[Gambas-bugtracker] Bug #2772: Background image of the form changes according to the theme

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2772&from=L21haW4-

Gianluigi GRADASCHI reported a new bug.

Summary
-------

Background image of the form changes according to the theme

Type             : Bug
Priority         : Medium
Gambas version   : Master
Product          : Unknown


Description
-----------

Hi Benoit,
only today after months I noticed a malfunction for me.
If I create a background image for the transparent form, the image changes if the theme is dark.
See attached image of the CuckooClok.
This does not happen (at least here) with the other moon phase watch, see attached image, made months before and which uses the same technique.
Have you made any changes?
Is it possible to make the image stay the same?
Both projects are on the farm.

Regards
Gianluigi


System information
------------------

[System]
Gambas=3.18.90 d771aa9 (master)
OperatingSystem=Linux
Distribution=Linux Mint 21.2 Victoria
Kernel=5.15.0-78-generic
Architecture=x86_64
Cores=16
Memory=32000M
Language=it_IT.UTF-8
Desktop=CINNAMON
DesktopResolution=96
DesktopScale=7
WidgetTheme=mint-y-aqua
Font=Ubuntu,10

[Programs]
gcc=gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
git=git version 2.34.1
pngquant=2.12.2 (July 2019)

[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]
CINNAMON_VERSION=5.8.4
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=cinnamon
DISPLAY=:0
GB_GUI=gb.gtk3
GDMSESSION=cinnamon
GDM_LANG=it
GIO_LAUNCHED_DESKTOP_FILE=/usr/share/applications/gambas3.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=100764
GJS_DEBUG_OUTPUT=stderr
GJS_DEBUG_TOPICS=JS ERROR;JS LOG
GNOME_DESKTOP_SESSION_ID=this-is-deprecated
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK3_MODULES=xapp-gtk3-module
GTK_MODULES=gail:atk-bridge
HOME=/home/<hostname>
LANG=it_IT.UTF-8
LANGUAGE=it_IT.UTF-8
LC_ADDRESS=it_IT.UTF-8
LC_ALL=it_IT.UTF-8
LC_IDENTIFICATION=it_IT.UTF-8
LC_MEASUREMENT=it_IT.UTF-8
LC_MONETARY=it_IT.UTF-8
LC_NAME=it_IT.UTF-8
LC_NUMERIC=it_IT.UTF-8
LC_PAPER=it_IT.UTF-8
LC_TELEPHONE=it_IT.UTF-8
LC_TIME=it_IT.UTF-8
LOGNAME=<hostname>
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=/home/<hostname>
QT_ACCESSIBILITY=1
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1471,unix/<hostname>:/tmp/.ICE-unix/1471
SHELL=/bin/bash
SHLVL=0
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
USER=<hostname>
XAUTHORITY=/home/<hostname>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-cinnamon:/etc/xdg
XDG_CURRENT_DESKTOP=X-Cinnamon
XDG_DATA_DIRS=/usr/share/cinnamon:/usr/share/gnome:/home/<hostname>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<hostname>
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_CLASS=user
XDG_SESSION_DESKTOP=cinnamon
XDG_SESSION_ID=c2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7