sistemati editing di campi numeri

pybusmonitor1553/gui/monitor.py

@@ -146,6 +146,7 @@ class MonitorApp(tk.Frame):
             self.detail_selected_label = getattr(self, 'detail_selected_label', None)
             self.detail_accessors = getattr(self, 'detail_accessors', {})
             self._flash_items = getattr(self, '_flash_items', {})
+            self._fields_being_edited = set()  # Track fields being edited to prevent refresh overwrite
             self._last_detail_update = 0.0
             try:
                 self.detail_tree.tag_configure('changed', background='lightyellow')
@@ -524,9 +525,11 @@ class MonitorApp(tk.Frame):
                     except Exception:
                         pass
                 else:
-                    # Add instant callback for editable entries (on Return key or focus loss)
-                    ent.bind('<Return>', lambda e, path=full: self._on_field_changed(path))
-                    ent.bind('<FocusOut>', lambda e, path=full: self._on_field_changed(path))
+                    # Add instant callbacks for editable entries
+                    # Mark as being edited when focused, apply when done
+                    ent.bind('<FocusIn>', lambda e, path=full: self._on_entry_focus_in(path))
+                    ent.bind('<Return>', lambda e, path=full: self._on_entry_finished(path))
+                    ent.bind('<FocusOut>', lambda e, path=full: self._on_entry_finished(path))
                 ent.pack(side=tk.RIGHT, fill=tk.X, expand=True)
                 widget = ('entry', ent)
 
@@ -537,6 +540,23 @@ class MonitorApp(tk.Frame):
             except Exception:
                 pass
 
+    def _on_entry_focus_in(self, field_path):
+        """Mark entry as being edited to prevent refresh from overwriting user input."""
+        try:
+            self._fields_being_edited.add(field_path)
+        except Exception:
+            pass
+    
+    def _on_entry_finished(self, field_path):
+        """Entry editing finished - apply value and allow refresh again."""
+        try:
+            # Apply the change first
+            self._on_field_changed(field_path)
+            # Remove from editing set so refresh can update it again
+            self._fields_being_edited.discard(field_path)
+        except Exception:
+            pass
+
     def _on_field_changed(self, field_path):
         """Callback when user changes a field value - apply change immediately to message."""
         try:
@@ -1546,6 +1566,10 @@ class MonitorApp(tk.Frame):
             
             for full, widget in list(self.form_widgets.items()):
                 try:
+                    # Skip fields that are currently being edited by user
+                    if full in getattr(self, '_fields_being_edited', set()):
+                        continue
+                    
                     # resolve the value from msg
                     val = None
                     try: