the coordinates of the centre of the clock, in pixels, from the top left of the Conky window.
 
 clock_x=100
 clock_y=150
 
 show_seconds=true
 
 require 'cairo'
 
 function rgb_to_r_g_b(colour,alpha)
     return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
 end
 
 function draw_ring(cr,t,pt)
     local w,h=conky_window.width,conky_window.height
 
     local xc,yc,ring_r,ring_w,sa,ea=pt['x'],pt['y'],pt['radius'],pt['thickness'],pt['start_angle'],pt['end_angle']
     local bgc, bga, fgc, fga=pt['bg_colour'], pt['bg_alpha'], pt['fg_colour'], pt['fg_alpha']
 
     local angle_0=sa*(2*math.pi/360)-math.pi/2
     local angle_f=ea*(2*math.pi/360)-math.pi/2
     local t_arc=t*(angle_f-angle_0)
 
     -- Draw background ring
 
     cairo_arc(cr,xc,yc,ring_r,angle_0,angle_f)
     cairo_set_source_rgba(cr,rgb_to_r_g_b(bgc,bga))
     cairo_set_line_width(cr,ring_w)
     cairo_stroke(cr)
 
     -- Draw indicator ring
 
     cairo_arc(cr,xc,yc,ring_r,angle_0,angle_0+t_arc)
     cairo_set_source_rgba(cr,rgb_to_r_g_b(fgc,fga))
     cairo_stroke(cr)
 end
 
 function draw_clock_hands(cr,xc,yc)
     local secs,mins,hours,secs_arc,mins_arc,hours_arc
     local xh,yh,xm,ym,xs,ys
 
     secs=os.date("%S")
     mins=os.date("%M")
     hours=os.date("%I")
 
     secs_arc=(2*math.pi/60)*secs
     mins_arc=(2*math.pi/60)*mins+secs_arc/60
     hours_arc=(2*math.pi/12)*hours+mins_arc/12
 
     -- Draw hour hand
 
     xh=xc+0.7*clock_r*math.sin(hours_arc)
     yh=yc-0.7*clock_r*math.cos(hours_arc)
     cairo_move_to(cr,xc,yc)
     cairo_line_to(cr,xh,yh)
 
     cairo_set_line_cap(cr,CAIRO_LINE_CAP_ROUND)
     cairo_set_line_width(cr,5)
     cairo_set_source_rgba(cr,1.0,1.0,1.0,1.0)
     cairo_stroke(cr)
 
     -- Draw minute hand
 
     xm=xc+clock_r*math.sin(mins_arc)
     ym=yc-clock_r*math.cos(mins_arc)
     cairo_move_to(cr,xc,yc)
     cairo_line_to(cr,xm,ym)
 
     cairo_set_line_width(cr,3)
     cairo_stroke(cr)
 
     -- Draw seconds hand
 
     if show_seconds then
         xs=xc+clock_r*math.sin(secs_arc)
         ys=yc-clock_r*math.cos(secs_arc)
         cairo_move_to(cr,xc,yc)
         cairo_line_to(cr,xs,ys)
 
         cairo_set_line_width(cr,1)
         cairo_stroke(cr)
     end
 end
 
 function conky_clock_rings()
     local function setup_rings(cr,pt)
         local str=''
         local value=0
 
         str=string.format('${%s %s}',pt['name'],pt['arg'])
         str=conky_parse(str)
 
         value=tonumber(str)
         pct=value/pt['max']
 
         draw_ring(cr,pct,pt)
     end
 
     -- Check that Conky has been running for at least 5s
 
     if conky_window==nil then return end
     local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
 
     local cr=cairo_create(cs)
 
     local updates=conky_parse('${updates}')
     update_num=tonumber(updates)
 
     if update_num>5 then
         for i in pairs(settings_table) do
             setup_rings(cr,settings_table[i])
         end
     end
 
     draw_clock_hands(cr,clock_x,clock_y)
 end