2 Ring Meters by londonali1010 (2009)
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4 This script draws percentage meters as rings. It is fully customisable; all options are described in the script.
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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.
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8 To call this script in Conky, use the following (assuming that you save this script to ~/scripts/rings.lua):
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9 lua_load ~/scripts/rings-v1.2.1.lua
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10 lua_draw_hook_pre ring_stats
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13 + v1.2.1 -- Fixed minor bug that caused script to crash if conky_parse() returns a nil value (20.10.2009)
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14 + v1.2 -- Added option for the ending angle of the rings (07.10.2009)
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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)
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16 + v1.0 -- Original release (28.09.2009)
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21 -- Edit this table to customise your rings.
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22 -- You can create more rings simply by adding more elements to settings_table.
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23 -- "name" is the type of stat to display; you can choose from 'cpu', 'memperc', 'fs_used_perc', 'battery_used_perc'.
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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 ''.
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27 -- "max" is the maximum value of the ring. If the Conky variable outputs a percentage, use 100.
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29 -- "bg_colour" is the colour of the base ring.
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31 -- "bg_alpha" is the alpha value of the base ring.
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33 -- "fg_colour" is the colour of the indicator part of the ring.
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35 -- "fg_alpha" is the alpha value of the indicator part of the ring.
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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.
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39 -- "radius" is the radius of the ring.
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41 -- "thickness" is the thickness of the ring, centred around the radius.
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43 -- "start_angle" is the starting angle of the ring, in degrees, clockwise from top. Value can be either positive or negative.
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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.
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91 name='battery_percent',
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108 bg_colour=0xffffff,
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110 fg_colour=0xffffff,
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122 bg_colour=0xffffff,
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124 fg_colour=0xffffff,
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136 bg_colour=0xffffff,
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138 fg_colour=0xffffff,
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147 name='fs_used_perc',
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150 bg_colour=0xffffff,
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152 fg_colour=0xffffff,
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161 name='fs_used_perc',
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164 bg_colour=0xffffff,
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166 fg_colour=0xffffff,
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178 function rgb_to_r_g_b(colour,alpha)
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179 return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
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182 function draw_ring(cr,t,pt)
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183 local w,h=conky_window.width,conky_window.height
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185 local xc,yc,ring_r,ring_w,sa,ea=pt['x'],pt['y'],pt['radius'],pt['thickness'],pt['start_angle'],pt['end_angle']
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186 local bgc, bga, fgc, fga=pt['bg_colour'], pt['bg_alpha'], pt['fg_colour'], pt['fg_alpha']
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188 local angle_0=sa*(2*math.pi/360)-math.pi/2
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189 local angle_f=ea*(2*math.pi/360)-math.pi/2
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190 local t_arc=t*(angle_f-angle_0)
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192 -- Draw background ring
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194 cairo_arc(cr,xc,yc,ring_r,angle_0,angle_f)
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195 cairo_set_source_rgba(cr,rgb_to_r_g_b(bgc,bga))
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196 cairo_set_line_width(cr,ring_w)
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199 -- Draw indicator ring
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201 cairo_arc(cr,xc,yc,ring_r,angle_0,angle_0+t_arc)
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202 cairo_set_source_rgba(cr,rgb_to_r_g_b(fgc,fga))
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206 function conky_ring_stats()
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207 local function setup_rings(cr,pt)
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211 str=string.format('${%s %s}',pt['name'],pt['arg'])
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212 str=conky_parse(str)
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214 value=tonumber(str)
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215 if value == nil then value = 0 end
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216 pct=value/pt['max']
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218 draw_ring(cr,pct,pt)
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221 if conky_window==nil then return end
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222 local cs=cairo_xlib_surface_create(conky_window.display,conky_window.drawable,conky_window.visual, conky_window.width,conky_window.height)
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224 local cr=cairo_create(cs)
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226 local updates=conky_parse('${updates}')
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227 update_num=tonumber(updates)
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229 if update_num>5 then
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230 for i in pairs(settings_table) do
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231 setup_rings(cr,settings_table[i])
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234 cairo_surface_destroy(cs)
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