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- --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
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- local function wordwrap_quickhack(str)
- local res = ""
- local ar = str:split("\n")
- for i = 1, #ar do
- local text = ar[i]
- -- Hack to add word wrapping.
- -- TODO: Add engine support for wrapping in formspecs
- while #text > 80 do
- if res ~= "" then
- res = res .. ","
- end
- res = res .. core.formspec_escape(string.sub(text, 1, 79))
- text = string.sub(text, 80, #text)
- end
- if res ~= "" then
- res = res .. ","
- end
- res = res .. core.formspec_escape(text)
- end
- return res
- end
- --------------------------------------------------------------------------------
- function ui.update()
- local formspec = ""
- -- handle errors
- if gamedata ~= nil and gamedata.reconnect_requested then
- formspec = wordwrap_quickhack(gamedata.errormessage or "")
- formspec = "size[12,5]" ..
- "label[0.5,0;" .. fgettext("The server has requested a reconnect:") ..
- "]textlist[0.2,0.8;11.5,3.5;;" .. formspec ..
- "]button[6,4.6;3,0.5;btn_reconnect_no;" .. fgettext("Main menu") .. "]" ..
- "button[3,4.6;3,0.5;btn_reconnect_yes;" .. fgettext("Reconnect") .. "]"
- elseif gamedata ~= nil and gamedata.errormessage ~= nil then
- formspec = wordwrap_quickhack(gamedata.errormessage)
- local error_title
- if string.find(gamedata.errormessage, "ModError") then
- error_title = fgettext("An error occured in a Lua script, such as a mod:")
- else
- error_title = fgettext("An error occured:")
- end
- formspec = "size[12,5]" ..
- "label[0.5,0;" .. error_title ..
- "]textlist[0.2,0.8;11.5,3.5;;" .. formspec ..
- "]button[4.5,4.6;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
- 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(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
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