builtin/fstk/dialog.lua

   1 --Minetest
   2 --Copyright (C) 2014 sapier
   3 --
   4 --This program is free software; you can redistribute it and/or modify
   5 --it under the terms of the GNU Lesser General Public License as published by
   6 --the Free Software Foundation; either version 2.1 of the License, or
   7 --(at your option) any later version.
   8 --
   9 --this program is distributed in the hope that it will be useful,
  10 --but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 --MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 --GNU Lesser General Public License for more details.
  13 --
  14 --You should have received a copy of the GNU Lesser General Public License along
  15 --with this program; if not, write to the Free Software Foundation, Inc.,
  16 --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18 local function dialog_event_handler(self,event)
  19         if self.user_eventhandler == nil or
  20                 self.user_eventhandler(event) == false then
  21
  22                 --close dialog on esc
  23                 if event == "MenuQuit" then
  24                         self:delete()
  25                         return true
  26                 end
  27         end
  28 end
  29
  30 local dialog_metatable = {
  31         eventhandler = dialog_event_handler,
  32         get_formspec = function(self)
  33                                 if not self.hidden then return self.formspec(self.data) end
  34                         end,
  35         handle_buttons = function(self,fields)
  36                                 if not self.hidden then return self.buttonhandler(self,fields) end
  37                         end,
  38         handle_events  = function(self,event)
  39                                 if not self.hidden then return self.eventhandler(self,event) end
  40                         end,
  41         hide = function(self) self.hidden = true end,
  42         show = function(self) self.hidden = false end,
  43         delete = function(self)
  44                         if self.parent ~= nil then
  45                                 self.parent:show()
  46                         end
  47                         ui.delete(self)
  48                 end,
  49         set_parent = function(self,parent) self.parent = parent end
  50 }
  51 dialog_metatable.__index = dialog_metatable
  52
  53 function dialog_create(name,get_formspec,buttonhandler,eventhandler)
  54         local self = {}
  55
  56         self.name = name
  57         self.type = "toplevel"
  58         self.hidden = true
  59         self.data = {}
  60
  61         self.formspec      = get_formspec
  62         self.buttonhandler = buttonhandler
  63         self.user_eventhandler  = eventhandler
  64
  65         setmetatable(self,dialog_metatable)
  66
  67         ui.add(self)
  68         return self
  69 end