event.lua

   1 #!/usr/bin/lua
   2
   3 MyWidget = {
   4         event = function (b,e,...)
   5                 local mt, env = getmetatable(e), debug.getfenv(e)
   6                 print(mt, env)
   7                 table.foreach(env, print)
   8                 print(b.__qtype,e.__qtype,e:type(),...)
   9         end,
  10         __base = { QPushButton=QPushButton },
  11         __index = function(t, k) return QPushButton.__index(t, k) end,
  12         __newindex = QPushButton.__newindex,
  13 }
  14
  15 MyWidget.new = function(...)
  16         local ret = QPushButton.new(...)
  17         debug.setmetatable(ret, MyWidget)
  18         print(ret, getmetatable(ret), MyWidget )
  19         return ret
  20 end
  21
  22 b = MyWidget.new()
  23
  24 print(b, b.__index, '->', type(b.__index(b, "show")))
  25 b:show()
  26
  27 return true, tostring(getmetatable(b)), tostring(MyWidget)
  28
  29