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--Minetest
--Copyright (C) 2014 sapier
--
--self program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--self 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 Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with self program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
ui = {}
ui.childlist = {}
ui.default = nil
--------------------------------------------------------------------------------
function ui.add(child)
--TODO check child
ui.childlist[child.name] = child
return child.name
end
--------------------------------------------------------------------------------
function ui.delete(child)
if ui.childlist[child.name] == nil then
return false
end
ui.childlist[child.name] = nil
return true
end
--------------------------------------------------------------------------------
function ui.set_default(name)
ui.default = name
end
--------------------------------------------------------------------------------
function ui.find_by_name(name)
return ui.childlist[name]
end
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Internal functions not to be called from user
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
function ui.update()
local formspec = ""
-- handle errors
if gamedata ~= nil and gamedata.errormessage ~= nil then
formspec = "size[12,3.2]" ..
"textarea[1,1;10,2;;ERROR: " ..
core.formspec_escape(gamedata.errormessage) ..
";]"..
"button[4.5,2.5;3,0.5;btn_error_confirm;" .. fgettext("Ok") .. "]"
else
local active_toplevel_ui_elements = 0
for key,value in pairs(ui.childlist) do
if (value.type == "toplevel") then
local retval = value:get_formspec()
if retval ~= nil and retval ~= "" then
active_toplevel_ui_elements = active_toplevel_ui_elements +1
formspec = formspec .. retval
end
end
end
-- no need to show addons if there ain't a toplevel element
if (active_toplevel_ui_elements > 0) then
for key,value in pairs(ui.childlist) do
if (value.type == "addon") then
local retval = value:get_formspec()
if retval ~= nil and retval ~= "" then
formspec = formspec .. retval
end
end
end
end
if (active_toplevel_ui_elements > 1) then
print("WARNING: ui manager detected more then one active ui element, self most likely isn't intended")
end
if (active_toplevel_ui_elements == 0) then
print("WARNING: not a single toplevel ui element active switching to default")
ui.childlist[ui.default]:show()
formspec = ui.childlist[ui.default]:get_formspec()
end
end
core.update_formspec(formspec)
end
--------------------------------------------------------------------------------
function ui.handle_buttons(fields)
if fields["btn_error_confirm"] then
gamedata.errormessage = nil
update_menu()
return
end
for key,value in pairs(ui.childlist) do
local retval = value:handle_buttons(fields)
if retval then
ui.update()
return
end
end
end
--------------------------------------------------------------------------------
function ui.handle_events(event)
for key,value in pairs(ui.childlist) do
if value.handle_events ~= nil then
local retval = value:handle_events(event)
if retval then
print("event handled by: " .. key)
return retval
end
end
end
end
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- initialize callbacks
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
core.button_handler = function(fields)
if fields["btn_error_confirm"] then
gamedata.errormessage = nil
ui.update()
return
end
if ui.handle_buttons(fields) then
ui.update()
end
end
--------------------------------------------------------------------------------
core.event_handler = function(event)
if ui.handle_events(event) then
ui.update()
return
end
if event == "Refresh" then
ui.update()
return
end
end
|
