keyword for file_dialog mode selection

src/View/Tools/ASubWindow.py

@@ -85,7 +85,7 @@ class WindowToolKit(object):
 
         return header, values
 
-    def file_dialog(self, select_file=None,
+    def file_dialog(self, select_file="ExistingFile",
                     callback=lambda x: None,
                     directory=None,
                     default_suffix=None,
@@ -107,11 +107,10 @@ class WindowToolKit(object):
 
         dialog = QFileDialog(self, options=options)
 
-        if select_file is not None:
-            if select_file:
-                mode = QFileDialog.FileMode.ExistingFile
-            else:
-                mode = QFileDialog.FileMode.Directory
+        if select_file == "Existing_file":
+            mode = QFileDialog.FileMode.ExistingFile
+        elif select_file == "Directory":
+            mode = QFileDialog.FileMode.Directory
         else:
             mode = QFileDialog.FileMode.AnyFile
 
@@ -119,7 +118,7 @@ class WindowToolKit(object):
         if directory is not None:
             dialog.setDirectory(directory)
 
-        if select_file is not False:
+        if select_file != "Directory":
             if default_suffix is not None:
                 dialog.setDefaultSuffix(default_suffix)