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legacy-dotfiles/.conky_box.lua
Tom Willemsen ae8e4f299f .conky_box.lua
2012-10-11 21:30:09 +02:00

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Lua
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--[[BOX WIDGET v1.1 by Wlourf 27/01/2011
This widget can drawn some boxes, even circles in your conky window
http://u-scripts.blogspot.com/2011/01/box-widget.html)
Inspired by Background by londonali1010 (2009), thanks ;-)
The parameters (all optionals) are :
x - x coordinate of top-left corner of the box, default = 0 = (top-left corner of conky window)
y - y coordinate of top-left corner of the box, default = 0 = (top-left corner of conky window)
w - width of the box, default = width of the conky window
h - height of the box, default = height of the conky window
corners - corners is a table for the four corners in this order : top-left, top-right,bottom-right, bottom-left
each corner is defined in a table with a shape and a radius, available shapes are : "curve","circle","line"
example for the same shapes for all corners:
{ {"circle",10} }
example for first corner different from the three others
{ {"circle",10}, {"circle",5} }
example for top corners differents from bottom corners
{ {"circle",10}, {"circle",10}, {"line",0} }
default = { {"line",0} } i.e=no corner
operator - set the compositing operator (needs in the conkyrc : own_window_argb_visual yes)
see http://cairographics.org/operators/
available operators are :
"clear","source","over","in","out","atop","dest","dest_over","dest_in","dest_out","dest_atop","xor","add","saturate"
default = "over"
border - if border>0, the script draws only the border, like a frame, default=0
dash - if border>0 and dash>0, the border is draw with dashes, default=0
skew_x - skew box around x axis, default = 0
skew_y - skew box around y axis, default = 0
scale_x - rescale the x axis, default=1, useful for drawing elipses ...
scale_y - rescale the x axis, default=1
angle - angle of rotation of the box in degrees, default = 0
i.e. a horizontal graph
rot_x - x point of rotation's axis, default = 0,
relative to top-left corner of the box, (not the conky window)
rot_y - y point of rotation's axis, default = 0
relative to top-left corner of the box, (not the conky window)
draw_me - if set to false, box is not drawn (default = true or 1)
it can be used with a conky string, if the string returns 1, the box is drawn :
example : "${if_empty ${wireless_essid wlan0}}${else}1$endif",
linear_gradient - table with the coordinates of two points to define a linear gradient,
points are relative to top-left corner of the box, (not the conky window)
{x1,y1,x2,y2}
radial_gradient - table with the coordinates of two circle to define a radial gradient,
points are relative to top-left corner of the box, (not the conky window)
{x1,y1,r1,x2,y2,r2} (r=radius)
colour - table of colours, default = plain white {{1,0xFFFFFF,0.5}}
this table contains one or more tables with format {P,C,A}
P=position of gradient (0 = start of the gradient, 1= end of the gradient)
C=hexadecimal colour
A=alpha (opacity) of color (0=invisible,1=opacity 100%)
Examples :
for a plain color {{1,0x00FF00,0.5}}
for a gradient with two colours {{0,0x00FF00,0.5},{1,0x000033,1}} {x=80,y=150,w=20,h=20,
radial_gradient={20,20,0,20,20,20},
colour={{0.5,0xFFFFFF,1},{1,0x000000,0}},
or {{0.5,0x00FF00,1},{1,0x000033,1}} -with this one, gradient will start in the middle
for a gradient with three colours {{0,0x00FF00,0.5},{0.5,0x000033,1},{1,0x440033,1}}
and so on ...
To call this script in Conky, use (assuming you have saved this script to ~/scripts/):
lua_load ~/scripts/box.lua
lua_draw_hook_pre main_box
And leave one line blank or not after TEXT
Changelog:
+ v1.0 -- Original release (19.12.2010)
+ v1.1 -- Adding parameters: operator, dash, angle, skew_x, skew_y, draw_me
corners are described in a table
-- 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 conky_main_box()
if conky_window==nil then return end
---------------------- PARAMETERS BEGIN HERE
local boxes_settings={
{
x = conky_window.text_start_x - 10,
y = conky_window.text_start_y - 10,
w = conky_window.text_width + 20,
h = conky_window.text_height + 20,
colour = {{1,0x000000,0.4}},
},
}
---------------------------- PARAMETERS END HERE
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)
if tonumber(conky_parse("$updates"))<5 then return end
for i in pairs(boxes_settings) do
draw_box (cr,boxes_settings[i])
end
cairo_destroy(cr)
cairo_surface_destroy(cs)
end
function draw_box(cr,t)
if t.draw_me == true then t.draw_me = nil end
if t.draw_me ~= nil and conky_parse(tostring(t.draw_me)) ~= "1" then return end
local table_corners={"circle","curve","line"}
local t_operators={
clear = CAIRO_OPERATOR_CLEAR,
source = CAIRO_OPERATOR_SOURCE,
over = CAIRO_OPERATOR_OVER,
["in"] = CAIRO_OPERATOR_IN,
out = CAIRO_OPERATOR_OUT,
atop = CAIRO_OPERATOR_ATOP,
dest = CAIRO_OPERATOR_DEST,
dest_over = CAIRO_OPERATOR_DEST_OVER,
dest_in = CAIRO_OPERATOR_DEST_IN,
dest_out = CAIRO_OPERATOR_DEST_OUT,
dest_atop = CAIRO_OPERATOR_DEST_ATOP,
xor = CAIRO_OPERATOR_XOR,
add = CAIRO_OPERATOR_ADD,
saturate = CAIRO_OPERATOR_SATURATE,
}
function rgba_to_r_g_b_a(tc)
--tc={position,colour,alpha}
local colour = tc[2]
local alpha = tc[3]
return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
end
function table.copy(t)
local t2 = {}
for k,v in pairs(t) do
t2[k] = {v[1],v[2]}
end
return t2
end
function draw_corner(num,t)
local shape=t[1]
local radius=t[2]
local x,y = t[3],t[4]
if shape=="line" then
if num == 1 then cairo_line_to(cr,radius,0)
elseif num == 2 then cairo_line_to(cr,x,radius)
elseif num == 3 then cairo_line_to(cr,x-radius,y)
elseif num == 4 then cairo_line_to(cr,0,y-radius)
end
end
if shape=="circle" then
local PI = math.pi
if num == 1 then cairo_arc(cr,radius,radius,radius,-PI,-PI/2)
elseif num == 2 then cairo_arc(cr,x-radius,y+radius,radius,-PI/2,0)
elseif num == 3 then cairo_arc(cr,x-radius,y-radius,radius,0,PI/2)
elseif num == 4 then cairo_arc(cr,radius,y-radius,radius,PI/2,-PI)
end
end
if shape=="curve" then
if num == 1 then cairo_curve_to(cr,0,radius ,0,0 ,radius,0)
elseif num == 2 then cairo_curve_to(cr,x-radius,0, x,y, x,radius)
elseif num == 3 then cairo_curve_to(cr,x,y-radius, x,y, x-radius,y)
elseif num == 4 then cairo_curve_to(cr,radius,y, x,y, 0,y-radius)
end
end
end
--check values and set default values
if t.x == nil then t.x = 0 end
if t.y == nil then t.y = 0 end
if t.w == nil then t.w = conky_window.width end
if t.h == nil then t.h = conky_window.height end
if t.radius == nil then t.radius = 0 end
if t.border == nil then t.border = 0 end
if t.colour==nil then t.colour={{1,0xFFFFFF,0.5}} end
if t.linear_gradient ~= nil then
if #t.linear_gradient ~= 4 then
t.linear_gradient = {t.x,t.y,t.width,t.height}
end
end
if t.angle==nil then t.angle = 0 end
if t.skew_x == nil then t.skew_x=0 end
if t.skew_y == nil then t.skew_y=0 end
if t.scale_x==nil then t.scale_x=1 end
if t.scale_y==nil then t.scale_y=1 end
if t.rot_x == nil then t.rot_x=0 end
if t.rot_y == nil then t.rot_y=0 end
if t.operator == nil then t.operator = "over" end
if (t_operators[t.operator]) == nil then
print ("wrong operator :",t.operator)
t.operator = "over"
end
if t.radial_gradient ~= nil then
if #t.radial_gradient ~= 6 then
t.radial_gradient = {t.x,t.y,0, t.x,t.y, t.width}
end
end
for i=1, #t.colour do
if #t.colour[i]~=3 then
print ("error in color table")
t.colour[i]={1,0xFFFFFF,1}
end
end
if t.corners == nil then t.corners={ {"line",0} } end
local t_corners = {}
local t_corners = table.copy(t.corners)
--don't use t_corners=t.corners otherwise t.corners is altered
--complete the t_corners table if needed
for i=#t_corners+1,4 do
t_corners[i]=t_corners[#t_corners]
local flag=false
for j,v in pairs(table_corners) do flag=flag or (t_corners[i][1]==v) end
if not flag then print ("error in corners table :",t_corners[i][1]);t_corners[i][1]="curve" end
end
--this way :
-- t_corners[1][4]=x
-- t_corners[2][3]=y
--doesn't work
t_corners[1]={t_corners[1][1],t_corners[1][2],0,0}
t_corners[2]={t_corners[2][1],t_corners[2][2],t.w,0}
t_corners[3]={t_corners[3][1],t_corners[3][2],t.w,t.h}
t_corners[4]={t_corners[4][1],t_corners[4][2],0,t.h}
t.no_gradient = (t.linear_gradient == nil ) and (t.radial_gradient == nil )
cairo_save(cr)
cairo_translate(cr, t.x, t.y)
if t.rot_x~=0 or t.rot_y~=0 or t.angle~=0 then
cairo_translate(cr,t.rot_x,t.rot_y)
cairo_rotate(cr,t.angle*math.pi/180)
cairo_translate(cr,-t.rot_x,-t.rot_y)
end
if t.scale_x~=1 or t.scale_y~=1 or t.skew_x~=0 or t.skew_y~=0 then
local matrix0 = cairo_matrix_t:create()
tolua.takeownership(matrix0)
cairo_matrix_init (matrix0, t.scale_x,math.pi*t.skew_y/180 , math.pi*t.skew_x/180 ,t.scale_y,0,0)
cairo_transform(cr,matrix0)
end
local tc=t_corners
cairo_move_to(cr,tc[1][2],0)
cairo_line_to(cr,t.w-tc[2][2],0)
draw_corner(2,tc[2])
cairo_line_to(cr,t.w,t.h-tc[3][2])
draw_corner(3,tc[3])
cairo_line_to(cr,tc[4][2],t.h)
draw_corner(4,tc[4])
cairo_line_to(cr,0,tc[1][2])
draw_corner(1,tc[1])
if t.no_gradient then
cairo_set_source_rgba(cr,rgba_to_r_g_b_a(t.colour[1]))
else
if t.linear_gradient ~= nil then
pat = cairo_pattern_create_linear (t.linear_gradient[1],t.linear_gradient[2],t.linear_gradient[3],t.linear_gradient[4])
elseif t.radial_gradient ~= nil then
pat = cairo_pattern_create_radial (t.radial_gradient[1],t.radial_gradient[2],t.radial_gradient[3],
t.radial_gradient[4],t.radial_gradient[5],t.radial_gradient[6])
end
for i=1, #t.colour do
cairo_pattern_add_color_stop_rgba (pat, t.colour[i][1], rgba_to_r_g_b_a(t.colour[i]))
end
cairo_set_source (cr, pat)
cairo_pattern_destroy(pat)
end
cairo_set_operator(cr,t_operators[t.operator])
if t.border>0 then
cairo_close_path(cr)
if t.dash ~= nil then cairo_set_dash(cr, t.dash, 1, 0.0) end
cairo_set_line_width(cr,t.border)
cairo_stroke(cr)
else
cairo_fill(cr)
end
cairo_restore(cr)
end
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