feat: 完善参数化关系式与SCDM模型修改验证

step_editor/window_core.py

@@ -179,12 +179,48 @@ class WindowCoreMixin:
         elif watched is getattr(self, "property_table", None):
             if event.type() == QEvent.Type.Resize and hasattr(self, "_resize_property_table_columns"):
                 QTimer.singleShot(0, self._resize_property_table_columns)
+        elif watched is self._relation_formula_popup_widget():
+            if event.type() == QEvent.Type.KeyPress and event.key() == Qt.Key.Key_Backspace:
+                editor = getattr(self, "relation_formula_input", None)
+                popup = self._relation_formula_popup_widget()
+                if editor is not None and hasattr(editor, "backspace"):
+                    if popup is not None and hasattr(popup, "hide"):
+                        popup.hide()
+                    if hasattr(editor, "setFocus"):
+                        editor.setFocus(Qt.FocusReason.OtherFocusReason)
+                    editor.backspace()
+                    if hasattr(self, "_update_relation_formula_completions"):
+                        QTimer.singleShot(0, self._update_relation_formula_completions)
+                    event.accept()
+                    return True
         elif watched is getattr(self, "relation_formula_input", None):
-            if event.type() == QEvent.Type.KeyPress and event.key() == Qt.Key.Key_Tab:
+            if event.type() == QEvent.Type.MouseButtonPress:
+                if hasattr(self, "_hide_relation_formula_completion_popup"):
+                    self._hide_relation_formula_completion_popup()
+                if hasattr(watched, "setFocus"):
+                    watched.setFocus(Qt.FocusReason.MouseFocusReason)
+            if event.type() in {QEvent.Type.ShortcutOverride, QEvent.Type.KeyPress} and event.key() == Qt.Key.Key_Tab:
+                if bool(getattr(self, "_relation_formula_tab_completion_accepted", False)):
+                    self._relation_formula_tab_completion_accepted = False
+                    event.accept()
+                    return True
                 if hasattr(self, "_accept_relation_formula_completion") and self._accept_relation_formula_completion():
+                    self._relation_formula_tab_completion_accepted = event.type() == QEvent.Type.ShortcutOverride
+                    if self._relation_formula_tab_completion_accepted:
+                        QTimer.singleShot(0, lambda: setattr(self, "_relation_formula_tab_completion_accepted", False))
+                    event.accept()
                     return True
         return super().eventFilter(watched, event)
 
+    def _relation_formula_popup_widget(self):
+        completer = getattr(self, "relation_formula_completer", None)
+        if completer is None or not hasattr(completer, "popup"):
+            return None
+        try:
+            return completer.popup()
+        except RuntimeError:
+            return None
+
     def _should_suppress_transient_tooltip(self, watched) -> bool:
         if not isinstance(watched, QWidget):
             return False
@@ -1274,6 +1310,8 @@ class WindowCoreMixin:
             self.load_in_progress = False
             self.pending_load_path = None
             self._update_action_states()
+            if hasattr(self, "_update_relation_formula_buttons"):
+                self._update_relation_formula_buttons()
             if float(getattr(self, "preview_load_deflection", 0.0) or 0.0) > float(
                 getattr(self, "initial_load_deflection", 0.0) or 0.0
             ):
@@ -1337,6 +1375,8 @@ class WindowCoreMixin:
         self.load_in_progress = False
         self.pending_load_path = None
         self._update_action_states()
+        if hasattr(self, "_update_relation_formula_buttons"):
+            self._update_relation_formula_buttons()
         self._request_thread_quit(self.load_thread)
         self._request_thread_quit(self.load_refine_thread)
 
@@ -1387,6 +1427,8 @@ class WindowCoreMixin:
         self.redo_stack.clear()
         self.operation_history.clear()
         self.redo_history.clear()
+        if hasattr(self, "_clear_relation_formula_runtime_state"):
+            self._clear_relation_formula_runtime_state(clear_items=True)
         self.clear_diff_preview(render=False)
         if hasattr(self, "history_list"):
             self.history_list.clear()