vcs.maemo.org Git - monky/blob - lua_scripts/text.lua

   1 --[[TEXT WIDGET v1.. by Wlourf 25/06/2010
   2 This widget can drawn texts set in the "text_settings" table with some parameters
   3 http://u-scripts.blogspot.com/2010/06/text-widget.html
   4
   5 The parameters (all optionals) are :
   6 text        - text to display, default = "Conky is good for you"
   7                           use conky_parse to display conky value ie text=conly_parse("${cpu cpu1}")
   8             - coordinates below are relative to top left corner of the conky window
   9 x           - x coordinate of first letter (bottom-left), default = center of conky window
  10 y           - y coordinate of first letter (bottom-left), default = center of conky window
  11 h_align         - horizontal alignement of text relative to point (x,y), default="l"
  12                           available values are "l": left, "c" : center, "r" : right
  13 v_align         - vertical alignment of text relative to point (x,y), default="b"
  14                           available values "t" : top, "m" : middle, "b" : bottom
  15 font_name   - name of font to use, default = Free Sans
  16 font_size   - size of font to use, default = 14
  17 italic      - display text in italic (true/false), default=false
  18 oblique     - display text in oblique (true/false), default=false (I don' see the difference with italic!)
  19 bold        - display text in bold (true/false), default=false
  20 angle       - rotation of text in degrees, default = 0 (horizontal)
  21 colour      - table of colours for text, default = plain white {{1,0xFFFFFF,1}}
  22                           this table contains one or more tables with format {P,C,A}
  23               P=position of gradient (0 = beginning of text, 1= end of text)
  24               C=hexadecimal colour
  25               A=alpha (opacity) of color (0=invisible,1=opacity 100%)
  26               Examples :
  27               for a plain color {{1,0x00FF00,0.5}}
  28               for a gradient with two colours {{0,0x00FF00,0.5},{1,0x000033,1}}
  29               or {{0.5,0x00FF00,1},{1,0x000033,1}} -with this one, gradient will start in the middle of the text
  30               for a gradient with three colours {{0,0x00FF00,0.5},{0.5,0x000033,1},{1,0x440033,1}}
  31                           and so on ...
  32 orientation     - in case of gradient, "orientation" defines the starting point of the gradient, default="ww"
  33                           there are 8 available starting points : "nw","nn","ne","ee","se","ss","sw","ww"
  34                           (n for north, w for west ...)
  35                           theses 8 points are the 4 corners + the 4 middles of text's outline
  36                           so a gradient "nn" will go from "nn" to "ss" (top to bottom, parallele to text)
  37                           a gradient "nw" will go from "nw" to "se" (left-top corner to right-bottom corner)
  38 radial          - define a radial gradient (if present at the same time as "orientation", "orientation" will have no effect)
  39                           this parameter is a table with 6 numbers : {xa,ya,ra,xb,yb,rb}
  40                           they define two circle for the gradient :
  41                           xa, ya, xb and yb are relative to x and y values above
  42 reflection_alpha    - add a reflection effect (values from 0 to 1) default = 0 = no reflection
  43                       other values = starting opacity
  44 reflection_scale    - scale of the reflection (default = 1 = height of text)
  45 reflection_length   - length of reflection, define where the opacity will be set to zero
  46                                           calues from 0 to 1, default =1
  47 skew_x,skew_y    - skew text around x or y axis
  48
  49
  50 Needs conky 1.8.0
  51
  52 To call this script in the conkyrc, in before-TEXT section:
  53     lua_load /path/to/the/lua/script/text.lua
  54     lua_draw_hook_pre draw_text
  55
  56 v1.0    07/06/2010, Original release
  57 v1.1    10/06/2010      Add "orientation" parameter
  58 v1.2    15/06/2010  Add "h_align", "v_align" and "radial" parameters
  59 v1.3    25/06/2010  Add "reflection_alpha", "reflection_length", "reflection_scale",
  60                     "skew_x" et "skew_y"
  61
  62
  63 ]]
  64
  65 require 'cairo'
  66
  67 function conky_draw_text()
  68         local col0,col1,col2=0xFFFFCC,0xCCFF99,0x99FF00
  69         local colbg=0x99CCFF
  70     local text_settings={
  71                 {
  72                                 text=conky_parse("${time %I:%M%p %D}"),
  73                                 font_size=24,
  74                                 bold=true,
  75                                 font_name="Droid Sans Mono",
  76                                 h_align="l",
  77                                 v_align="t",
  78                                 x=5,
  79                                 y=5,
  80                                 reflection_alpha=0,
  81                                 reflection_length=0,
  82  colour={
  83          {0.98,    0xFF0000,1},
  84          {0.99,    0xFFCC00,1},
  85          {1.00,    0xFF0000,1},
  86          },
  87  radial={400,-700,0,100,-1000,1024}
  88                 },
  89                 {
  90                                 text=conky_parse("$sysname $kernel on $machine - $uptime"),
  91                                 font_size=16,
  92                                 bold=true,
  93                                 font_name="Droid Sans Mono",
  94                                 h_align="r",
  95                                 x=800,
  96                                 y=15,
  97                                 reflection_alpha=0,
  98                                 reflection_length=0,
  99                                 colour={{0,col0,0.75},{1,colbg,0.75}},
 100
 101                 },
 102                 {
 103                                 text=conky_parse("$freq MHz"),
 104                                 font_name="Droid Sans Mono",
 105                                 font_size=16,
 106                                 h_align="l",
 107                                 v_align="t",
 108                                 bold=true,
 109                                 x=20,
 110                                 y=60,
 111                                 reflection_alpha=0,
 112                                 reflection_length=0,
 113                                 colour={{0,col0,1},{0.5,colbg,1}},
 114                                 orientation="nn",
 115                 },
 116                 {
 117                     text=conky_parse("${battery_temp}").."\194\176",--yes i had to do the degree symbol like that...
 118                         x=794,
 119                     y=69,
 120                     v_align="m",
 121                     h_align="r",
 122                     font_name="Droid Sans Mono",
 123                     font_size=14,
 124                         colour={{0,col0,1},{0.5,colbg,1}},
 125                                 orientation="nn",
 126                 reflection_alpha=0,
 127                 reflection_length=0,
 128         },
 129         {
 130                     text=conky_parse("${battery_short} ${battery_volts}mV"),
 131                         x=794,
 132                     y=45,
 133                     v_align="m",
 134                     h_align="r",
 135                     font_name="Droid Sans Mono",
 136                     font_size=14,
 137                         colour={{0,col0,1},{0.5,colbg,1}},
 138                                 orientation="nn",
 139                 reflection_alpha=0,
 140                 reflection_length=0,
 141         },
 142         {
 143                     text=conky_parse("${cell_radio_dbm}".."dBm"),
 144                         x=510,
 145                     y=50,
 146                     font_name="Droid Sans Mono",
 147                     font_size=14,
 148                         colour={{0,col0,1},{0.5,colbg,1}},
 149                                 orientation="nn",
 150                 reflection_alpha=0.0,
 151                 reflection_length=0.0,
 152         },
 153         {
 154                     text=conky_parse('${cpu}').."%",
 155                         x=223,
 156                     y=65,
 157                     v_align="t",
 158                     h_align="l",
 159                     font_name="Droid Sans Mono",
 160                     font_size=18,
 161                         colour={{0,col0,1},{0.5,colbg,1}},
 162                                 orientation="ww",
 163                 reflection_alpha=0,
 164                 reflection_length=0,
 165         },
 166         {
 167                     text=conky_parse('${memperc}').."%",
 168                     x=223,
 169                     y=91,
 170                     v_align="t",
 171                     font_name="Droid Sans Mono",
 172                     font_size=18,
 173                         colour={{0,col0,1},{0.5,colbg,1}},
 174                                 orientation="nn",
 175                                 reflection_alpha=0,
 176                                 reflection_length=0,
 177         },
 178         {
 179                     text=conky_parse('${fs_used /} / ${fs_size /} (${fs_free /})'),
 180                     x=5,
 181                     y=115,
 182                     v_align="t",
 183                     font_name="Droid Sans Mono",
 184                     font_size=16,
 185                         colour={{conky_parse('${fs_used_perc /}')/100,0x000000,1},{1,0xFFFFFF,1}},
 186                                 orientation="ww",
 187                                 reflection_alpha=0,
 188                                 reflection_length=0,
 189         },
 190         {
 191                     text="/",
 192                     x=220,
 193                     y=114,
 194                     v_align="t",
 195                     font_name="Droid Sans Mono",
 196                     font_size=18,
 197                         colour={{0,0x336633,1},{1,col0,1}},
 198                         bold=true,
 199                                 orientation="ww",
 200                                 reflection_alpha=0,
 201                                 reflection_length=0,
 202         },
 203         {
 204                     text=conky_parse('${fs_used /home} / ${fs_size /home} (${fs_free /home})'),
 205                     x=5,
 206                     y=135,
 207                     v_align="t",
 208                     font_name="Droid Sans Mono",
 209                     font_size=16,
 210                         colour={{conky_parse('${fs_used_perc /home}')/100,0x000000,1},{1,0xFFFFFF,1}},
 211                                 orientation="ww",
 212                                 reflection_alpha=0,
 213                                 reflection_length=0,
 214         },
 215         {
 216                     text="/home",
 217                     x=220,
 218                     y=134,
 219                     v_align="t",
 220                     font_name="Droid Sans Mono",
 221                     font_size=18,
 222                         colour={{0,0x336633,1},{1,col0,1}},
 223                         bold=true,
 224                                 orientation="ww",
 225                                 reflection_alpha=0,
 226                                 reflection_length=0,
 227         },
 228         {
 229                     text=conky_parse('${fs_used /home/user/MyDocs} / ${fs_size /home/user/MyDocs} (${fs_free /home/user/MyDocs})'),
 230                     x=5,
 231                     y=155,
 232                     v_align="t",
 233                     font_name="Droid Sans Mono",
 234                     font_size=16,
 235                         colour={{conky_parse('${fs_used_perc /home/user/MyDocs}')/100-.1,0x000000,1},{1,0xFFFFFF,1}},
 236                                 orientation="ww",
 237                                 reflection_alpha=0,
 238                                 reflection_length=0,
 239                                 DrawMe=conky_parse("${if_mounted /home/user/MyDocs}1$endif")
 240         },
 241         {
 242                     text="MyDocs",
 243                     x=220,
 244                     y=154,
 245                     v_align="t",
 246                     font_name="Droid Sans Mono",
 247                     font_size=18,
 248                         colour={{0,0x336633,1},{1,col0,1}},
 249                         bold=true,
 250                                 orientation="ww",
 251                                 reflection_alpha=0,
 252                                 reflection_length=0,
 253                                 DrawMe=conky_parse("${if_mounted /home/user/MyDocs}1$endif")
 254         },
 255         {
 256                     text=conky_parse('${fs_used /media/mmc1} / ${fs_size /media/mmc1} (${fs_free /media/mmc1})'),
 257                     x=5,
 258                     y=175,
 259                     v_align="t",
 260                     font_name="Droid Sans Mono",
 261                     font_size=16,
 262                         colour={{conky_parse('${fs_used_perc /media/mmc1}')/100-.1,0x000000,1},{1,0xFFFFFF,1}},
 263                                 orientation="ww",
 264                                 reflection_alpha=0,
 265                                 reflection_length=0,
 266                                 DrawMe=conky_parse("${if_mounted /media/mmc1}1$endif")
 267         },
 268         {
 269                     text="SDCard",
 270                     x=220,
 271                     y=174,
 272                     v_align="t",
 273                     font_name="Droid Sans Mono",
 274                     font_size=18,
 275                         colour={{0,0x336633,1},{1,col0,1}},
 276                         bold=true,
 277                                 orientation="ww",
 278                                 reflection_alpha=0,
 279                                 reflection_length=0,
 280                                 DrawMe=conky_parse("${if_mounted /media/mmc1}1$endif"),
 281         },
 282         {
 283                     text=conky_parse('${wireless_essid wlan0}'),
 284                         x=400,
 285                     y=201,
 286                     h_align="c",
 287                     v_align="m",
 288                     font_name="Droid Sans Mono",
 289                     font_size=18,
 290                         colour={{0,col0,1},{0.5,colbg,1}},
 291                                 orientation="nn",
 292                 reflection_alpha=0,
 293                 reflection_length=0,
 294                 DrawMe=conky_parse("${if_empty ${wireless_essid wlan0}}${else}1$endif"),
 295         },
 296         {
 297                     text="GPRS",
 298                         x=400,
 299                     y=201,
 300                     h_align="c",
 301                     v_align="m",
 302                     font_name="Droid Sans Mono",
 303                     font_size=18,
 304                         colour={{0,col0,1},{0.5,colbg,1}},
 305                                 orientation="nn",
 306                 reflection_alpha=0,
 307                 reflection_length=0,
 308                 DrawMe=conky_parse("${if_up gprs0}1${else}0$endif"),
 309         },
 310         {
 311                     text=conky_parse('${wireless_link_qual_perc wlan0}')..'%',
 312                         x=400,
 313                     y=228,
 314                     h_align="c",
 315                     v_align="l",
 316                     font_name="Droid Sans Mono",
 317                     font_size=14,
 318                         colour={{0,col0,1},{0.5,colbg,1}},
 319                                 orientation="nn",
 320                 reflection_alpha=0,
 321                 reflection_length=0,
 322                 DrawMe=conky_parse("${if_empty ${wireless_essid wlan0}}${else}1$endif"),
 323         },
 324         {
 325                     text='Up '..conky_parse('${upspeed wlan0}'),
 326                         x=225,
 327                     y=223,
 328                     h_align="l",
 329                     v_align="m",
 330                     font_name="LEDFont",
 331                     font_size=22,
 332                     bold=true,
 333                         colour={{0,0xcc0066,1}},
 334                                 orientation="ww",
 335                 reflection_alpha=0,
 336                 reflection_length=0,
 337                 DrawMe=conky_parse("${if_empty ${wireless_essid wlan0}}${else}1$endif"),
 338         },
 339         {
 340                     text=conky_parse('${downspeed wlan0}')..' Down',
 341                         x=650,
 342                     y=223,
 343                     h_align="r",
 344                     v_align="m",
 345                     font_name="LEDFont",
 346                     font_size=22,
 347                     bold=true,
 348                         colour={{0,0xcc0066,1}},
 349                                 orientation="ww",
 350                 reflection_alpha=0,
 351                 reflection_length=0,
 352                 DrawMe=conky_parse("${if_empty ${wireless_essid wlan0}}${else}1$endif"),
 353         },
 354         {
 355                     text='Up '..conky_parse('${upspeed gprs0}'),
 356                         x=225,
 357                     y=223,
 358                     h_align="l",
 359                     v_align="m",
 360                     font_name="LEDFont",
 361                     font_size=22,
 362                     bold=true,
 363                         colour={{0,0xcc0066,1}},
 364                                 orientation="ww",
 365                 reflection_alpha=0,
 366                 reflection_length=0,
 367                 DrawMe=conky_parse("${if_up gprs0}1${else}0$endif"),
 368         },
 369         {
 370                     text=conky_parse('${downspeed gprs0}')..' Down',
 371                         x=650,
 372                     y=223,
 373                     h_align="r",
 374                     v_align="m",
 375                     font_name="LEDFont",
 376                     font_size=22,
 377                     bold=true,
 378                         colour={{0,0xcc0066,1}},
 379                                 orientation="ww",
 380                 reflection_alpha=0,
 381                 reflection_length=0,
 382                 DrawMe=conky_parse("${if_up gprs0}1${else}0$endif"),
 383         },
 384     }
 385     if conky_window == nil then return end
 386     if tonumber(conky_parse("$updates"))<3 then return end
 387         local cs = cairo_xlib_surface_create(conky_window.display, conky_window.drawable, conky_window.visual, conky_window.width, conky_window.height)
 388     for i,v in pairs(text_settings) do
 389         cr = cairo_create (cs)
 390                         display_text(v)
 391             cairo_destroy(cr)
 392             cr = nil
 393     end
 394         cairo_surface_destroy(cs)
 395 end
 396
 397 function rgb_to_r_g_b2(tcolour)
 398     local colour,alpha=tcolour[2],tcolour[3]
 399     return ((colour / 0x10000) % 0x100) / 255., ((colour / 0x100) % 0x100) / 255., (colour % 0x100) / 255., alpha
 400 end
 401
 402 function display_text(t)
 403         if t.DrawMe~=nil and t.DrawMe ~= "1" then return end
 404         local function set_pattern(te)
 405                 --this function set the pattern
 406                 if #t.colour==1 then
 407                     cairo_set_source_rgba(cr,rgb_to_r_g_b2(t.colour[1]))
 408                 else
 409                         local pat
 410                         if t.radial==nil then
 411                                 local pts=linear_orientation(t,te)
 412                                 pat = cairo_pattern_create_linear (pts[1],pts[2],pts[3],pts[4])
 413                         else
 414                                 pat = cairo_pattern_create_radial (t.radial[1],t.radial[2],t.radial[3],t.radial[4],t.radial[5],t.radial[6])
 415                         end
 416                     for i=1, #t.colour do
 417                         cairo_pattern_add_color_stop_rgba (pat, t.colour[i][1], rgb_to_r_g_b2(t.colour[i]))
 418                     end
 419                     cairo_set_source (cr, pat)
 420                         cairo_pattern_destroy(pat)
 421                 end
 422     end
 423
 424     --set default values if needed
 425     if t.text==nil then t.text="Conky is good for you !" end
 426     if t.x==nil then t.x = conky_window.width/2 end
 427     if t.y==nil then t.y = conky_window.height/2 end
 428     if t.colour==nil then t.colour={{1,0xFFFFFF,1}} end
 429     if t.font_name==nil then t.font_name="Free Sans" end
 430     if t.font_size==nil then t.font_size=14 end
 431     if t.angle==nil then t.angle=0 end
 432     if t.italic==nil then t.italic=false end
 433     if t.oblique==nil then t.oblique=false end
 434     if t.bold==nil then t.bold=false end
 435     if t.radial ~= nil then
 436         if #t.radial~=6 then
 437                 print ("error in radial table")
 438                 t.radial=nil
 439         end
 440     end
 441     if t.orientation==nil then t.orientation="ww" end
 442     if t.h_align==nil then t.h_align="l" end
 443     if t.v_align==nil then t.v_align="b" end
 444     if t.reflection_alpha == nil then t.reflection_alpha=0 end
 445     if t.reflection_length == nil then t.reflection_length=1 end
 446     if t.reflection_scale == nil then t.reflection_scale=1 end
 447     if t.rotx==nil then t.rotx=0 end
 448     if t.roty==nil then t.roty=0 end
 449     cairo_translate(cr,t.x,t.y)
 450     cairo_rotate(cr,t.angle*math.pi/180)
 451     cairo_save(cr)
 452     local slant = CAIRO_FONT_SLANT_NORMAL
 453     local weight = CAIRO_FONT_WEIGHT_NORMAL
 454     if t.italic then slant = CAIRO_FONT_SLANT_ITALIC end
 455     if t.oblique then slant = CAIRO_FONT_SLANT_OBLIQUE end
 456     if t.bold then weight = CAIRO_FONT_WEIGHT_BOLD end
 457     cairo_select_font_face(cr, t.font_name, slant,weight)
 458     for i=1, #t.colour do
 459         if #t.colour[i]~=3 then
 460                 print ("error in color table")
 461                 t.colour[i]={1,0xFFFFFF,1}
 462         end
 463     end
 464         local matrix0 = cairo_matrix_t:create()
 465         tolua.takeownership(matrix0)
 466         local rotx,roty=t.rotx/t.font_size,t.roty/t.font_size
 467         cairo_matrix_init (matrix0, 1,roty,rotx,1,0,0)
 468         cairo_transform(cr,matrix0)
 469         cairo_set_font_size(cr,t.font_size)
 470         local te=cairo_text_extents_t:create()
 471         tolua.takeownership(te)
 472     cairo_text_extents (cr,t.text,te)
 473         set_pattern(te)
 474     local mx,my=0,0
 475     if t.h_align=="c" then
 476             mx=-te.width/2
 477     elseif t.h_align=="r" then
 478             mx=-te.width
 479         end
 480     if t.v_align=="m" then
 481             my=-te.height/2-te.y_bearing
 482     elseif t.v_align=="t" then
 483             my=-te.y_bearing
 484         end
 485         cairo_move_to(cr,mx,my)
 486     cairo_show_text(cr,t.text)
 487
 488    if t.reflection_alpha ~= 0 then
 489                 local matrix1 = cairo_matrix_t:create()
 490                 tolua.takeownership(matrix1)
 491                 cairo_set_font_size(cr,t.font_size)
 492                 cairo_matrix_init (matrix1,1,0,0,-1*t.reflection_scale,0,(te.height+te.y_bearing+my)*(1+t.reflection_scale))
 493                 cairo_set_font_size(cr,t.font_size)
 494                 te=nil
 495                 local te=cairo_text_extents_t:create()
 496                 tolua.takeownership(te)
 497                 cairo_text_extents (cr,t.text,te)
 498                 cairo_transform(cr,matrix1)
 499                 set_pattern(te)
 500                 cairo_move_to(cr,mx,my)
 501                 cairo_show_text(cr,t.text)
 502                 local pat2 = cairo_pattern_create_linear (0,
 503                                                                                 (te.y_bearing+te.height+my),
 504                                                                                 0,
 505                                                                                 te.y_bearing+my)
 506                 cairo_pattern_add_color_stop_rgba (pat2, 0,1,0,0,1-t.reflection_alpha)
 507                 cairo_pattern_add_color_stop_rgba (pat2, t.reflection_length,0,0,0,1)
 508                 cairo_set_line_width(cr,0)
 509                 local dy=te.x_bearing
 510                 if dy<0 then dy=dy*(-1) end
 511                 cairo_rectangle(cr,mx+te.x_bearing,te.y_bearing+te.height+my,te.width+dy,-te.height*1.05)
 512                 cairo_clip_preserve(cr)
 513                 cairo_set_operator(cr,CAIRO_OPERATOR_CLEAR)
 514                 --cairo_stroke(cr)
 515                 cairo_mask(cr,pat2)
 516                 cairo_pattern_destroy(pat2)
 517                 cairo_set_operator(cr,CAIRO_OPERATOR_OVER)
 518                 te=nil
 519     end
 520 end
 521
 522
 523  function linear_orientation(t,te)
 524         local w,h=te.width,te.height
 525         local xb,yb=te.x_bearing,te.y_bearing
 526
 527     if t.h_align=="c" then
 528             xb=xb-w/2
 529     elseif t.h_align=="r" then
 530             xb=xb-w
 531         end
 532     if t.v_align=="m" then
 533             yb=-h/2
 534     elseif t.v_align=="t" then
 535             yb=0
 536         end
 537         local p=0
 538         if t.orientation=="nn" then
 539                 p={xb+w/2,yb,xb+w/2,yb+h}
 540         elseif t.orientation=="ne" then
 541                 p={xb+w,yb,xb,yb+h}
 542         elseif t.orientation=="ww" then
 543                 p={xb,h/2,xb+w,h/2}
 544         elseif vorientation=="se" then
 545                 p={xb+w,yb+h,xb,yb}
 546         elseif t.orientation=="ss" then
 547                 p={xb+w/2,yb+h,xb+w/2,yb}
 548         elseif vorientation=="ee" then
 549                 p={xb+w,h/2,xb,h/2}
 550         elseif t.orientation=="sw" then
 551                 p={xb,yb+h,xb+w,yb}
 552         elseif t.orientation=="nw" then
 553                 p={xb,yb,xb+w,yb+h}
 554         end
 555         return p
 556 end
 557