--- /dev/null
+--[[ GRAPH widget v1.0 by wlourf (31.10.2010)
+ this widget draws some graphs with some effects
+ http://u-scripts.blogspot.com/2010/10/graph-widget.html
+
+To call the script in a conky, use, before TEXT
+ lua_load /path/to/the/script/graph.lua
+ lua_draw_hook_pre main_graph
+and add one line (blank or not) after TEXT
+
+
+Parameters are :
+3 parameters are mandatory
+name - the name of the conky variable to display,
+ for example for {$cpu cpu0}, just write name="cpu"
+arg - the argument of the above variable,
+ for example for {$cpu cpu1}, just write arg="cpu1"
+ arg can be a numerical value if name=""
+max - the maximum value the above variable can reach,
+ for example for {$cpu cpu1}, just write max=100 or less or more
+
+Optional parameters:
+x,y - coordinates of the bottom-left corner of the graph,
+ relative to the top-left corner of the conky window
+ default = bottom-left corner of the conky window
+width - width of the graph, default = 100 pixels
+height - height of the graph, default = 20 pixels
+nb_values - number of values to display in the graph, default=width
+ i.e. 1 pixel for 1 value
+autoscale - if set to true, calculate the max valeu of the y axis and
+ doesn't use the max parameter above, default=false
+skew_x - skew graph around x axis, défaut = 0
+skew_y - skew graph around y axis, défaut = 0
+angle - angle of rotation of the graph in degress, default = 0
+ i.e. a horizontal graph)
+inverse - if set to true, graph are draw from right to left, default=false
+background - if set to false, background is not drawn, default=true
+foreground - if set to false, foreground is not drawn, default=true
+ foreground = plain graph
+bg_bd_size - size of the border of the background, default=0=no border
+fg_bd_size - size of the border of the foreground, default=0=no border
+
+
+Colours tables below are defined into braces :
+{position in the gradient (0 to 1), colour in hexadecimal, alpha (0 to 1)}
+example for a single colour table :
+{{0,0xFFAA00,1}} position parameter doesn't matter
+example for a two-colours table :
+{{0,0xFFAA00,1},{1,0x00AA00,1}} or {{0.5,0xFFAA00,1},{1,0x00AA00,1}}
+example for a three-colours table :
+{{0,0xFFAA00,1},{0.5,0xFF0000,1},{1,0x00AA00,1}}
+
+bg_colour - colour table for background,
+ default = {{0,0x000000,.5},{1,0xFFFFFF,.5}}
+fg_colour - colour table for foreground,
+ default = {{0,0x00FFFF,1},{1,0x0000FF,1}}
+bg_bd_colour- colour table for background border,
+ default = {{1,0xFFFFFF,1}}
+fg_bd_colour- colour table for foreground border,
+ default = {{1,0xFFFF00,1}}
+
+bg_orientation, bg_bd_orientation, fg_orientation, fg_bd_orientation,
+ - "orientation" defines the starting point of the gradient,
+ default="nn"
+ there are 8 available starting points :
+ "nw","nn","ne","ee","se","ss","sw","ww"
+ (n for north, w for west ...)
+ theses 8 points are the 4 corners + the 4 middles of graph
+ so a gradient "nn" will go from "nn" to "ss"
+ a gradient "nw" will go from "nw" to "se"
+
+
+v1.0 (31 Oct. 2010) original release
+
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation version 3 (GPLv3)
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+-- MA 02110-1301, USA.
+
+]]
+
+require 'cairo'
+
+function set_settings()
+ graph_settings={
+ {
+ name="cpu",
+ arg="",
+ max=100,
+ y=87,
+ x=5,
+ autoscale=false,
+ width=215,
+ height=29,
+ nb_values=120,
+ fg_bd_size=2,
+ bg_colour = {{0,0x007AF6,0},{1,0x000000,0}},
+ --fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFFA209,1},{1,0xFFFF00,1}},
+ fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFF3300,1},{1,0xFFFFFF,1}},
+ --fg_colour = { {0,0xFF0000,1},{0.5,0xFFA209,1},{1,0xFFFF00,1}},
+ fg_colour = { {0,0x00CCFF,0.7},{0.5,0x0000FF,0.7},{1,0x000000,0.1}},
+ foreground=true,
+ fg_orientation="ne",
+ bg_bd_orientation="nn",
+ bg_orientation="ne",
+ },
+ {
+ name="upspeedf",
+ arg="wlan0",
+ max=9999,
+ y=233,
+ x=5,
+ autoscale=true,
+ width=275,
+ height=35,
+ nb_values=120,
+ fg_bd_size=1,
+ bg_colour = {{0,0x007AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFFA209,0.8},{1,0xFFFF00,0.6}},
+ fg_colour = { {0,0xFF0000,0.65},{0.5,0xFFA209,0.5},{1,0xFFFF00,0.3}},
+ foreground=true,
+ inverse=true,
+ DrawMe="${if_up wlan0}1${else}0$endif",
+ bg_orientation="ww",
+ },
+ {
+ name="downspeedf",
+ arg="wlan0",
+ max=9999,
+ y=233,
+ x=525,
+ autoscale=true,
+ width=275,
+ height=35,
+ nb_values=120,
+ fg_bd_size=1,
+ bg_colour = {{0,0x007AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFFA209,0.8},{1,0xFFFF00,0.6}},
+ fg_colour = { {0,0xFF0000,0.65},{0.5,0xFFA209,0.5},{1,0xFFFF00,0.3}},
+ foreground=true,
+ DrawMe="${if_up wlan0}1${else}0$endif",
+ bg_orientation="ee",
+ },
+ {
+ name="upspeedf",
+ arg="gprs0",
+ max=9999,
+ y=233,
+ x=5,
+ autoscale=true,
+ width=275,
+ height=35,
+ nb_values=120,
+ fg_bd_size=1,
+ bg_colour = {{0,0x007AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFFA209,0.8},{1,0xFFFF00,0.6}},
+ fg_colour = { {0,0xFF0000,0.65},{0.5,0xFFA209,0.5},{1,0xFFFF00,0.3}},
+ foreground=true,
+ inverse=true,
+ DrawMe="${if_up gprs0}1${else}0$endif",
+ bg_orientation="ww",
+ },
+ {
+ name="downspeedf",
+ arg="gprs0",
+ max=9999,
+ y=233,
+ x=525,
+ autoscale=true,
+ width=275,
+ height=35,
+ nb_values=120,
+ fg_bd_size=1,
+ bg_colour = {{0,0x007AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xFF0000,1},{0.5,0xFFA209,0.8},{1,0xFFFF00,0.6}},
+ fg_colour = { {0,0xFF0000,0.65},{0.5,0xFFA209,0.5},{1,0xFFFF00,0.3}},
+ foreground=true,
+ DrawMe="${if_up gprs0}1${else}0$endif",
+ bg_orientation="ee",
+ },
+ {
+ name="loadavg",
+ arg="1",
+ max=20,
+ y=95,
+ x=372,
+ autoscale=true,
+ width=140,
+ height=36,
+ nb_values=100,
+ fg_bd_size=0,
+ bg_colour = {{0,0x667AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xdd0000,0.7},{0.5,0xdddd00,0.7},{1,0xFFFF00,0.7}},
+ fg_colour = { {0,0x000000,0.7},{0.5,0xdd0000,0.7},{1,0xff0000,0.7}},
+ foreground=true,
+ },
+ {
+ name="to_bytes ${diskio",
+ arg="mmcblk0}",
+ max=2500000,
+ y=187,
+ x=640,
+ autoscale=true,
+ width=160,
+ height=89,
+ nb_values=130,
+ fg_bd_size=0,
+ bg_colour = {{0,0x667AF6,0},{1,0x000000,0}},
+ fg_bd_colour = { {0,0xdd0000,1},{0.5,0xdddd00,1},{1,0xFFFF00,1}},
+ fg_colour = { {1,0x111111,0.3},{0.5,0x33cc00,0.6},{0,0x00FF00,0.8}},
+ foreground=true,
+ bg_orientation="ne",
+ fg_orientation="ee",
+ },
+ }
+end
+
+function check_settings(t)
+ --tables are check only when conky start
+ if t.name==nil and t.arg==nil then
+ print ("No input values ... use parameters 'name'" ..
+ " with 'arg' or only parameter 'arg' ")
+ return 1
+ end
+ if t.max==nil then
+ print ("No maximum value defined, use 'max'")
+ print ("for name=" .. t.name .. " with arg=" .. t.arg)
+ return 1
+ end
+ if t.name==nil then t.name="" end
+ if t.arg==nil then t.arg="" end
+ return 0
+end
+
+function conky_main_graph()
+ if conky_window == nil then return end
+ local w=conky_window.width
+ local h=conky_window.height
+ local cs=cairo_xlib_surface_create(conky_window.display,
+ conky_window.drawable, conky_window.visual, w, h)
+ cr=cairo_create(cs)
+ updates=tonumber(conky_parse('${updates}'))
+ --start drawing after "updates_gap" updates
+ --prevent segmentation error for cpu
+ updates_gap=5
+ if updates==1 then
+ set_settings()
+ flagOK=0
+ for i in pairs(graph_settings) do
+ if graph_settings[i].width==nil then graph_settings[i].width=100 end
+ if graph_settings[i].nb_values==nil then
+ graph_settings[i].nb_values= graph_settings[i].width
+ end
+ --create an empty table to store values
+ graph_settings[i]["values"]={}
+ --beginning point
+ graph_settings[i].beg = graph_settings[i].nb_values
+ --graph_settings[i].beg = 0
+ for j =1, graph_settings[i].nb_values do
+ graph_settings[i].values[j]=0
+ end
+ graph_settings[i].flag_init=true
+ flagOK=flagOK + check_settings(graph_settings[i])
+ end
+ end
+ if flagOK>0 then
+ --abort script if error in one of the tables
+ print ("ERROR : Check the graph_setting table")
+ return
+ end
+ --drawing process
+ if updates > updates_gap then
+ for i in pairs(graph_settings) do
+ if (graph_settings[i].DrawMe==nil or conky_parse(graph_settings[i].DrawMe) == "1") then
+ --print(graph_settings[i].DrawMe.."= '"..conky_parse(graph_settings[i].DrawMe).."'")
+ --return
+ --cancel fetch value from conky if interface down or whatever
+ local nb_values=graph_settings[i].nb_values
+ graph_settings[i].automax=0
+ for j =1, nb_values do
+ if graph_settings[i].values[j+1]==nil then
+ graph_settings[i].values[j+1]=0
+ end
+ graph_settings[i].values[j]=graph_settings[i].values[j+1]
+ if j==nb_values then
+ --store value
+ if graph_settings[i].name=="" then
+ value=graph_settings[i].arg
+ else
+ value=tonumber(conky_parse('${' ..
+ graph_settings[i].name .. " " ..
+ graph_settings[i].arg ..'}'))
+ end
+ graph_settings[i].values[nb_values]=value
+ end
+ graph_settings[i].automax=math.max(graph_settings[i].automax,
+ graph_settings[i].values[j])
+ if graph_settings[i].automax == 0 then graph_settings[i].automax = 1 end --should stop weird glitches at beginning when no values reported yet for upspeed or diskio
+ end
+ draw_graph(graph_settings[i])
+ end
+ end
+ end
+ cairo_destroy(cr)
+ cairo_surface_destroy(cs)
+ updates=nil
+ updates_gap=nil
+end
+
+function draw_graph(t)
+ --drawing function
+ local function rgb_to_r_g_b(colour)
+ return ((colour[2] / 0x10000) % 0x100) / 255., ((colour[2] / 0x100) % 0x100) / 255., (colour[2] % 0x100) / 255., colour[3]
+ end
+
+ local function linear_orientation(o,w,h)
+ --set gradient for bg and bg border
+ local p
+ if o=="nn" then
+ p={w/2,h,w/2,0}
+ elseif o=="ne" then
+ p={w,h,0,0}
+ elseif o=="ww" then
+ p={0,h/2,w,h/2}
+ elseif o=="se" then
+ p={w,0,0,h}
+ elseif o=="ss" then
+ p={w/2,0,w/2,h}
+ elseif o=="ee" then
+ p={w,h/2,0,h/2}
+ elseif o=="sw" then
+ p={0,0,w,h}
+ elseif o=="nw" then
+ p={0,h,w,0}
+ end
+ return p
+ end
+
+ local function linear_orientation_inv(o,w,h)
+ --set gradient for fg and fg border
+ local p
+ if o=="ss" then
+ p={w/2,h,w/2,0}
+ elseif o=="sw" then
+ p={w,h,0,0}
+ elseif o=="ee" then
+ p={0,h/2,w,h/2}
+ elseif o=="nw" then
+ p={w,0,0,h}
+ elseif o=="nn" then
+ p={w/2,0,w/2,h}
+ elseif o=="ww" then
+ p={w,h/2,0,h/2}
+ elseif o=="ne" then
+ p={0,0,w,h}
+ elseif o=="se" then
+ p={0,h,w,0}
+ end
+ return p
+ end
+ if t.DrawMe~=nil and conky_parse(t.DrawMe) ~= "1" then
+ --print(t.DrawMe.."= '"..conky_parse(t.DrawMe).."'")
+ return
+ --else
+ -- print(t.name)
+ end --cancel drawing for same reason as earlier
+ --set default values
+ if t.height==nil then t.height=20 end
+ --checked in previous part : width and nb_values
+ if t.background==nil then t.background=true end
+ if t.bg_bd_size==nil then t.bg_bd_size=0 end
+ if t.x==nil then t.x=t.bg_bd_size end
+ if t.y==nil then t.y=conky_window.height -t.bg_bd_size end
+ if t.bg_colour==nil then t.bg_colour={{0,0x000000,.5},{1,0xFFFFFF,.5}} end
+ if t.bg_bd_colour==nil then t.bg_bd_colour={{1,0xFFFFFF,1}} end
+ if t.foreground==nil then t.foreground=true end
+ if t.fg_colour==nil then t.fg_colour={{0,0x00FFFF,1},{1,0x0000FF,1}} end
+ if t.fg_bd_size==nil then t.fg_bd_size=0 end
+ if t.fg_bd_colour==nil then t.fg_bd_colour={{1,0xFFFF00,1}} end
+ if t.autoscale==nil then t.autoscale=false end
+ if t.inverse==nil then t.inverse=false end
+ if t.angle==nil then t.angle=0 end
+ if t.bg_bd_orientation==nil then t.bg_bd_orientation="nn" end
+ if t.bg_orientation==nil then t.bg_orientation="nn" end
+ if t.fg_bd_orientation==nil then t.fg_bd_orientation="nn" end
+ if t.fg_orientation==nil then t.fg_orientation="nn" end
+ --check colours tables
+ for i=1, #t.fg_colour do
+ if #t.fg_colour[i]~=3 then
+ print ("error in fg_colour table")
+ t.fg_colour[i]={1,0x0000FF,1}
+ end
+ end
+ for i=1, #t.fg_bd_colour do
+ if #t.fg_bd_colour[i]~=3 then
+ print ("error in fg_bd_colour table")
+ t.fg_bd_colour[i]={1,0x00FF00,1}
+ end
+ end
+ for i=1, #t.bg_colour do
+ if #t.bg_colour[i]~=3 then
+ print ("error in background color table")
+ t.bg_colour[i]={1,0xFFFFFF,0.5}
+ end
+ end
+ for i=1, #t.bg_bd_colour do
+ if #t.bg_bd_colour[i]~=3 then
+ print ("error in background border color table")
+ t.bg_bd_colour[i]={1,0xFFFFFF,1}
+ end
+ end
+ --calculate skew parameters if needed
+ if t.flag_init then
+ if t.skew_x == nil then
+ t.skew_x=0
+ else
+ t.skew_x = math.pi*t.skew_x/180
+ end
+ if t.skew_y == nil then
+ t.skew_y=0
+ else
+ t.skew_y = math.pi*t.skew_y/180
+ end
+ t.flag_init=false
+ end
+ cairo_set_line_cap(cr,CAIRO_LINE_CAP_ROUND)
+ cairo_set_line_join(cr,CAIRO_LINE_JOIN_ROUND)
+ local matrix0 = cairo_matrix_t:create()
+ tolua.takeownership(matrix0)
+ cairo_save(cr)
+ cairo_matrix_init (matrix0, 1,t.skew_y,t.skew_x,1,0,0)
+ cairo_transform(cr,matrix0)
+ local ratio=t.width/t.nb_values
+ cairo_translate(cr,t.x,t.y)
+ cairo_rotate(cr,t.angle*math.pi/180)
+ cairo_scale(cr,1,-1)
+ --background
+ if t.background then
+ local pts=linear_orientation(t.bg_orientation,t.width,t.height)
+ local pat = cairo_pattern_create_linear (pts[1],pts[2],pts[3],pts[4])
+ for i=1, #t.bg_colour do
+ --print ("i",i,t.colour[i][1], rgb_to_r_g_b(t.colour[i]))
+ cairo_pattern_add_color_stop_rgba (pat, t.bg_colour[i][1], rgb_to_r_g_b(t.bg_colour[i]))
+ end
+ cairo_set_source (cr, pat)
+ cairo_rectangle(cr,0,0,t.width,t.height)
+ cairo_fill(cr)
+ cairo_pattern_destroy(pat)
+ end
+ --autoscale
+ cairo_save(cr)
+ if t.autoscale then
+ t.max= t.automax*1.1
+ end
+ local scale_x = t.width/(t.nb_values-1)
+ local scale_y = t.height/t.max
+ --define first point of the graph
+ if updates-updates_gap <t.nb_values then
+ t.beg = t.beg - 1
+ --next line prevent segmentation error when conky window is redraw
+ --quicly when another window "fly" over it
+ if t.beg<0 then t.beg=0 end
+ else
+ t.beg=0
+ end
+ if t.inverse then cairo_scale(cr,-1,1)
+ cairo_translate(cr,-t.width,0) end
+ --graph foreground
+ if t.foreground then
+ local pts_fg=linear_orientation_inv(t.fg_orientation,t.width,t.height)
+ local pat = cairo_pattern_create_linear (pts_fg[1],pts_fg[2],pts_fg[3],pts_fg[4])
+ for i=1,#t.fg_colour,1 do
+ cairo_pattern_add_color_stop_rgba (pat, 1-t.fg_colour[i][1], rgb_to_r_g_b(t.fg_colour[i]))
+ end
+ cairo_set_source (cr, pat)
+ cairo_move_to(cr,t.beg*scale_x,0)
+ cairo_line_to(cr,t.beg*scale_x,t.values[t.beg+1]*scale_y)
+ for i=t.beg, t.nb_values-1 do
+ cairo_line_to(cr,i*scale_x,t.values[i+1]*scale_y)
+ end
+ cairo_line_to(cr,(t.nb_values-1)*scale_x,0)
+ cairo_close_path(cr)
+ cairo_fill(cr)
+ cairo_pattern_destroy(pat)
+ end
+ --graph_border
+ if t.fg_bd_size>0 then
+ local pts=linear_orientation_inv(t.fg_bd_orientation,t.width,t.height)
+ local pat = cairo_pattern_create_linear (pts[1],pts[2],pts[3],pts[4])
+ for i=1,#t.fg_bd_colour,1 do
+ cairo_pattern_add_color_stop_rgba (pat, 1-t.fg_bd_colour[i][1], rgb_to_r_g_b(t.fg_bd_colour[i]))
+ end
+ cairo_set_source (cr, pat)
+ cairo_move_to(cr,t.beg*scale_x,t.values[t.beg+1]*scale_y)
+ for i=t.beg, t.nb_values-1 do
+ cairo_line_to(cr,i*scale_x,t.values[i+1]*scale_y)
+ end
+ cairo_set_line_width(cr,t.fg_bd_size)
+ cairo_stroke(cr)
+ cairo_pattern_destroy(pat)
+ end
+ cairo_restore(cr)
+ --background border
+ if t.bg_bd_size>0 then
+ local pts=linear_orientation(t.bg_bd_orientation,t.width,t.height)
+ local pat = cairo_pattern_create_linear (pts[1],pts[2],pts[3],pts[4])
+ for i=1, #t.bg_bd_colour do
+ --print ("i",i,t.colour[i][1], rgb_to_r_g_b(t.colour[i]))
+ cairo_pattern_add_color_stop_rgba (pat, t.bg_bd_colour[i][1], rgb_to_r_g_b(t.bg_bd_colour[i]))
+ end
+ cairo_set_source (cr, pat)
+ cairo_rectangle(cr,0,0,t.width,t.height)
+ cairo_set_line_width(cr,t.bg_bd_size)
+ cairo_stroke(cr)
+ cairo_pattern_destroy(pat)
+ end
+
+ cairo_restore(cr)
+
+end
+
projects / monky / blobdiff