Add sfinv_buttons support

README.md

@@ -3,9 +3,11 @@ and power users.
 
 Current version: 1.2.0
 
-Use the server command `/treeform` to open the form. If you use Unified Inventory,
+If you use Minetest Game or Unified Inventory there's a new button in your
-there's a new button in your inventory menu for this. Usage help for this form is
+inventory menu for opening the form. Alternatively, you can always Use the
-provided in the form itself.
+server command `/treeform`.
+
+Usage help for this form is provided in the form itself.
 
 This mod also has an API for managing the tree database. See `API.md` for more
 information.

depends.txt

@@ -1 +1,2 @@
 unified_inventory?
+sfinv_buttons?

init.lua

@@ -1269,14 +1269,23 @@ minetest.register_on_joinplayer(ltool.join)
 
 minetest.register_on_shutdown(ltool.save_to_file)
 
+local button_action = function(player)
+	ltool.show_treeform(player:get_player_name())
+end
+
 if minetest.get_modpath("unified_inventory") ~= nil then
 	unified_inventory.register_button("ltool", {
 		type = "image",
 		image = "ltool_sapling.png",
 		tooltip = "L-System Tree Utility",
-		action = function(player)
+		action = button_action,
-			ltool.show_treeform(player:get_player_name())
-		end,
 	})
 end
 
+if minetest.get_modpath("sfinv_buttons") ~= nil then
+	sfinv_buttons.register_button("ltool", {
+		title = "L-System Tree Utility",
+		image = "ltool_sapling.png",
+		action = button_action,
+	})
+end