Setting output folder and displaying this information

tugui/main.py

@@ -35,6 +35,10 @@ class TuPostProcessingGui(tk.Tk):
   . the plot area (right side) where the selected curves are shown
   . a status bar (bottom window) showing log messages.
   """
+
+  # Flag stating if the output directory has been set directly
+  __is_dir_directly_set: bool = False
+
   def __init__(self, window_title: str, width: int, height: int) -> None:
     """
     App windows's constructor
@@ -358,6 +362,12 @@ def retrieve_simulation_info(self) -> None:
       self.plireader = PliReader.init_PliReader(self.pli_entry.var.get())
       print("Path to the .pli file: " + self.plireader.pli_path)
 
+      # Update the default directory of the file selection window and, if not
+      # already done, set the output directory to the one of the currently
+      # opened file
+      self.__set_directories_and_status_message(
+        self.plireader.pli_path, "Selected .pli file: ")
+
       # Instantiate the MacReader class
       self.macreader = MacReader(
         os.path.dirname(self.plireader.pli_path) + os.sep + self.plireader.mac_path,
@@ -774,6 +784,16 @@ def select_output_folder(self, event: Union[tk.Event, None] = None) -> None:
 
     # Update the output directory to the one currently selected
     self.output_dir = foldername
+    # Update the output directory to the one currently selected
+    self.__is_dir_directly_set = True
+
+    # Provide a message to the status bar and to the log file
+    mssg = self.status_bar.label.cget('text').split(',')
+    if mssg[0]:
+        output_message = mssg[0] + ", Output folder: " + self.output_dir
+    else:
+        output_message = "Selected output folder: " + self.output_dir
+    self.status_bar.set_text(output_message)
 
     print("Selected output folder:", self.output_dir)
 
@@ -796,11 +816,11 @@ def load_inp_file(self, event: Union[tk.Event, None] = None) -> None:
 
     # Store the selected file as an instance attribute
     self.loaded_inp_file = filename
-    # Change the start directory for the file selection window
-    self.initial_dir = os.path.dirname(filename)
-
-    # Provide a message to the status bar
-    self.status_bar.set_text("Selected .inp file: " + self.loaded_inp_file)
+    # Update the default directory of the file selection window and, if not
+    # already done, set the output directory to the one of the currently
+    # opened file
+    self.__set_directories_and_status_message(
+      self.loaded_inp_file, "Loaded .inp file: ")
 
     # Generate the '<<InpLoaded>>' virtual event
     self.event_generate('<<InpLoaded>>')
@@ -984,6 +1004,42 @@ def reset_main_window(self, event: Union[tk.Event, None] = None) -> None:
     self.status_bar.set_text("")
     # Re-build the plot tabs
     self.build_tabs_area()
+    # Delete the output directory attribute, if any
+    if hasattr(self, 'output_dir'):
+      delattr(self, 'output_dir')
+
+  def __set_directories_and_status_message(
+      self, file_name: str, first_text: str) -> None:
+    """
+    Method that updates the default directory of the file selection window
+    with the one of the currently loaded .pli or .inp file.
+    The same is performed for the output directory, if it has not already
+    been set directly by the user.
+    A descriptive message is assembled by prefixing it with the given string
+    and indicating the path of the output folder.
+    The status bar widget is updated with the assembled text.
+
+    Parameters
+    ----------
+    file_name : str
+      The path of the selected file.
+    first_text : str
+      The first part of the text message shown in the status bar widget.
+    """
+    # Update the default directory of the file selection window to the one of
+    # the currently opened file
+    self.initial_dir = os.path.dirname(file_name)
+    # If not already done, set the output directory to the one of the
+    # currently opened file
+    if not hasattr(self, 'output_dir') or not self.__is_dir_directly_set:
+      self.output_dir = self.initial_dir
+
+    # Provide a message to the status bar and to the log file
+    output_message = (first_text + file_name + ", Output folder: "
+                      + self.output_dir)
+    self.status_bar.set_text(output_message)
+    # FIXME: to print into log file
+    print(output_message)
 
 
 def new_postprocessing(event: Union[tk.Event, None] = None) -> None: