[Gambas-bugtracker] Bug #2879: No transparent Gambas Forms on LXDE Desktops

[<bugtracker@xxxxxxxxxxxxxx>]

http://gambaswiki.org/bugtracker/edit?object=BUG.2879&from=L21haW4-

Claus DIETRICH reported a new bug.

Summary
-------

No transparent Gambas Forms on LXDE Desktops

Type             : Request
Priority         : Low
Gambas version   : Master
Product          : Unknown


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

I am using slim distros as VMs and for aging hardware. After some years I tried again the LXDE desktop but experienced the same old problem. Transparent Gambas forms are not displayed as transparent - they are black. Please see attached screenshots of the desktop clock applet

- from a Debian 12 LXDE desktop and
- from a Debian or Mint Cinnamon/Mate/KDE desktop

The app is attached as well. The LXDE Window manager is openbox-lxde.

I hope (if possible as all) that the issue can be resolved.

With best regards
Claus


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

[System]
Gambas=3.19.90 2e049b3 (master)
OperatingSystem=Linux
Distribution=Debian GNU/Linux 12 (bookworm)
Kernel=6.1.0-18-amd64
Architecture=x86_64
Cores=1
Memory=3916M
Language=de_DE.UTF-8
Platform=x11
Desktop=LXDE
DesktopResolution=96
DesktopScale=7
WidgetTheme=clearlooks
Font=Sans,10
[Programs]
dpkg=Debian »dpkg« Paketmanagement-Programm Version 1.21.22 (amd64).
gcc=git version 2.39.2
git=msgmerge (GNU gettext-tools) 0.21
msgmerge=
[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.8.0
DBus=libdbus-1.so.3.32.4
GDK2=libgdk-x11-2.0.so.0.2400.33
GDK3=libgdk-3.so.0.2406.32
GStreamer=libgstreamer-1.0.so.0.2200.0
GTK+2=libgtk-x11-2.0.so.0.2400.33
GTK+3=libgtk-3.so.0.2406.32
OpenGL=libGL.so.1.7.0
Poppler=libpoppler.so.126.0.0
QT5=libQt5Core.so.5.15.8
RSvg=librsvg-2.so.2.48.0
SDL=libSDL2-2.0.so.0.2600.5
SQLite 3=libsqlite3.so.0.8.6
[Environment]
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=LXDE
DISPLAY=:0
GB_GUI=gb.gtk3
GDMSESSION=lightdm-xsession
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK_MODULES=gail:atk-bridge
HOME=<home>
LANG=de_DE.UTF-8
LC_ALL=de_DE.UTF-8
LOGNAME=<user>
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
PWD=<home>
QT_ACCESSIBILITY=1
QT_LOGGING_RULES=*.debug=false
SAL_USE_VCLPLUGIN=gtk
SHELL=/bin/bash
SSH_AGENT_PID=959
SSH_AUTH_SOCK=/tmp/ssh-XXXXXXSPU4TW/agent.860
TZ=:/etc/localtime
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg
XDG_CONFIG_HOME=<home>/.config
XDG_CURRENT_DESKTOP=LXDE
XDG_DATA_DIRS=/usr/local/share:/usr/share:/usr/share/gdm:/var/lib/menu-xdg:/usr/local/share/:/usr/share/:/usr/share/gdm/:/var/lib/menu-xdg/
XDG_DATA_HOME=<home>/.local/share
XDG_GREETER_DATA_DIR=/var/lib/lightdm/data/<user>
XDG_MENU_PREFIX=lxde-
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_CLASS=user
XDG_SESSION_DESKTOP=lightdm-xsession
XDG_SESSION_ID=2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7
_LXSESSION_PID=860


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