Time/date format: warning message for users when they change format to another start date

src/View/Study/Window.py

@@ -19,7 +19,7 @@
 import logging
 
 from datetime import datetime
-from tools import get_user_name
+from tools import get_user_name, parse_datetime, format_datetime
 
 from Modules import Modules
 from Model.Study import Study
@@ -34,7 +34,7 @@ from PyQt5.QtGui import (
 from PyQt5.QtWidgets import (
     QRadioButton, QLabel, QDateTimeEdit,
     QTextEdit, QPlainTextEdit, QTextBrowser,
-    QPushButton,
+    QPushButton, QMessageBox,
 )
 
 _translate = QCoreApplication.translate
@@ -156,6 +156,27 @@ All right reserved.
             self.find(QDateTimeEdit, "dateTimeEdit_date").setEnabled(True)
 
     def accept(self):
+        # if (self._study is not None
+        #     and self._study.time_system == "date"
+        #     and self.get_radio_button("radioButton_date")):
+        #     old_date = parse_datetime(self._study.date)
+        #     new_date = parse_datetime(self.get_datetime_edit("dateTimeEdit_date"))
+        #     if new_date != old_date:
+        #         answer = QMessageBox.question(
+        #             self,
+        #             _translate("Study", "Change simulation start date?"),
+        #             _translate(
+        #                 "Study",
+        #                 "All displayed data dates will shift with the simulation start."
+        #                 "\nTheir elapsed simulation times will remain unchanged."
+        #                 "\n\nPrevious start: {old}\nNew start: {new}"
+        #             ).format(old=format_datetime(old_date), new=format_datetime(new_date)),
+        #             QMessageBox.Ok | QMessageBox.Cancel,
+        #             QMessageBox.Cancel
+        #         )
+        #         if answer != QMessageBox.Ok:
+        #             return
+
         name = self.get_line_edit_text("lineEdit_name")
         description = self.get_plaintext_edit_text("plainTextEdit_description")