Replace settings tab with button

builtin/fstk/tabview.lua

@@ -66,8 +66,8 @@ local function get_formspec(self)
 
 	local content, prepend = tab.get_formspec(self, tab.name, tab.tabdata, tab.tabsize)
 
+	local tsize = tab.tabsize or { width = self.width, height = self.height }
 	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))
 
@@ -76,7 +76,28 @@ local function get_formspec(self)
 		end
 	end
 
-	local formspec = (prepend or "") .. self:tab_header() .. content
+	local end_button_size = 0.75
+
+	local tab_header_size = { width = tsize.width, height = 0.85 }
+	if self.end_button then
+		tab_header_size.width = tab_header_size.width - end_button_size - 0.1
+	end
+
+	local formspec = (prepend or "") .. self:tab_header(tab_header_size) .. content
+
+	if self.end_button then
+		formspec = formspec ..
+				("style[%s;noclip=true;border=false]"):format(self.end_button.name) ..
+				("tooltip[%s;%s]"):format(self.end_button.name, self.end_button.label) ..
+				("image_button[%f,%f;%f,%f;%s;%s;]"):format(
+						self.width - end_button_size,
+						(-tab_header_size.height - end_button_size) / 2,
+						end_button_size,
+						end_button_size,
+						core.formspec_escape(self.end_button.icon),
+						self.end_button.name)
+	end
+
 	return formspec
 end
 
@@ -91,8 +112,12 @@ local function handle_buttons(self,fields)
 		return true
 	end
 
+	if self.end_button and fields[self.end_button.name] then
+		return self.end_button.on_click(self)
+	end
+
 	if self.glb_btn_handler ~= nil and
-		self.glb_btn_handler(self,fields) then
+		self.glb_btn_handler(self, fields) then
 		return true
 	end
 
@@ -126,8 +151,7 @@ end
 
 
 --------------------------------------------------------------------------------
-local function tab_header(self)
-
+local function tab_header(self, size)
 	local toadd = ""
 
 	for i=1,#self.tablist,1 do
@@ -138,8 +162,8 @@ local function tab_header(self)
 
 		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);
+	return string.format("tabheader[%f,%f;%f,%f;%s;%s;%i;true;false]",
+			self.header_x, self.header_y, size.width, size.height, self.name, toadd, self.last_tab_index)
 end
 
 --------------------------------------------------------------------------------
@@ -230,6 +254,8 @@ local tabview_metatable = {
 			function(self,handler) self.glb_evt_handler = handler end,
 	set_fixed_size =
 			function(self,state) self.fixed_size = state end,
+	set_end_button =
+			function(self, v) self.end_button = v end,
 	tab_header = tab_header,
 	handle_tab_buttons = handle_tab_buttons
 }

builtin/mainmenu/init.lua

@@ -51,30 +51,13 @@ dofile(menupath .. DIR_DELIM .. "dlg_register.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_rename_modpack.lua")
 dofile(menupath .. DIR_DELIM .. "dlg_version_info.lua")
 
-local tabs = {}
-
-tabs.settings = {
-	name = "settings",
-	caption = fgettext("Settings"),
-	cbf_formspec = function()
-		return "button[0.1,0.1;3,0.8;open_settings;" .. fgettext("Open Settings") .. "]"
-	end,
-	cbf_button_handler = function(tabview, fields)
-		if fields.open_settings then
-			local dlg = create_settings_dlg()
-			dlg:set_parent(tabview)
-			tabview:hide()
-			dlg:show()
-			return true
-		end
-	end,
+local tabs = {
+	content  = dofile(menupath .. DIR_DELIM .. "tab_content.lua"),
+	about = dofile(menupath .. DIR_DELIM .. "tab_about.lua"),
+	local_game = dofile(menupath .. DIR_DELIM .. "tab_local.lua"),
+	play_online = dofile(menupath .. DIR_DELIM .. "tab_online.lua")
 }
 
-tabs.content  = dofile(menupath .. DIR_DELIM .. "tab_content.lua")
-tabs.about    = dofile(menupath .. DIR_DELIM .. "tab_about.lua")
-tabs.local_game = dofile(menupath .. DIR_DELIM .. "tab_local.lua")
-tabs.play_online = dofile(menupath .. DIR_DELIM .. "tab_online.lua")
-
 --------------------------------------------------------------------------------
 local function main_event_handler(tabview, event)
 	if event == "MenuQuit" then
@@ -121,7 +104,6 @@ local function init_globals()
 	tv_main:add(tabs.local_game)
 	tv_main:add(tabs.play_online)
 	tv_main:add(tabs.content)
-	tv_main:add(tabs.settings)
 	tv_main:add(tabs.about)
 
 	tv_main:set_global_event_handler(main_event_handler)
@@ -132,6 +114,19 @@ local function init_globals()
 		tv_main:set_tab(last_tab)
 	end
 
+	tv_main:set_end_button({
+		icon = defaulttexturedir .. "settings_btn.png",
+		label = fgettext("Settings"),
+		name = "open_settings",
+		on_click = function(tabview)
+			local dlg = create_settings_dlg()
+			dlg:set_parent(tabview)
+			tabview:hide()
+			dlg:show()
+			return true
+		end,
+	})
+
 	-- In case the folder of the last selected game has been deleted,
 	-- display "Minetest" as a header
 	if tv_main.current_tab == "local" and not game then

doc/fst_api.txt

@@ -85,6 +85,12 @@ methods:
   ^ delete tabview
 - set_fixed_size(state)
   ^ true/false set to fixed size, variable size
+- set_end_button(info)
+  ^ info is a table with:
+      * name: button name
+      * label: tooltip text
+      * icon: path to icon
+      * on_click(tabview): callback function
 
 File: fst/dialog.lua
 ---------------------