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conky.lua

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  1. --[[
  2. Ring Meters by londonali1010 (2009)
  3.  
  4. This script draws percentage meters as rings. It is fully customisable; all options are described in the script.
  5.  
  6. 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.
  7.  
  8. To call this script in Conky, use the following (assuming that you save this script to ~/scripts/rings.lua):
  9.     lua_load ~/scripts/rings-v1.2.1.lua
  10.     lua_draw_hook_pre ring_stats
  11.  
  12. Changelog:
  13. + v1.2.1 -- Fixed minor bug that caused script to crash if conky_parse() returns a nil value (20.10.2009)
  14. + v1.2 -- Added option for the ending angle of the rings (07.10.2009)
  15. + v1.1 -- Added options for the starting angle of the rings, and added the "max" variable, to allow for variables that output a numerical value rather than a percentage (29.09.2009)
  16. + v1.0 -- Original release (28.09.2009)
  17. ]]
  18.  
  19. conky_background_color = 0x151515
  20. conky_background_alpha = 0
  21.  
  22. ring_background_color = 0x424242
  23. ring_background_alpha = 0.9
  24. ring_foreground_color = 0x86c113
  25. ring_foreground_color2 = 0x1994d1
  26. ring_foreground_color3 = 0xaa0000
  27. ring_foreground_alpha = 1
  28.  
  29. settings_table = {
  30.     {
  31.         name='time',
  32.         arg='%S',
  33.         max=60,
  34.         bg_colour=ring_background_color,
  35.         bg_alpha=ring_background_alpha,
  36.         fg_colour=ring_foreground_color,
  37.         fg_alpha=ring_foreground_alpha,
  38.         x=191, y=145,
  39.         radius=40,
  40.         thickness=12,
  41.         start_angle=0,
  42.         end_angle=360
  43.     },
  44.     {
  45.         name='time',
  46.         arg='%I.%M',
  47.         max=12,
  48.         bg_colour=ring_background_color,
  49.         bg_alpha=ring_background_alpha,
  50.         fg_colour=ring_foreground_color2,
  51.         fg_alpha=ring_foreground_alpha,
  52.         x=191, y=145,
  53.         radius=50,
  54.         thickness=5,
  55.         start_angle=-140,
  56.         end_angle=-30
  57.     },
  58.     {
  59.         name='time',
  60.         arg='%M.%S',
  61.         max=60,
  62.         bg_colour=ring_background_color,
  63.         bg_alpha=ring_background_alpha,
  64.         fg_colour=ring_foreground_color,
  65.         fg_alpha=ring_foreground_alpha,
  66.         x=191, y=145,
  67.         radius=50,
  68.         thickness=5,
  69.         start_angle=30,
  70.         end_angle=140
  71.     },
  72.     {
  73.         name='cpu',
  74.         arg='cpu0',
  75.         max=100,
  76.         bg_colour=ring_background_color,
  77.         bg_alpha=ring_background_alpha,
  78.         fg_colour=ring_foreground_color,
  79.         fg_alpha=ring_foreground_alpha,
  80.         x=140, y=300,
  81.         radius=26,
  82.         thickness=5,
  83.         start_angle=-90,
  84.         end_angle=180
  85.     },
  86.     {
  87.         name='memperc',
  88.         arg='',
  89.         max=100,
  90.         bg_colour=ring_background_color,
  91.         bg_alpha=ring_background_alpha,
  92.         fg_colour=ring_foreground_color,
  93.         fg_alpha=ring_foreground_alpha,
  94.         x=170, y=350,
  95.         radius=26,
  96.         thickness=5,
  97.         start_angle=-90,
  98.         end_angle=180
  99.     },
  100.     {
  101.         name='swapperc',
  102.         arg='',
  103.         max=100,
  104.         bg_colour=ring_background_color,
  105.         bg_alpha=ring_background_alpha,
  106.         fg_colour=ring_foreground_color2,
  107.         fg_alpha=ring_foreground_alpha,
  108.         x=170, y=350,
  109.         radius=20,
  110.         thickness=5,
  111.         start_angle=-90,
  112.         end_angle=180
  113.     },
  114.     {
  115.         name='fs_used_perc',
  116.         arg='/',
  117.         max=100,
  118.         bg_colour=ring_background_color,
  119.         bg_alpha=ring_background_alpha,
  120.         fg_colour=ring_foreground_color2,
  121.         fg_alpha=ring_foreground_alpha,
  122.         x=260, y=503,
  123.         radius=20,
  124.         thickness=5,
  125.         start_angle=-90,
  126.         end_angle=180
  127.     },
  128.     {
  129.         name='fs_used_perc',
  130.         arg='/media/Bagy/',
  131.         max=100,
  132.         bg_colour=ring_background_color,
  133.         bg_alpha=ring_background_alpha,
  134.         fg_colour=ring_foreground_color,
  135.         fg_alpha=ring_foreground_alpha,
  136.         x=260, y=503,
  137.         radius=26,
  138.         thickness=5,
  139.         start_angle=-90,
  140.         end_angle=180
  141.     },
  142.     {
  143.         name='upspeedf',
  144.         arg='eth0',
  145.         max=200,
  146.         bg_colour=ring_background_color,
  147.         bg_alpha=ring_background_alpha,
  148.         fg_colour=ring_foreground_color2,
  149.         fg_alpha=ring_foreground_alpha,
  150.         x=230, y=452,
  151.         radius=20,
  152.         thickness=5,
  153.         start_angle=-90,
  154.         end_angle=180
  155.     },
  156.     {
  157.         name='downspeedf',
  158.         arg='eth0',
  159.         max=800,
  160.         bg_colour=ring_background_color,
  161.         bg_alpha=ring_background_alpha,
  162.         fg_colour=ring_foreground_color,
  163.         fg_alpha=ring_foreground_alpha,
  164.         x=230, y=452,
  165.         radius=26,
  166.         thickness=5,
  167.         start_angle=-90,
  168.         end_angle=180
  169.     },
  170.     {
  171.         name='hwmon temp 1',
  172.         arg='',
  173.         max=100,
  174.         bg_colour=ring_background_color,
  175.         bg_alpha=ring_background_alpha,
  176.         fg_colour=ring_foreground_color3,
  177.         fg_alpha=ring_foreground_alpha,
  178.         x=200, y=401,
  179.         radius=26,
  180.         thickness=6,
  181.         start_angle=-90,
  182.         end_angle=180
  183.     },
  184. }
  185.  
  186. require 'cairo'
  187.  
  188. function rgb_to_r_g_b(colour,alpha)
  189.     return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
  190. end
  191.  
  192. function draw_ring(cr,t,pt)
  193.     local w,h=conky_window.width,conky_window.height
  194.  
  195.     local xc,yc,ring_r,ring_w,sa,ea=pt['x'],pt['y'],pt['radius'],pt['thickness'],pt['start_angle'],pt['end_angle']
  196.     local bgc, bga, fgc, fga=pt['bg_colour'], pt['bg_alpha'], pt['fg_colour'], pt['fg_alpha']
  197.  
  198.     local angle_0=sa*(2*math.pi/360)-math.pi/2
  199.     local angle_f=ea*(2*math.pi/360)-math.pi/2
  200.     local t_arc=t*(angle_f-angle_0)
  201.  
  202.     -- Draw background ring
  203.  
  204.     cairo_arc(cr,xc,yc,ring_r,angle_0,angle_f)
  205.     cairo_set_source_rgba(cr,rgb_to_r_g_b(bgc,bga))
  206.     cairo_set_line_width(cr,ring_w)
  207.     cairo_stroke(cr)
  208.  
  209.     -- Draw indicator ring
  210.  
  211.     cairo_arc(cr,xc,yc,ring_r,angle_0,angle_0+t_arc)
  212.     cairo_set_source_rgba(cr,rgb_to_r_g_b(fgc,fga))
  213.     cairo_stroke(cr)        
  214. end
  215.  
  216. function conky_ring_stats()
  217.     local function setup_rings(cr,pt)
  218.         local str=''
  219.         local value=0
  220.  
  221.         str=string.format('${%s %s}',pt['name'],pt['arg'])
  222.         str=conky_parse(str)
  223.  
  224.         value=tonumber(str)
  225.         if value == nil then value = 0 end
  226.         pct=value/pt['max']
  227.  
  228.         draw_ring(cr,pct,pt)
  229.     end
  230.  
  231.     if conky_window==nil then return end
  232.     local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
  233.  
  234.     local cr=cairo_create(cs)    
  235.  
  236.     local updates=conky_parse('${updates}')
  237.     update_num=tonumber(updates)
  238.  
  239.     if update_num>5 then
  240.         for i in pairs(settings_table) do
  241.             setup_rings(cr,settings_table[i])
  242.         end
  243.     end
  244. end
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