Downarrow button of DateEntry does not work with ttk default theme on Windows

[j4321]

In Windows, when clicking on the downarrow button of a DateEntry using ttk default syle for Windows, the drop-down calendar does not show up. On the contrary, every thing works fine with 'clam' theme.

It most likely comes from the fact that some themes are more configurable than others and for those one the custom style for the DateEntry does not work properly.

• Themes for which DateEntry is expected to work: alt, clam
• Themes for which a bug is expected: winnative, vista, xpnative

[j4321]

Temporary workaround: use a different theme:

style = ttk.Style()
style.theme_use('clam')