The Dark Theme setting does not immediately reflect the change to the system level setting

[gexgd0419]

Describe the bug
I know that to fully apply the light/dark theme change, you may still have to restart Sandboxie.
But when you change the setting manually in Sandboxie's global options, it will try to redraw the UI to reflect the theme change.
However, when the dark theme setting is set to follow the Windows system setting, and the system level setting is changed when Sandboxie is running, Sandboxie will not change its theme or redraw anything. It will keep its current theme until you restart Sandboxie.

Expected behavior
Sandboxie should change its theme when its theme is set to follow the system theme and the system theme changes.

System details

• Sandboxie Plus v0.9.6

[isaak654]

Sandboxie should change its theme when its theme is set to follow the system theme and the system theme changes.

Personally I would suggest an additional option to follow the default Windows color setting for dark/light mode instead of the non-intuitive three values for the same checkbox:

[DavidXanatos]

I see, but do peopel so often switch? Is there a system wide message issued when the change occurs or would I have to monitor the registry key for changes continuously?

[gexgd0419]

As far as I know, when apps' theme mode, system's theme mode, and/or the accent color changed (or other theme-related settings such as transparency), there will usually be two kinds of broadcast messages:

• WM_SETTINGCHANGE message (lParam points to string "ImmersiveColorSet"), and
• WM_DWMCOLORIZATIONCOLORCHANGED message.

Those messages will be broadcast even if you directly changed the corresponding registry value.

From the section name "ImmersiveColorSet", I can assume that the program will not receive such WM_SETTINGCHANGE messages when it is running under Windows 7 or earlier Windows systems.
But DWM does exist in Windows 7, which means that if you changed the colorization settings in Windows 7, the program will receive a WM_DWMCOLORIZATIONCOLORCHANGED message, even though Windows 7 doesn't have a system-level dark theme setting.

Also, I found that changing theme once will issue multiple WM_SETTINGCHANGE and WM_DWMCOLORIZATIONCOLORCHANGED messages in Windows 10.

Haven't tested it on Windows 8 or 8.1.

[DavidXanatos]

great! will be fixed in next build then :)