258 lines
7.6 KiB
Lua
258 lines
7.6 KiB
Lua
--Minetest
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--Copyright (C) 2014 sapier
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--
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--This program is free software; you can redistribute it and/or modify
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--it under the terms of the GNU Lesser General Public License as published by
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--the Free Software Foundation; either version 2.1 of the License, or
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--(at your option) any later version.
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--
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--This program is distributed in the hope that it will be useful,
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--but WITHOUT ANY WARRANTY; without even the implied warranty of
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--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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--GNU Lesser General Public License for more details.
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--
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--You should have received a copy of the GNU Lesser General Public License along
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--with this program; if not, write to the Free Software Foundation, Inc.,
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--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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--------------------------------------------------------------------------------
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-- A tabview implementation --
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-- Usage: --
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-- tabview.create: returns initialized tabview raw element --
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-- element.add(tab): add a tab declaration --
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-- element.handle_buttons() --
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-- element.handle_events() --
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-- element.getFormspec() returns formspec of tabview --
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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local function add_tab(self,tab)
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assert(tab.size == nil or (type(tab.size) == table and
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tab.size.x ~= nil and tab.size.y ~= nil))
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assert(tab.cbf_formspec ~= nil and type(tab.cbf_formspec) == "function")
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assert(tab.cbf_button_handler == nil or
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type(tab.cbf_button_handler) == "function")
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assert(tab.cbf_events == nil or type(tab.cbf_events) == "function")
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local newtab = {
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name = tab.name,
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caption = tab.caption,
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button_handler = tab.cbf_button_handler,
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event_handler = tab.cbf_events,
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get_formspec = tab.cbf_formspec,
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tabsize = tab.tabsize,
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on_change = tab.on_change,
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tabdata = {},
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}
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self.tablist[#self.tablist + 1] = newtab
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if self.last_tab_index == #self.tablist then
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self.current_tab = tab.name
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if tab.on_activate ~= nil then
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tab.on_activate(nil,tab.name)
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end
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end
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end
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--------------------------------------------------------------------------------
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local function get_formspec(self)
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if self.hidden or (self.parent ~= nil and self.parent.hidden) then
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return ""
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end
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local tab = self.tablist[self.last_tab_index]
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local content, prepend = tab.get_formspec(self, tab.name, tab.tabdata, tab.tabsize)
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if self.parent == nil and not prepend then
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local tsize = tab.tabsize or {width=self.width, height=self.height}
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prepend = string.format("size[%f,%f,%s]", tsize.width, tsize.height,
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dump(self.fixed_size))
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end
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local formspec = (prepend or "") .. self:tab_header() .. content
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return formspec
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end
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--------------------------------------------------------------------------------
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local function handle_buttons(self,fields)
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if self.hidden then
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return false
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end
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if self:handle_tab_buttons(fields) then
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return true
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end
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if self.glb_btn_handler ~= nil and
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self.glb_btn_handler(self,fields) then
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return true
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end
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local tab = self.tablist[self.last_tab_index]
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if tab.button_handler ~= nil then
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return tab.button_handler(self, fields, tab.name, tab.tabdata)
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end
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return false
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end
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--------------------------------------------------------------------------------
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local function handle_events(self,event)
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if self.hidden then
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return false
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end
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if self.glb_evt_handler ~= nil and
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self.glb_evt_handler(self,event) then
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return true
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end
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local tab = self.tablist[self.last_tab_index]
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if tab.evt_handler ~= nil then
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return tab.evt_handler(self, event, tab.name, tab.tabdata)
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end
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return false
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end
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--------------------------------------------------------------------------------
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local function tab_header(self)
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local toadd = ""
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for i=1,#self.tablist,1 do
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if toadd ~= "" then
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toadd = toadd .. ","
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end
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toadd = toadd .. self.tablist[i].caption
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end
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return string.format("tabheader[%f,%f;%s;%s;%i;true;false]",
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self.header_x, self.header_y, self.name, toadd, self.last_tab_index);
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end
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--------------------------------------------------------------------------------
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local function switch_to_tab(self, index)
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--first call on_change for tab to leave
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if self.tablist[self.last_tab_index].on_change ~= nil then
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self.tablist[self.last_tab_index].on_change("LEAVE",
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self.current_tab, self.tablist[index].name)
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end
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--update tabview data
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self.last_tab_index = index
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local old_tab = self.current_tab
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self.current_tab = self.tablist[index].name
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if (self.autosave_tab) then
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core.settings:set(self.name .. "_LAST",self.current_tab)
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end
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-- call for tab to enter
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if self.tablist[index].on_change ~= nil then
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self.tablist[index].on_change("ENTER",
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old_tab,self.current_tab)
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end
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end
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--------------------------------------------------------------------------------
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local function handle_tab_buttons(self,fields)
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--save tab selection to config file
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if fields[self.name] then
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local index = tonumber(fields[self.name])
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switch_to_tab(self, index)
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return true
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end
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return false
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end
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--------------------------------------------------------------------------------
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local function set_tab_by_name(self, name)
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for i=1,#self.tablist,1 do
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if self.tablist[i].name == name then
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switch_to_tab(self, i)
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return true
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end
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end
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return false
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end
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--------------------------------------------------------------------------------
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local function hide_tabview(self)
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self.hidden=true
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--call on_change as we're not gonna show self tab any longer
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if self.tablist[self.last_tab_index].on_change ~= nil then
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self.tablist[self.last_tab_index].on_change("LEAVE",
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self.current_tab, nil)
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end
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end
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--------------------------------------------------------------------------------
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local function show_tabview(self)
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self.hidden=false
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-- call for tab to enter
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if self.tablist[self.last_tab_index].on_change ~= nil then
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self.tablist[self.last_tab_index].on_change("ENTER",
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nil,self.current_tab)
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end
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end
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local tabview_metatable = {
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add = add_tab,
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handle_buttons = handle_buttons,
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handle_events = handle_events,
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get_formspec = get_formspec,
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show = show_tabview,
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hide = hide_tabview,
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delete = function(self) ui.delete(self) end,
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set_parent = function(self,parent) self.parent = parent end,
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set_autosave_tab =
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function(self,value) self.autosave_tab = value end,
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set_tab = set_tab_by_name,
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set_global_button_handler =
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function(self,handler) self.glb_btn_handler = handler end,
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set_global_event_handler =
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function(self,handler) self.glb_evt_handler = handler end,
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set_fixed_size =
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function(self,state) self.fixed_size = state end,
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tab_header = tab_header,
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handle_tab_buttons = handle_tab_buttons
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}
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tabview_metatable.__index = tabview_metatable
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--------------------------------------------------------------------------------
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function tabview_create(name, size, tabheaderpos)
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local self = {}
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self.name = name
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self.type = "toplevel"
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self.width = size.x
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self.height = size.y
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self.header_x = tabheaderpos.x
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self.header_y = tabheaderpos.y
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setmetatable(self, tabview_metatable)
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self.fixed_size = true
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self.hidden = true
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self.current_tab = nil
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self.last_tab_index = 1
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self.tablist = {}
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self.autosave_tab = false
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ui.add(self)
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return self
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end
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