2 Ring Meters by londonali1010 (2009)
4 This script draws percentage meters as rings. It is fully customisable; all options are described in the script.
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.
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
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)
21 -- Edit this table to customise your rings.
22 -- You can create more rings simply by adding more elements to settings_table.
23 -- "name" is the type of stat to display; you can choose from 'cpu', 'memperc', 'fs_used_perc', 'battery_used_perc'.
25 -- "arg" is the argument to the stat type, e.g. if in Conky you would write ${cpu cpu0}, 'cpu0' would be the argument. If you would not use an argument in the Conky variable, use ''.
27 -- "max" is the maximum value of the ring. If the Conky variable outputs a percentage, use 100.
29 -- "bg_colour" is the colour of the base ring.
31 -- "bg_alpha" is the alpha value of the base ring.
33 -- "fg_colour" is the colour of the indicator part of the ring.
35 -- "fg_alpha" is the alpha value of the indicator part of the ring.
37 -- "x" and "y" are the x and y coordinates of the centre of the ring, relative to the top left corner of the Conky window.
39 -- "radius" is the radius of the ring.
41 -- "thickness" is the thickness of the ring, centred around the radius.
43 -- "start_angle" is the starting angle of the ring, in degrees, clockwise from top. Value can be either positive or negative.
45 -- "end_angle" is the ending angle of the ring, in degrees, clockwise from top. Value can be either positive or negative, but must be larger (e.g. more clockwise) than start_angle.
91 name='battery_percent',
178 function rgb_to_r_g_b(colour,alpha)
179 return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
182 function draw_ring(cr,t,pt)
183 local w,h=conky_window.width,conky_window.height
185 local xc,yc,ring_r,ring_w,sa,ea=pt['x'],pt['y'],pt['radius'],pt['thickness'],pt['start_angle'],pt['end_angle']
186 local bgc, bga, fgc, fga=pt['bg_colour'], pt['bg_alpha'], pt['fg_colour'], pt['fg_alpha']
188 local angle_0=sa*(2*math.pi/360)-math.pi/2
189 local angle_f=ea*(2*math.pi/360)-math.pi/2
190 local t_arc=t*(angle_f-angle_0)
192 -- Draw background ring
194 cairo_arc(cr,xc,yc,ring_r,angle_0,angle_f)
195 cairo_set_source_rgba(cr,rgb_to_r_g_b(bgc,bga))
196 cairo_set_line_width(cr,ring_w)
199 -- Draw indicator ring
201 cairo_arc(cr,xc,yc,ring_r,angle_0,angle_0+t_arc)
202 cairo_set_source_rgba(cr,rgb_to_r_g_b(fgc,fga))
206 function conky_ring_stats()
207 local function setup_rings(cr,pt)
211 str=string.format('${%s %s}',pt['name'],pt['arg'])
215 if value == nil then value = 0 end
221 if conky_window==nil then return end
222 local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
224 local cr=cairo_create(cs)
226 local updates=conky_parse('${updates}')
227 update_num=tonumber(updates)
230 for i in pairs(settings_table) do
231 setup_rings(cr,settings_table[i])
234 cairo_surface_destroy(cs)