[issue15191] tkinter convenience dialogs don't use themed widgets

Changes by Mark Roseman : -- nosy: +markroseman ___ Python tracker ___ ___

[issue15191] tkinter convenience dialogs don't use themed widgets

New submission from Mark Summerfield m...@qtrac.eu: Some of the tkinter convenience dialogs, e.g., tkinter.filedialog.FileDialog, tkinter.scrolledtext.ScrolledText, tkinter.simpledialog.SimpleDialog, tkinter.simpledialog.Dialog, and tkinter.simpledialog._QueryDialog. Ideally they should use