Need way to switch between Dark and Light Mode regardless of System Mode

[ObedPM]

qBittorrent & operating system versions

qBittorrent: 5.0.0 x64
Operating system: Windows 10 Pro

What is the problem?

How can i change the dark theme? Is set up by default!

Steps to reproduce

No response

Additional context

No response

Log(s) & preferences file(s)

No response

[vivadavid]

Hi,

I have the same problem. I've just updated to version 5.0.0 and, out of the blue, dark mode is enabled by default and I can't find a way to switch back to light mode.

My Windows 11 has always been in dark mode, but, generally speaking, I prefer to have my programmes in light mode.

Is there a way to tell QbitTorrent 5.0.0 that, despite having dark mode in Windows 11, I prefer the programme in light mode?

Thanks!

[Pentaphon]

@ObedPM you should change the title of this issue to something like "Need way to switch between Dark and Light Mode regardless of System Mode".

[qBittUser]

@ObedPM

Is set up by default!

Yes, that's not a bug, qBittorrent v5+ changes theme based on your OS settings. It was made so to resolve Windows qBit users old feature request to have qBittorrent automatically support native Windows theme.

How can I change the dark theme?

1. Open qBittorrent > Tools > Options
2. Choose if you want to use a custom theme file or select Customizing UI Theme...

List of custom UI theme files are here:
https://github.com/qbittorrent/qBittorrent/wiki/List-of-known-qBittorrent-themes

If you dislike using custom UI theme files to switch between Light or Dark, then change your OS settings and qBittorrent v5+ will automatically switch to be similar to native system theme.

To customize Windows 10 & 11 theme:

1. Select Start > Settings or Right-click on your Desktop empty area.
2. Select Personalization > Colors.
3. In the list for Choose your mode, select it to be Custom, Light or Dark.

If you or anyone else wants more settings and theme related options to be built-in to qBittorrent, then you should create a new feature request.

Alternatively if you want to discuss and share ideas or wish to get more complex workarounds to make qBittorrent look how you want, then please use the Discussions page.

[xavier2k6]

For those that don't want qBittorrent v5 to automatically switch to Dark "App" mode, here are some choices:

1. Personalisation->Colours->Choose your color->Custom->Choose your default app mode->Light
   

2. Modify qt.conf file with WindowsArguments = darkmode=0 (this will disable qBittorrent's dark "app" mode support.)
   

[sledgehammer999]

If you want the native style (used in v4.6.x)
Launch qbittorrent.exe like this: <path-to-qbt>/qbittorrent.exe -style WindowsVista
The WindowsVista has limited supported for dark mode, if any at all.

The darkmode possible values are explained here: https://doc.qt.io/qt-6/qguiapplication.html#platform-specific-arguments

[sledgehammer999]

I wonder if we should provide an UI setting "Use native UI style (may disable dark mode)".

[xavier2k6]

I wonder if we should provide an UI setting "Use native UI style (may disable dark mode)".

and hinder HiDPI support as previously discussed

[sledgehammer999]

and hinder HiDPI support as previously discussed

Citation? I run HiDPI with fractional scaling and native style since qt5 and I haven't had issues. Can you point me to them?

[xavier2k6]

Revisit PR #19051

[electrifying]

If you want the native style (used in v4.6.x) Launch qbittorrent.exe like this: <path-to-qbt>/qbittorrent.exe -style WindowsVista The WindowsVista has limited supported for dark mode, if any at all.

The darkmode possible values are explained here: https://doc.qt.io/qt-6/qguiapplication.html#platform-specific-arguments

now we will always have to do this to get a non-broken interface?

[sledgehammer999]

Revisit PR #19051

AFAICT, you mentioned HiDPI here and I answered here. Aka Qt6 doesn't have a recommendation for Fusion+hidpi anymore.

[qBittUser]

@electrifying

now we will always have to do this to get a non-broken interface?

If something is broken, then a proper new issue report needs to be made.

[xavier2k6]

@electrifying

now we will always have to do this to get a non-broken interface?

If something is broken, then a proper new issue report needs to be made.

they came here from #21423

[xavier2k6]

Revisit PR #19051

AFAICT, you mentioned HiDPI here and I answered here. Aka Qt6 doesn't have a recommendation for Fusion+hidpi anymore.

ok, but Qt still prefer it (fusion style) in Qt 6 for Windows 11 (although....since then they now also have introduces a windows11 style)
#19051 (comment)

[xavier2k6]

Also, see my other #19051 (comment)

[sledgehammer999]

Revisit PR #19051

AFAICT, you mentioned HiDPI here and I answered here. Aka Qt6 doesn't have a recommendation for Fusion+hidpi anymore.

ok, but Qt still prefer it (fusion style) in Qt 6 for Windows 11 (although....since then they now also have introduces a windows11 style) #19051 (comment)

Sure. They recommend it for dark mode, regardless of hidpi.

[xavier2k6]

Qt 6 is Per-Monitor DPI Aware V2

https://doc.qt.io/qt-6/highdpi.html

Qt 5 was not.

[sledgehammer999]

Qt 6 is Per-Monitor DPI Aware V2

https://doc.qt.io/qt-6/highdpi.html

Qt 5 was not.

We have officially dropped qt5 support.

[sledgehammer999]

Of relevance to this issue:

It seems that 6.8 introduces a setter for the colorscheme to hint to the system the color mode an application wants. The system may not respect that. And it isn't clear from the docs if Windows will follow it.
Link: https://doc-snapshots.qt.io/qt6-6.8/qstylehints.html#colorScheme-prop

[xavier2k6]

Qt are always changing what they are doing/don't fully document changed behaviour etc...

look at what was happening to qBittorrent in earlier Qt 6.5 dark "app" mode support with accent color & I believe, it's changed again now.......talking about Windows here.

[vivadavid]

Thanks, @xavier2k6 : editing the config file worked for me. If light mode can be forced this way, is there a chance the feature can be accessed via the settings of the programme in a future release?

[xavier2k6]

is there a chance the feature can be accessed via the settings of the programme in a future release?

I'm not sure the config file can be edited during runtime but no doubt there'll be another solution provided in near future.

[vivadavid]

is there a chance the feature can be accessed via the settings of the programme in a future release?

I'm not sure the config file can be edited during runtime but no doubt there'll be another solution provided in near future.

I keep my fingers crossed! :-)

[SkiFire13]

Launch qbittorrent.exe like this: <path-to-qbt>/qbittorrent.exe -style WindowsVista

Is there a way to set this on autostart (hopefully in a way that's persistent after upgrades) and that doesn't require to set a global environment variable (i.e. QT_STYLE_OVERRIDE) that affects all Qt programs?