--- a/svghmi/widget_input.ysl2	Mon Aug 03 16:32:23 2020 +0200
+++ b/svghmi/widget_input.ysl2	Mon Aug 03 16:34:44 2020 +0200
@@ -26,9 +26,7 @@
     }
     |     },
     |     on_op_click: function(opstr) {
-    |         let orig = this.indexes[0];
-    |         let idx = this.offset ? orig - this.offset : orig;
-    |         let new_val = change_hmi_value(idx, opstr);
+    |         let new_val = change_hmi_value(this.get_idx(0), opstr);
     //     if "$have_value"{
     // |         this.value_elt.textContent = String(new_val);
     //           /* TODO gray out value until refreshed */
@@ -39,9 +37,7 @@
     |     },
 
     |     edit_callback: function(new_val) {
-    |         let orig = this.indexes[0];
-    |         let idx = this.offset ? orig - this.offset : orig;
-    |         apply_hmi_value(idx, new_val);
+    |         apply_hmi_value(this.get_idx(0), new_val);
     //     if "$have_value"{
     // |         this.value_elt.textContent = String(new_val);
     //           /* TODO gray out value until refreshed */