396 lines
12 KiB
Lua
396 lines
12 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 3.0 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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local defaulttexturedir = core.formspec_escape(defaulttexturedir)
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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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-- Hidden tabs have a negative index
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local i
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if tab.hidden then
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newtab.tabdata.hidden = true
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i = -1
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while self.tablist[i] do
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i = i - 1
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end
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else
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i = #self.tablist + 1
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end
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self.tablist[i] = newtab
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if self.last_tab_index == i 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 make_side_pane_tab(y, tab_name, tooltip, selected)
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local formspec = "style[" .. tab_name .. "_tab;bgimg=" ..
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defaulttexturedir .. tab_name
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if selected then
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formspec = formspec .. "_menu_selected.png]"
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else
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formspec = formspec .. "_menu.png;bgimg_hovered=" ..
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defaulttexturedir .. tab_name .. "_menu_hover.png]"
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end
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return formspec ..
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"image_button[12.1," .. y .. ";1,1.5;;" .. tab_name .. "_tab;;true;false]" ..
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"tooltip[" .. tab_name .. "_tab;" .. tooltip .. "]"
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end
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local function get_formspec(self)
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local formspec = ""
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if not self.hidden and (self.parent == nil or not self.parent.hidden) then
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local name = self.tablist[self.last_tab_index].name
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if self.parent == nil then
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local tsize = self.tablist[self.last_tab_index].tabsize or
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{width=self.width, height=self.height}
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formspec = formspec ..
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string.format("size[%f,%f,%s]",tsize.width + 2,tsize.height + 1,
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dump(self.fixed_size)) ..
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"bgcolor[#0000]" ..
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"container[1,1]" ..
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"background9[-0.2,-1.26;" .. tsize.width + 0.4 .. "," ..
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tsize.height + 1.75 .. ";" .. defaulttexturedir ..
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"bg_common.png;false;40]" ..
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"background9[12.13,1.05;0.9,2.6;" .. defaulttexturedir .. "side_menu.png;false;30]" ..
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make_side_pane_tab(0.9, "settings", fgettext("Settings"), name == "settings") ..
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"image[12.15,2.26;0.9,0.06;" .. defaulttexturedir .. "side_menu_divider.png]" ..
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make_side_pane_tab(2.3, "authors", fgettext("Credits"), name == "credits")
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end
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-- formspec = formspec .. self:tab_header()
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formspec = formspec .. self:button_header() ..
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self.tablist[self.last_tab_index].get_formspec(
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self,
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name,
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self.tablist[self.last_tab_index].tabdata,
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self.tablist[self.last_tab_index].tabsize
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)
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if self.parent == nil then
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formspec = formspec .. "container_end[]"
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end
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end
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return formspec
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end
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local set_tab_by_name
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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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if fields.authors_tab then
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set_tab_by_name(self, "credits")
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return true
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elseif fields.settings_tab then
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set_tab_by_name(self, "settings")
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return true
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end
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if self.tablist[self.last_tab_index].button_handler ~= nil then
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return
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self.tablist[self.last_tab_index].button_handler(
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self,
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fields,
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self.tablist[self.last_tab_index].name,
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self.tablist[self.last_tab_index].tabdata
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)
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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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if self.tablist[self.last_tab_index].evt_handler ~= nil then
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return
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self.tablist[self.last_tab_index].evt_handler(
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self,
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event,
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self.tablist[self.last_tab_index].name,
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self.tablist[self.last_tab_index].tabdata
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)
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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 captions = {}
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for i = 1, #self.tablist do
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captions[i] = self.tablist[i].caption
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end
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local toadd = table.concat(captions, ",")
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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,
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math.max(self.last_tab_index, 1))
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end]]
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--------------------------------------------------------------------------------
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local function button_header(self)
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local visible_tabs = {}
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local btn_widths = {}
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local total_width = 0
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for i, tab in ipairs(self.tablist) do
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if not tab.hidden and tab.caption ~= "" then
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visible_tabs[#visible_tabs + 1] = tab
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local w = utf8.len(core.get_translated_string(tab.caption))
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btn_widths[#visible_tabs] = w
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total_width = total_width + w
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end
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end
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local toadd = ""
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local coords_per_char = 12 / total_width
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-- The formspec is 15.4875 "real" coordinates wide
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-- local x = (12.39 - total_width) / 2 - 0.3
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local x = -0.1
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for i = 1, #visible_tabs do
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local caption = visible_tabs[i].caption
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local w = btn_widths[i] * coords_per_char
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local texture = "upper_buttons_middle"
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if i == 1 then
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texture = "upper_buttons_left"
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elseif i == #visible_tabs then
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texture = "upper_buttons_right"
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end
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local btn_name = self.name .. "_" .. i
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toadd = toadd ..
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"style[" .. btn_name .. ";padding=-10;bgimg=" .. defaulttexturedir ..
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texture
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if i == math.abs(self.last_tab_index) then
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toadd = toadd .. "_selected.png;"
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else
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toadd = toadd .. ".png;bgimg_hovered=" .. defaulttexturedir ..
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texture .. "_hover.png;"
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end
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toadd = toadd .. "bgimg_middle=20;content_offset=0]" ..
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"image_button[" .. x .. ",-1.1;" .. w + 0.22 .. ",0.9;;" ..
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btn_name .. ";" .. caption .. ";true;false]"
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x = x + w
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end
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return toadd
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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, self)
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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,self)
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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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local name_prefix = self.name .. "_"
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local name_prefix_len = #name_prefix
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for field in pairs(fields) do
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if field:sub(1, name_prefix_len) == name_prefix then
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local index = tonumber(field:sub(name_prefix_len + 1))
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if self.last_tab_index == index then return false end
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switch_to_tab(self, index)
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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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-- Declared as a local variable above handle_buttons
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function set_tab_by_name(self, name)
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-- This uses pairs so that hidden tabs (with a negative index) are searched
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-- as well
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for i, tab in pairs(self.tablist) do
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if tab.name == name then
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switch_to_tab(self, i)
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if name ~= "local" then
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mm_texture.set_dirt_bg()
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end
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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,self)
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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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button_header = button_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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