[Gambas-bugtracker] Bug #1857: Malfunction with the Visible property of the Form

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.1857&from=L21haW4-

Gianluigi GRADASCHI reported a new bug.

Summary
-------

Malfunction with the Visible property of the Form

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


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

The Visible property of the Form shows a malfunction of the Y position of the form on its redraw (moving the form up).
This only happens with the gb.gui.qt. component.
Instead with the gb.gui component it works correctly.
To block the movement, uncomment the line of code.
See attached Test2


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

[System]
Gambas=3.15.90 1eb9436 (master)
OperatingSystem=Linux
Kernel=5.4.0-42-generic
Architecture=x86_64
Distribution=Ubuntu 20.04.1 LTS
Desktop=UBUNTU:GNOME
Theme=fusion
Language=it_IT.UTF-8
Memory=15941M

[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.6.0
DBus=libdbus-1.so.3.19.11
GStreamer=libgstreamer-1.0.so.0.1602.0
GTK+2=libgtk-x11-2.0.so.0.2400.32
GTK+3=libgtk-3.so.0.2404.16
OpenGL=libGL.so.1.7.0
Poppler=libpoppler.so.97.0.0
QT5=libQt5Core.so.5.12.8
SDL=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_IM_MODULE=ibus
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=ubuntu
DISPLAY=:0
GB_GUI=gb.qt5
GDMSESSION=ubuntu
GIO_LAUNCHED_DESKTOP_FILE=/home/<hostname>/.local/share/applications/gambas3.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=15878
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/<hostname>
IM_CONFIG_PHASE=1
INVOCATION_ID=fa3459e1fcdb48df936518de7b28a70c
JOURNAL_STREAM=9:31363
LANG=it_IT.UTF-8
LANGUAGE=it_IT.UTF-8
LC_ADDRESS=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>
MANAGERPID=1220
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=/home/<hostname>
QT4_IM_MODULE=ibus
QT_ACCESSIBILITY=1
QT_IM_MODULE=ibus
QT_LOGGING_RULES=*.debug=false
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1589,unix/<hostname>:/tmp/.ICE-unix/1589
SHELL=/bin/bash
SHLVL=0
SSH_AGENT_PID=1495
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
USER=<hostname>
USERNAME=<hostname>
WINDOWPATH=2
XAUTHORITY=/run/user/1000/gdm/Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg
XDG_CURRENT_DESKTOP=ubuntu:GNOME
XDG_DATA_DIRS=/usr/share/ubuntu:/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
XDG_SESSION_TYPE=x11
XMODIFIERS=@im=ibus
_=/usr/bin/dbus-update-activation-environment