Tkinter modern dialogue box suddenly not working-CodePudding

I use the following code to show dialogue boxes:

from tkinter.ttk import *
from tkinter import messagebox
messagebox.showerror(title='xx', message='xxx')

And I use PyInstaller to compile into exe. Today I found out that the modern themed dialogue box is no longer there. I downloaded the exe binary built a month ago, the dialogue box are modern themed, however, the one I just built are no longer. The code relevant to the box are exactly the same, and I am running on exactly the same system. I do not understand where the issue could be.

Here is an example of modern and old:

Old:

New:

As you can see, the buttons are completely different.

Both binaries are built with Python 3.9.8 and latest development build of PyInstaller

CodePudding user response：

Solved it myself after discussing with PyInstaller maintainer. (See here: https://github.com/pyinstaller/pyinstaller/discussions/6366)

The problem is that in Python 3.9.8 they dropped a Windows dependency that enables the modern UI support. This was a change made from 3.9.7 to 3.9.8. To work around this, you have to specify your own manifest file and add the following content into it:

  <dependency>
    <dependentAssembly>
      <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" language="*" processorArchitecture="*" version="6.0.0.0" publicKeyToken="6595b64144ccf1df"/>
      <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1"/>
    </dependentAssembly>
  </dependency>

Update: This is fixed in latest PyInstaller development build: https://github.com/pyinstaller/pyinstaller/pull/6367