Add "more" menu in LVGL interface (#20940)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>

Marlin/Configuration_adv.h

 #endif
 
 /**
- * User-defined menu items that execute custom GCode
+ * User-defined menu items to run custom G-code.
+ * Up to 25 may be defined, but the actual number is LCD-dependent.
  */
 //#define CUSTOM_USER_MENUS
 #if ENABLED(CUSTOM_USER_MENUS)

Marlin/src/lcd/extui/lib/mks_ui/draw_more.cpp

 extern lv_group_t * g;
 static lv_obj_t * scr;
 
+#define HAS_USER_ITEM(N) (ENABLED(CUSTOM_USER_MENUS) && defined(USER_DESC_##N) && defined(USER_GCODE_##N))
+
 enum {
   ID_GCODE = 1,
-  ID_CUSTOM_1,
-  ID_CUSTOM_2,
-  ID_CUSTOM_3,
-  ID_CUSTOM_4,
-  ID_CUSTOM_5,
-  ID_CUSTOM_6,
+  #if HAS_USER_ITEM(1)
+    ID_CUSTOM_1,
+  #endif
+  #if HAS_USER_ITEM(2)
+    ID_CUSTOM_2,
+  #endif
+  #if HAS_USER_ITEM(3)
+    ID_CUSTOM_3,
+  #endif
+  #if HAS_USER_ITEM(4)
+    ID_CUSTOM_4,
+  #endif
+  #if HAS_USER_ITEM(5)
+    ID_CUSTOM_5,
+  #endif
+  #if HAS_USER_ITEM(6)
+    ID_CUSTOM_6,
+  #endif
   ID_M_RETURN,
 };
 
   if (event != LV_EVENT_RELEASED) return;
   switch (obj->mks_obj_id) {
     case ID_GCODE: lv_clear_more(); lv_draw_gcode(true); break;
-    case ID_CUSTOM_1: TERN_(USER_CMD_1_ENABLE, queue.inject_P(PSTR(USER_GCODE_1))); break;
-    case ID_CUSTOM_2: TERN_(USER_CMD_2_ENABLE, queue.inject_P(PSTR(USER_GCODE_2))); break;
-    case ID_CUSTOM_3: TERN_(USER_CMD_3_ENABLE, queue.inject_P(PSTR(USER_GCODE_3))); break;
-    case ID_CUSTOM_4: TERN_(USER_CMD_4_ENABLE, queue.inject_P(PSTR(USER_GCODE_4))); break;
-    case ID_CUSTOM_5: TERN_(USER_CMD_5_ENABLE, queue.inject_P(PSTR(USER_GCODE_5))); break;
-    case ID_CUSTOM_6: TERN_(USER_CMD_6_ENABLE, queue.inject_P(PSTR(USER_GCODE_6))); break;
+    #if HAS_USER_ITEM(1)
+      case ID_CUSTOM_1: queue.inject_P(PSTR(USER_GCODE_1)); break;
+    #endif
+    #if HAS_USER_ITEM(2)
+      case ID_CUSTOM_2: queue.inject_P(PSTR(USER_GCODE_2)); break;
+    #endif
+    #if HAS_USER_ITEM(3)
+      case ID_CUSTOM_3: queue.inject_P(PSTR(USER_GCODE_3)); break;
+    #endif
+    #if HAS_USER_ITEM(4)
+      case ID_CUSTOM_4: queue.inject_P(PSTR(USER_GCODE_4)); break;
+    #endif
+    #if HAS_USER_ITEM(5)
+      case ID_CUSTOM_5: queue.inject_P(PSTR(USER_GCODE_5)); break;
+    #endif
+    #if HAS_USER_ITEM(6)
+      case ID_CUSTOM_6: queue.inject_P(PSTR(USER_GCODE_6)); break;
+    #endif
     case ID_M_RETURN:
       lv_clear_more();
       lv_draw_tool();
   if (enc_ena) lv_group_add_obj(g, buttonGCode);
   lv_obj_t *labelGCode = lv_label_create_empty(buttonGCode);
 
-  #if ENABLED(USER_CMD_1_ENABLE)
+  #if HAS_USER_ITEM(1)
     lv_obj_t *buttonCustom1 = lv_imgbtn_create(scr, "F:/bmp_custom1.bin", BTN_X_PIXEL + INTERVAL_V * 2, titleHeight, event_handler, ID_CUSTOM_1);
     if (enc_ena) lv_group_add_obj(g, buttonCustom1);
     lv_obj_t *labelCustom1 = lv_label_create_empty(buttonCustom1);
   #endif
 
-  #if ENABLED(USER_CMD_2_ENABLE)
+  #if HAS_USER_ITEM(2)
     lv_obj_t *buttonCustom2 = lv_imgbtn_create(scr, "F:/bmp_custom2.bin", BTN_X_PIXEL * 2 + INTERVAL_V * 3, titleHeight, event_handler, ID_CUSTOM_2);
     if (enc_ena) lv_group_add_obj(g, buttonCustom2);
     lv_obj_t *labelCustom2 = lv_label_create_empty(buttonCustom2);
   #endif
 
-  #if ENABLED(USER_CMD_3_ENABLE)
+  #if HAS_USER_ITEM(3)
     lv_obj_t *buttonCustom3 = lv_imgbtn_create(scr, "F:/bmp_custom3.bin", BTN_X_PIXEL * 3 + INTERVAL_V * 4, titleHeight, event_handler, ID_CUSTOM_3);
     if (enc_ena) lv_group_add_obj(g, buttonCustom3);
     lv_obj_t *labelCustom3 = lv_label_create_empty(buttonCustom3);
   #endif
 
-  #if ENABLED(USER_CMD_4_ENABLE)
+  #if HAS_USER_ITEM(4)
     lv_obj_t *buttonCustom4 = lv_imgbtn_create(scr, "F:/bmp_custom4.bin", INTERVAL_V, BTN_Y_PIXEL + INTERVAL_H + titleHeight, event_handler, ID_CUSTOM_4);
     if (enc_ena) lv_group_add_obj(g, buttonCustom4);
     lv_obj_t *labelCustom4 = lv_label_create_empty(buttonCustom4);
   #endif
 
-  #if ENABLED(USER_CMD_5_ENABLE)
+  #if HAS_USER_ITEM(5)
     lv_obj_t *buttonCustom5 = lv_imgbtn_create(scr, "F:/bmp_custom5.bin", BTN_X_PIXEL + INTERVAL_V * 2, BTN_Y_PIXEL + INTERVAL_H + titleHeight, event_handler, ID_CUSTOM_5);
     if (enc_ena) lv_group_add_obj(g, buttonCustom5);
     lv_obj_t *labelCustom5 = lv_label_create_empty(buttonCustom5);
   #endif
 
-  #if ENABLED(USER_CMD_6_ENABLE)
+  #if HAS_USER_ITEM(6)
     lv_obj_t *buttonCustom6 = lv_imgbtn_create(scr, "F:/bmp_custom6.bin", BTN_X_PIXEL * 2 + INTERVAL_V * 3, BTN_Y_PIXEL + INTERVAL_H + titleHeight, event_handler, ID_CUSTOM_6);
     if (enc_ena) lv_group_add_obj(g, buttonCustom6);
     lv_obj_t *labelCustom6 = lv_label_create_empty(buttonCustom6);
     lv_label_set_text(labelGCode, more_menu.gcode);
     lv_obj_align(labelGCode, buttonGCode, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
 
-    #if ENABLED(USER_CMD_1_ENABLE)
+    #if HAS_USER_ITEM(1)
       lv_label_set_text(labelCustom1, more_menu.custom1);
       lv_obj_align(labelCustom1, buttonCustom1, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
-    #if ENABLED(USER_CMD_2_ENABLE)
+    #if HAS_USER_ITEM(2)
       lv_label_set_text(labelCustom2, more_menu.custom2);
       lv_obj_align(labelCustom2, buttonCustom2, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
-    #if ENABLED(USER_CMD_3_ENABLE)
+    #if HAS_USER_ITEM(3)
       lv_label_set_text(labelCustom3, more_menu.custom3);
       lv_obj_align(labelCustom3, buttonCustom3, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
-    #if ENABLED(USER_CMD_4_ENABLE)
+    #if HAS_USER_ITEM(4)
       lv_label_set_text(labelCustom4, more_menu.custom4);
       lv_obj_align(labelCustom4, buttonCustom4, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
-    #if ENABLED(USER_CMD_5_ENABLE)
+    #if HAS_USER_ITEM(5)
       lv_label_set_text(labelCustom5, more_menu.custom5);
       lv_obj_align(labelCustom5, buttonCustom5, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
-    #if ENABLED(USER_CMD_6_ENABLE)
+    #if HAS_USER_ITEM(6)
       lv_label_set_text(labelCustom6, more_menu.custom6);
       lv_obj_align(labelCustom6, buttonCustom6, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
     #endif
   #if BUTTONS_EXIST(EN1, EN2, ENC)
     if (enc_ena) {
       lv_group_add_obj(g, buttonGCode);
-      TERN_(USER_CMD_1_ENABLE, lv_group_add_obj(g, buttonCustom1));
-      TERN_(USER_CMD_2_ENABLE, lv_group_add_obj(g, buttonCustom2));
-      TERN_(USER_CMD_3_ENABLE, lv_group_add_obj(g, buttonCustom3));
-      TERN_(USER_CMD_4_ENABLE, lv_group_add_obj(g, buttonCustom4));
-      TERN_(USER_CMD_5_ENABLE, lv_group_add_obj(g, buttonCustom5));
-      TERN_(USER_CMD_6_ENABLE, lv_group_add_obj(g, buttonCustom6));
+      #if HAS_USER_ITEM(1)
+        lv_group_add_obj(g, buttonCustom1);
+      #endif
+      #if HAS_USER_ITEM(2)
+        lv_group_add_obj(g, buttonCustom2);
+      #endif
+      #if HAS_USER_ITEM(3)
+        lv_group_add_obj(g, buttonCustom3);
+      #endif
+      #if HAS_USER_ITEM(4)
+        lv_group_add_obj(g, buttonCustom4);
+      #endif
+      #if HAS_USER_ITEM(5)
+        lv_group_add_obj(g, buttonCustom5);
+      #endif
+      #if HAS_USER_ITEM(6)
+        lv_group_add_obj(g, buttonCustom6);
+      #endif
       lv_group_add_obj(g, buttonBack);
     }
   #endif

Marlin/src/lcd/extui/lib/mks_ui/draw_tool.cpp

       uiCfg.desireSprayerTempBak = thermalManager.temp_hotend[uiCfg.curSprayerChoose].target;
       lv_draw_filament_change();
       break;
-    case ID_T_MORE: lv_draw_more(); break;
+    case ID_T_MORE:
+      lv_draw_more();
+      break;
     case ID_T_RETURN:
       TERN_(MKS_TEST, curent_disp_ui = 1);
       lv_draw_ready_print();