--Minetest --Copyright (C) 2014 sapier -- --This 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. -- --This 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 this 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.reconnect_requested then local error_message = core.formspec_escape( gamedata.errormessage or "<none available>") formspec = { "size[14,8]", "real_coordinates[true]", "box[0.5,1.2;13,5;#000]", ("textarea[0.5,1.2;13,5;;%s;%s]"):format( fgettext("The server has requested a reconnect:"), error_message), "button[2,6.6;4,1;btn_reconnect_yes;" .. fgettext("Reconnect") .. "]", "button[8,6.6;4,1;btn_reconnect_no;" .. fgettext("Main menu") .. "]" } elseif gamedata ~= nil and gamedata.errormessage ~= nil then local error_message = core.formspec_escape(gamedata.errormessage) local error_title if string.find(gamedata.errormessage, "ModError") then error_title = fgettext("An error occurred in a Lua script:") else error_title = fgettext("An error occurred:") end formspec = { "size[14,8]", "real_coordinates[true]", "box[0.5,1.2;13,5;#000]", ("textarea[0.5,1.2;13,5;;%s;%s]"):format( error_title, error_message), "button[5,6.6;4,1;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 table.insert(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 table.insert(formspec, retval) end end end end if (active_toplevel_ui_elements > 1) then core.log("warning", "more than one active ui ".. "element, self most likely isn't intended") end if (active_toplevel_ui_elements == 0) then core.log("warning", "no toplevel ui element ".. "active; switching to default") ui.childlist[ui.default]:show() formspec = {ui.childlist[ui.default]:get_formspec()} end end core.update_formspec(table.concat(formspec)) end -------------------------------------------------------------------------------- function ui.handle_buttons(fields) 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 return retval end end end end -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- -- initialize callbacks -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- core.button_handler = function(fields) if fields["btn_reconnect_yes"] then gamedata.reconnect_requested = false gamedata.errormessage = nil gamedata.do_reconnect = true core.start() return elseif fields["btn_reconnect_no"] or fields["btn_error_confirm"] then gamedata.errormessage = nil gamedata.reconnect_requested = false 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