lib/wibox/widget/systray.lua.in

   1 ---------------------------------------------------------------------------
   2 -- @author Uli Schlachter
   3 -- @copyright 2010 Uli Schlachter
   4 -- @release @AWESOME_VERSION@
   5 ---------------------------------------------------------------------------
   6
   7 local wbase = require("wibox.widget.base")
   8 local lbase = require("wibox.layout.base")
   9 local beautiful = require("beautiful")
  10 local capi = { awesome = awesome }
  11 local setmetatable = setmetatable
  12 local error = error
  13
  14 -- wibox.widget.systray
  15 local systray = { mt = {} }
  16
  17 local created_systray = false
  18 local horizontal = true
  19 local base_size = nil
  20
  21 function systray.draw(box, wibox, cr, width, height)
  22     local x, y, width, height = lbase.rect_to_device_geometry(cr, 0, 0, width, height)
  23     local num_entries = capi.awesome.systray()
  24     local bg = beautiful.bg_systray or beautiful.bg_normal
  25
  26     local in_dir, ortho, base
  27     if horizontal then
  28         in_dir, ortho = width, height
  29     else
  30         ortho, in_dir = width, height
  31     end
  32     if ortho * num_entries <= in_dir then
  33         base = ortho
  34     else
  35         base = in_dir / num_entries
  36     end
  37     capi.awesome.systray(wibox.drawin, x, y, base, horizontal, bg)
  38 end
  39
  40 function systray.fit(box, width, height)
  41     local num_entries = capi.awesome.systray()
  42     local base = base_size
  43     if base == nil then
  44         if width < height then
  45             base = width
  46         else
  47             base = height
  48         end
  49     end
  50     if horizontal then
  51         return base * num_entries, base
  52     end
  53     return base, base * num_entries
  54 end
  55
  56 local function new()
  57     local ret = wbase.make_widget()
  58
  59     if created_systray then
  60         error("More than one systray created!")
  61     end
  62     created_systray = true
  63
  64     ret.fit = systray.fit
  65     ret.draw = systray.draw
  66     ret.set_base_size = function(_, size) base_size = size end
  67     ret.set_horizontal = function(_, horiz) horizontal = horiz end
  68
  69     capi.awesome.connect_signal("systray::update", function()
  70         ret:emit_signal("widget::updated")
  71     end)
  72
  73     return ret
  74 end
  75
  76 function systray.mt:__call(...)
  77     return new(...)
  78 end
  79
  80 return setmetatable(systray, systray.mt)
  81
  82 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80