From 4f5ecc60b1d4ca3cab4a92c236ba37a4e2b648fe Mon Sep 17 00:00:00 2001
From: Zughy <4279489-marco_a@users.noreply.gitlab.com>
Date: Sat, 18 Jun 2022 01:39:19 +0200
Subject: [PATCH] Allow to change a panel offset at runtime

---
 DOCS.md |  2 +-
 api.lua | 23 +++++++++++++++++++++--
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/DOCS.md b/DOCS.md
index 9b16c60..2493693 100644
--- a/DOCS.md
+++ b/DOCS.md
@@ -42,7 +42,7 @@ Install it as any other mod `¯\_(ツ)_/¯`
 * `hide()`: makes the panel disappear (but it's still assigned to the player)
 * `is_visible()`: whether the panel is currently displayed
 * `remove()`: deletes it
-* `update(panel_params, txt_elems, img_elems)`: updates only the mentioned parameters. Beware: `panel_params` only supports a few. They are `position`, `bg`, `title` and `title_color`.For instance, calling  
+* `update(panel_params, txt_elems, img_elems)`: updates only the mentioned parameters. Beware: `panel_params` only supports a few. They are `position`, `offset`, `bg`, `title` and `title_color`.For instance, calling  
 
 ```
 panel:update(nil, nil, {my_custom_img = {
diff --git a/api.lua b/api.lua
index b44b3ae..4de9c80 100644
--- a/api.lua
+++ b/api.lua
@@ -205,8 +205,7 @@ function Panel:update(def, txt_elems, img_elems)
     local player = minetest.get_player_by_name(self.player_name)
 
     for k, v in pairs(def) do
-      -- aggiorno eventuale posizione, che tratto a parte perché influisce sia su sfondo che titolo,
-      -- influenzando anche tutti i sottoelementi del pannello
+      -- aggiorno eventuale posizione, influenzando anche i vari sottoelementi
       if k == "position" then
         self.background_def.position = v
         self.title_def.position = v
@@ -224,6 +223,26 @@ function Panel:update(def, txt_elems, img_elems)
         player:hud_change(self.hud_id.bg_hud_id, k, v)
         player:hud_change(self.hud_id.text_hud_id, k, v)
 
+      -- aggiorno eventuale scostamento, influenzando anche i vari sottoelementi
+      elseif k == "offset" then
+        self.background_def.offset = v
+        self.title_def.offset = v
+
+        for _, elem in pairs(self.sub_img_elems) do
+          local HUD_ID = self.hud_id[elem]
+          local offset = { x = (v.x or 0) + (self[elem].offset.x or 0), y = (v.y or 0) + (self[elem].offset.y or 0)}
+          player:hud_change(HUD_ID, k, offset)
+        end
+
+        for _, elem in pairs(self.sub_txt_elems) do
+          local HUD_ID = self.hud_id[elem]
+          local offset = { x = (v.x or 0) + (self[elem].offset.x or 0), y = (v.y or 0) + (self[elem].offset.y or 0)}
+          player:hud_change(HUD_ID, k, offset)
+        end
+
+        player:hud_change(self.hud_id.bg_hud_id, k, v)
+        player:hud_change(self.hud_id.text_hud_id, k, v)
+
       -- aggiorno eventuale sfondo
       elseif k == "bg" then
         self.hud_text.bg_hud_txt = v