Re: How to enable dark mode in gambas qt5 application in ubuntu?

[Bruce Steers <bsteers4@xxxxxxxxx>]

You can force it with the env

Env["GB_GUI_DARK_THEME"] = 1

Set before any gui component loads
but that will "force" dark theme not "detect" it.

Perhaps if you add a "Force dark theme" option to your program to choose?
But i guess really it's a bug that it's not detected in your case.

Respects
BruceS

On Wed, 12 Jun 2024, 18:01 Safiur Rahman, <isafiur@xxxxxxxxx> wrote:

> Hi
>
> I have Ubuntu 22.04 OS (XDG_CURRENT_DESKTOP=ubuntu:GNOME). The
> widget-theme is Yaru-Dark when dark mode is enabled from the Appearance
> setting.
>
> When I create a gambas application using gb.gui or gb.gtk4 the resultant
> application takes the dark theme. However when I use gb.gui.qt or gb.qt5
> the resultant application doesn't take a dark theme. The reason I have to
> stick to gb.qt5 is due to Textedit control in gb.gui.qt.ext and gb.qt5.ext.
>
> How can I enable dark mode in gambas qt5 application in ubuntu?
>
> [System]
> Gambas=3.19.2
> OperatingSystem=Linux
> Distribution=Ubuntu 22.04.4 LTS (Jammy Jellyfish)
> Kernel=6.5.0-35-generic
> Architecture=x86_64
> Cores=4
> Memory=3788M
> Language=en_US.UTF-8
> Platform=x11
> Desktop=UBUNTU
> DesktopResolution=96
> DesktopScale=8
> WidgetTheme=yaru-dark
> Font=Ubuntu,11
> [Programs]
> dpkg=Debian 'dpkg' package management program version 1.21.1 (amd64).
> gcc=gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
> msgmerge=msgmerge (GNU gettext-tools) 0.21
> rpmbuild=RPM version 4.17.0
> [Libraries]
> Cairo=libcairo.so.2.11600.0
> Curl=libcurl.so.4.7.0
> DBus=libdbus-1.so.3.19.13
> GDK2=libgdk-x11-2.0.so.0.2400.33
> GDK3=libgdk-3.so.0.2404.29
> GStreamer=libgstreamer-1.0.so.0.2003.0
> GTK+2=libgtk-x11-2.0.so.0.2400.33
> GTK+3=libgtk-3.so.0.2404.29
> OpenGL=libGL.so.1.7.0
> Poppler=libpoppler.so.118.0.0
> QT5=libQt5Core.so.5.15.3
> RSvg=librsvg-2.so.2.48.0
> SDL=libSDL2-2.0.so.0.18.2
> SQLite 3=libsqlite3.so.0.8.6
> [Environment]
> DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
> DESKTOP_SESSION=ubuntu-xorg
> DISPLAY=:0
> GB_GUI=gb.gtk3
> GDMSESSION=ubuntu-xorg
> GIO_LAUNCHED_DESKTOP_FILE=/usr/share/applications/gambas3.desktop
> GIO_LAUNCHED_DESKTOP_FILE_PID=7503
> GJS_DEBUG_OUTPUT=stderr
> GJS_DEBUG_TOPICS=JS ERROR;JS LOG
> GNOME_DESKTOP_SESSION_ID=this-is-deprecated
> GNOME_SHELL_SESSION_MODE=ubuntu
> GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
> GTK_IM_MODULE=ibus
> GTK_MODULES=gail:atk-bridge
> HOME=<home>
> INVOCATION_ID=8a65427b929f4bb699425e759f744764
> JOURNAL_STREAM=8:31701
> LANG=en_US.UTF-8
> LC_ADDRESS=bho_NP
> LC_ALL=en_US.UTF-8
> LC_IDENTIFICATION=bho_NP
> LC_MEASUREMENT=bho_NP
> LC_MONETARY=bho_NP
> LC_NAME=bho_NP
> LC_NUMERIC=bho_NP
> LC_PAPER=bho_NP
> LC_TELEPHONE=bho_NP
> LC_TIME=bho_NP
> LOGNAME=<user>
> MANAGERPID=1642
>
> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin
> PWD=<home>
> QT_ACCESSIBILITY=1
> QT_IM_MODULE=ibus
> QT_LOGGING_RULES=*.debug=false
>
> SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1875,unix/<hostname>:/tmp/.ICE-unix/1875
> SHELL=/bin/bash
> SHLVL=0
> SSH_AGENT_LAUNCHER=gnome-keyring
> SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
> SYSTEMD_EXEC_PID=1898
> TZ=:/etc/localtime
> USER=<user>
> USERNAME=<user>
> WINDOWPATH=2
> XAUTHORITY=/run/user/1000/gdm/Xauthority
> XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu-xorg:/etc/xdg
> XDG_CURRENT_DESKTOP=ubuntu:GNOME
>
> XDG_DATA_DIRS=/usr/share/ubuntu-xorg:/usr/share/gnome:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
> XDG_MENU_PREFIX=gnome-
> XDG_RUNTIME_DIR=/run/user/1000
> XDG_SESSION_CLASS=user
> XDG_SESSION_DESKTOP=ubuntu-xorg
> XDG_SESSION_TYPE=x11
> XMODIFIERS=@im=ibus
>
> --
> Regards
> Safiur Rahman
>