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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.
--------------------------------------------------------------------------------
-- A tabview implementation --
-- Usage: --
-- tabview.create: returns initialized tabview raw element --
-- element.add(tab): add a tab declaration --
-- element.handle_buttons() --
-- element.handle_events() --
-- element.getFormspec() returns formspec of tabview --
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
local function add_tab(self,tab)
assert(tab.size == nil or (type(tab.size) == table and
tab.size.x ~= nil and tab.size.y ~= nil))
assert(tab.cbf_formspec ~= nil and type(tab.cbf_formspec) == "function")
assert(tab.cbf_button_handler == nil or
type(tab.cbf_button_handler) == "function")
assert(tab.cbf_events == nil or type(tab.cbf_events) == "function")
local newtab = {
name = tab.name,
caption = tab.caption,
button_handler = tab.cbf_button_handler,
event_handler = tab.cbf_events,
get_formspec = tab.cbf_formspec,
tabsize = tab.tabsize,
on_change = tab.on_change,
tabdata = {},
}
self.tablist[#self.tablist + 1] = newtab
if self.last_tab_index == #self.tablist then
self.current_tab = tab.name
if tab.on_activate ~= nil then
tab.on_activate(nil,tab.name)
end
end
end
--------------------------------------------------------------------------------
local function get_formspec(self)
if self.hidden or (self.parent ~= nil and self.parent.hidden) then
return ""
end
local tab = self.tablist[self.last_tab_index]
local content, prepend = tab.get_formspec(self, tab.name, tab.tabdata, tab.tabsize)
if self.parent == nil and not prepend then
local tsize = tab.tabsize or {width=self.width, height=self.height}
prepend = string.format("size[%f,%f,%s]", tsize.width, tsize.height,
dump(self.fixed_size))
end
local formspec = (prepend or "") .. self:tab_header() .. content
return formspec
end
--------------------------------------------------------------------------------
local function handle_buttons(self,fields)
if self.hidden then
return false
end
if self:handle_tab_buttons(fields) then
return true
end
if self.glb_btn_handler ~= nil and
self.glb_btn_handler(self,fields) then
return true
end
local tab = self.tablist[self.last_tab_index]
if tab.button_handler ~= nil then
return tab.button_handler(self, fields, tab.name, tab.tabdata)
end
return false
end
--------------------------------------------------------------------------------
local function handle_events(self,event)
if self.hidden then
return false
end
if self.glb_evt_handler ~= nil and
self.glb_evt_handler(self,event) then
return true
end
local tab = self.tablist[self.last_tab_index]
if tab.evt_handler ~= nil then
return tab.evt_handler(self, event, tab.name, tab.tabdata)
end
return false
end
--------------------------------------------------------------------------------
local function tab_header(self)
local toadd = ""
for i=1,#self.tablist,1 do
if toadd ~= "" then
toadd = toadd .. ","
end
toadd = toadd .. self.tablist[i].caption
end
return string.format("tabheader[%f,%f;%s;%s;%i;true;false]",
self.header_x, self.header_y, self.name, toadd, self.last_tab_index);
end
--------------------------------------------------------------------------------
local function switch_to_tab(self, index)
--first call on_change for tab to leave
if self.tablist[self.last_tab_index].on_change ~= nil then
self.tablist[self.last_tab_index].on_change("LEAVE",
self.current_tab, self.tablist[index].name)
end
--update tabview data
self.last_tab_index = index
local old_tab = self.current_tab
self.current_tab = self.tablist[index].name
if (self.autosave_tab) then
core.settings:set(self.name .. "_LAST",self.current_tab)
end
-- call for tab to enter
if self.tablist[index].on_change ~= nil then
self.tablist[index].on_change("ENTER",
old_tab,self.current_tab)
end
end
--------------------------------------------------------------------------------
local function handle_tab_buttons(self,fields)
--save tab selection to config file
if fields[self.name] then
local index = tonumber(fields[self.name])
switch_to_tab(self, index)
return true
end
return false
end
--------------------------------------------------------------------------------
local function set_tab_by_name(self, name)
for i=1,#self.tablist,1 do
if self.tablist[i].name == name then
switch_to_tab(self, i)
return true
end
end
return false
end
--------------------------------------------------------------------------------
local function hide_tabview(self)
self.hidden=true
--call on_change as we're not gonna show self tab any longer
if self.tablist[self.last_tab_index].on_change ~= nil then
self.tablist[self.last_tab_index].on_change("LEAVE",
self.current_tab, nil)
end
end
--------------------------------------------------------------------------------
local function show_tabview(self)
self.hidden=false
-- call for tab to enter
if self.tablist[self.last_tab_index].on_change ~= nil then
self.tablist[self.last_tab_index].on_change("ENTER",
nil,self.current_tab)
end
end
local tabview_metatable = {
add = add_tab,
handle_buttons = handle_buttons,
handle_events = handle_events,
get_formspec = get_formspec,
show = show_tabview,
hide = hide_tabview,
delete = function(self) ui.delete(self) end,
set_parent = function(self,parent) self.parent = parent end,
set_autosave_tab =
function(self,value) self.autosave_tab = value end,
set_tab = set_tab_by_name,
set_global_button_handler =
function(self,handler) self.glb_btn_handler = handler end,
set_global_event_handler =
function(self,handler) self.glb_evt_handler = handler end,
set_fixed_size =
function(self,state) self.fixed_size = state end,
tab_header = tab_header,
handle_tab_buttons = handle_tab_buttons
}
tabview_metatable.__index = tabview_metatable
--------------------------------------------------------------------------------
function tabview_create(name, size, tabheaderpos)
local self = {}
self.name = name
self.type = "toplevel"
self.width = size.x
self.height = size.y
self.header_x = tabheaderpos.x
self.header_y = tabheaderpos.y
setmetatable(self, tabview_metatable)
self.fixed_size = true
self.hidden = true
self.current_tab = nil
self.last_tab_index = 1
self.tablist = {}
self.autosave_tab = false
ui.add(self)
return self
end
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