Xfce Forum

betw023

Member

Registered: 2024-10-06

Posts: 11

[Solved] QT app is not scaling in xfce, how to force it

I have windows scaling set to 2x on my 4k monitor and xfce works ok.

I have a program installed called converseen, it doesn't want to scale, also after click maximum window, the windows control buttons are outside of the screen not able to be seen.
How do I force this app or similar ones to use proper scaling? Thanks.

                 `:osssssss+-               OS: EndeavourOS x86_64
       `.://osssssssssssssssssssso++-       Shell: bash 5.2.37
      .://+ssssssssssssssssssssssso++:      Display (4K MONITOR): 3840x2160 @ 60 Hz in 32″ [External]
    .:///ossssssssssssssssssssssssso++:     DE: Xfce4 4.18
  `:////ssssssssssssssssssssssssssso+++.    WM: Xfwm4 (X11)
`-////+ssssssssssssssssssssssssssso++++-    WM Theme: Orchis-Dark-Compact
 `..-+oosssssssssssssssssssssssso+++++/`    Theme: Breeze-Dark [GTK2/3/4]
   ./++++++++++++++++++++++++++++++/:.      Icons: breeze-dark [GTK2/3/4]
  `:::::::::::::::::::::::::------``        Font: Sans (10pt) [GTK2/3/4]
                                            Cursor: breeze
                                            Terminal: xfce4-terminal 1.1.3

also kate, fcixt+rime input window are not scaling:

Last edited by betw023 (2024-10-11 11:40:38)

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64GB RAM running with a rescued broken Ryzen 5800X (half memory channel)

ToZ

Administrator

From: Canada

Registered: 2011-06-02

Posts: 11,482

Re: [Solved] QT app is not scaling in xfce, how to force it

Xfce is based on the GTK toolkit. Kate and coverseen (from what I can tell) are based on the QT toolkit. As such, you will need to manually configure those apps to scale as well. More information is available here.

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betw023

Member

Registered: 2024-10-06

Posts: 11

Re: [Solved] QT app is not scaling in xfce, how to force it

Thanks. I found out this.
For QT based apps, to let them scale , I can do this:
in .bash_profile add

export QT_AUTO_SCREEN_SCALE_FACTOR=2
export QT_ENABLE_HIGHDPI_SCALING=2
export QT_SCALE_FACTOR=2

ref https://forum.xfce.org/viewtopic.php?id=16870

On the other hand, other when setting scaling in other DE, both GTK and QT apps working fine. So maybe in xfce, a user setting the scaling action, could also write the enviroment variable for QT apps? or make it an option?

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64GB RAM running with a rescued broken Ryzen 5800X (half memory channel)