Improve UX when no game exists and drop default_game (#13550)

builtin/mainmenu/dlg_create_world.lua

@@ -91,16 +91,6 @@ local mgv6_biomes = {
 
 local function create_world_formspec(dialogdata)
 
-	-- Point the player to ContentDB when no games are found
-	if #pkgmgr.games == 0 then
-		return "size[8,2.5,true]" ..
-			"style[label_button;border=false]" ..
-			"button[0.5,0.5;7,0.5;label_button;" ..
-			fgettext("You have no games installed.") .. "]" ..
-			"button[0.5,1.5;2.5,0.5;world_create_open_cdb;" .. fgettext("Install a game") .. "]" ..
-			"button[5.0,1.5;2.5,0.5;world_create_cancel;" .. fgettext("Cancel") .. "]"
-	end
-
 	local current_mg = dialogdata.mg
 	local mapgens = core.get_mapgen_names()
 
@@ -310,8 +300,8 @@ local function create_world_formspec(dialogdata)
 		"label[0,2;" .. fgettext("Mapgen") .. "]"..
 		"dropdown[0,2.5;6.3;dd_mapgen;" .. mglist .. ";" .. selindex .. "]"
 
-	-- Warning if only devtest is installed
-	if #pkgmgr.games == 1 and pkgmgr.games[1].id == "devtest" then
+	-- Warning when making a devtest world
+	if game.id == "devtest" then
 		retval = retval ..
 			"container[0,3.5]" ..
 			"box[0,0;5.8,1.7;#ff8800]" ..

builtin/mainmenu/init.lua

@@ -87,15 +87,8 @@ local function init_globals()
 	menudata.worldlist:add_sort_mechanism("alphabetic", sort_worlds_alphabetic)
 	menudata.worldlist:set_sortmode("alphabetic")
 
-	local gameid = core.settings:get("menu_last_game")
-	local game = gameid and pkgmgr.find_by_gameid(gameid)
-	if not game then
-		gameid = core.settings:get("default_game") or "minetest"
-		game = pkgmgr.find_by_gameid(gameid)
-		core.settings:set("menu_last_game", gameid)
-	end
-
 	mm_game_theme.init()
+	mm_game_theme.reset()
 
 	-- Create main tabview
 	local tv_main = tabview_create("maintab", {x = 15.5, y = 7.1}, {x = 0, y = 0})
@@ -127,12 +120,6 @@ local function init_globals()
 		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
-		mm_game_theme.reset()
-	end
-
 	ui.set_default("maintab")
 	check_new_version()
 	tv_main:show()

builtin/mainmenu/tab_content.lua

@@ -18,7 +18,11 @@
 
 local packages_raw, packages
 
-local function get_formspec(tabview, name, tabdata)
+local function on_change(type)
+	if type ~= "ENTER" then
+		return
+	end
+
 	if not pkgmgr.global_mods then
 		pkgmgr.refresh_globals()
 	end
@@ -26,25 +30,25 @@ local function get_formspec(tabview, name, tabdata)
 		pkgmgr.update_gamelist()
 	end
 
-	if not packages then
-		packages_raw = {}
-		table.insert_all(packages_raw, pkgmgr.games)
-		table.insert_all(packages_raw, pkgmgr.get_texture_packs())
-		table.insert_all(packages_raw, pkgmgr.global_mods:get_list())
+	packages_raw = {}
+	table.insert_all(packages_raw, pkgmgr.games)
+	table.insert_all(packages_raw, pkgmgr.get_texture_packs())
+	table.insert_all(packages_raw, pkgmgr.global_mods:get_list())
 
-		local function get_data()
-			return packages_raw
-		end
-
-		local function is_equal(element, uid) --uid match
-			return (element.type == "game" and element.id == uid) or
-					element.name == uid
-		end
-
-		packages = filterlist.create(get_data, pkgmgr.compare_package,
-				is_equal, nil, {})
+	local function get_data()
+		return packages_raw
 	end
 
+	local function is_equal(element, uid) --uid match
+		return (element.type == "game" and element.id == uid) or
+				element.name == uid
+	end
+
+	packages = filterlist.create(get_data, pkgmgr.compare_package,
+			is_equal, nil, {})
+end
+
+local function get_formspec(tabview, name, tabdata)
 	if not tabdata.selected_pkg then
 		tabdata.selected_pkg = 1
 	end
@@ -227,5 +231,5 @@ return {
 	caption = fgettext("Content"),
 	cbf_formspec = get_formspec,
 	cbf_button_handler = handle_buttons,
-	on_change = pkgmgr.update_gamelist
+	on_change = on_change
 }

builtin/mainmenu/tab_local.lua

@@ -29,8 +29,24 @@ local current_port = core.settings:get("port")
 
 -- Currently chosen game in gamebar for theming and filtering
 function current_game()
-	local last_game_id = core.settings:get("menu_last_game")
-	local game = pkgmgr.find_by_gameid(last_game_id)
+	local gameid = core.settings:get("menu_last_game")
+	local game = gameid and pkgmgr.find_by_gameid(gameid)
+	-- Fall back to first game installed if one exists.
+	if not game and #pkgmgr.games > 0 then
+
+		-- If devtest is the first game in the list and there is another
+		-- game available, pick the other game instead.
+		local picked_game
+		if pkgmgr.games[1].id == "devtest" and #pkgmgr.games > 1 then
+			picked_game = 2
+		else
+			picked_game = 1
+		end
+
+		game = pkgmgr.games[picked_game]
+		gameid = game.id
+		core.settings:set("menu_last_game", gameid)
+	end
 
 	return game
 end
@@ -63,16 +79,12 @@ function singleplayer_refresh_gamebar()
 		old_bar:delete()
 	end
 
-	local function game_buttonbar_button_handler(fields)
-		if fields.game_open_cdb then
-			local maintab = ui.find_by_name("maintab")
-			local dlg = create_store_dlg("game")
-			dlg:set_parent(maintab)
-			maintab:hide()
-			dlg:show()
-			return true
-		end
+	-- Hide gamebar if no games are installed
+	if #pkgmgr.games == 0 then
+		return false
+	end
 
+	local function game_buttonbar_button_handler(fields)
 		for _, game in ipairs(pkgmgr.games) do
 			if fields["game_btnbar_" .. game.id] then
 				apply_game(game)
@@ -108,6 +120,7 @@ function singleplayer_refresh_gamebar()
 
 	local plus_image = core.formspec_escape(defaulttexturedir .. "plus.png")
 	btnbar:add_button("game_open_cdb", "", plus_image, fgettext("Install games from ContentDB"))
+	return true
 end
 
 local function get_disabled_settings(game)
@@ -137,6 +150,15 @@ local function get_disabled_settings(game)
 end
 
 local function get_formspec(tabview, name, tabdata)
+
+	-- Point the player to ContentDB when no games are found
+	if #pkgmgr.games == 0 then
+		return table.concat({
+			"style[label_button;border=false]",
+			"button[2.75,1.5;10,1;label_button;", fgettext("You have no games installed."), "]",
+			"button[5.25,3.5;5,1.2;game_open_cdb;", fgettext("Install a game"), "]"})
+	end
+
 	local retval = ""
 
 	local index = filterlist.get_current_index(menudata.worldlist,
@@ -237,6 +259,15 @@ local function main_button_handler(this, fields, name, tabdata)
 
 	assert(name == "local")
 
+	if fields.game_open_cdb then
+		local maintab = ui.find_by_name("maintab")
+		local dlg = create_store_dlg("game")
+		dlg:set_parent(maintab)
+		maintab:hide()
+		dlg:show()
+		return true
+	end
+
 	if this.dlg_create_world_closed_at == nil then
 		this.dlg_create_world_closed_at = 0
 	end
@@ -411,8 +442,9 @@ local function on_change(type, old_tab, new_tab)
 			apply_game(game)
 		end
 
-		singleplayer_refresh_gamebar()
-		ui.find_by_name("game_button_bar"):show()
+		if singleplayer_refresh_gamebar() then
+			ui.find_by_name("game_button_bar"):show()
+		end
 	else
 		menudata.worldlist:set_filtercriteria(nil)
 		local gamebar = ui.find_by_name("game_button_bar")