[Gambas-bugtracker] Bug #2933: TabStrip doesn't display ListView Child under GTK if the Tab was temporarily invisible

[<bugtracker@xxxxxxxxxxxxxx>]

http://gambaswiki.org/bugtracker/edit?object=BUG.2933&from=L21haW4-

Claus DIETRICH reported a new bug.

Summary
-------

TabStrip doesn't display ListView Child under GTK if the Tab was temporarily invisible

Type             : Bug
Priority         : Medium
Gambas version   : 3.19
Product          : GUI components


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

Hi
I am working on an app where a ListView, which is embedded in a TabStrip ist not displayed under GTK. Under QT everything in fine.
To see the problem just start the attached demo app and click on the button "populate". This should fill the listview of Tab3 and show it.
Please see attached screen videos which demonstrate the difference between GTK and QT.

Although it is not visible under GTK the ListView responds to clicks on items.

Apparently this is caused by following sequence:
1. switching the Tab's visibility to False
2. populating the ListView child
3. switching the Tabs's visibility to True

Best regards
Claus


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

[System]
Gambas=3.19.4
OperatingSystem=Linux
Distribution=Linux Mint 20.3 (Una)
Kernel=5.4.0-192-generic
Architecture=x86_64
Cores=8
Memory=15872M
Language=de_DE.UTF-8
Platform=x11
Desktop=CINNAMON
DesktopResolution=96
DesktopScale=7
WidgetTheme=mint-y
Font=Ubuntu,10
[Programs]
appimage-builder=appimage-builder: 1.1.0
dpkg=Debian »dpkg« Paketmanagement-Programm Version 1.19.7 (amd64).
gcc=gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
msgmerge=msgmerge (GNU gettext-tools) 0.19.8.1
rpmbuild=RPM version 4.14.2.1
[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.6.0
DBus=libdbus-1.so.3.19.11
GDK2=libgdk-x11-2.0.so.0.2400.32
GDK3=libgdk-3.so.0.2404.16
GStreamer=libgstreamer-1.0.so.0.1603.0
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
RSvg=librsvg-2.so.2.47.0
SDL=libSDL2-2.0.so.0.10.0
SQLite 3=libsqlite3.so.0.8.6
[Environment]
CINNAMON_VERSION=5.2.7
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=cinnamon
DISPLAY=:0
GB_DESKTOP_PORTAL_ENABLED=0
GB_GUI=gb.gtk3
GDMSESSION=cinnamon
GDM_LANG=de_DE
GIO_LAUNCHED_DESKTOP_FILE=<home>/.local/share/applications/gambas3.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=69668
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
GTK_OVERLAY_SCROLLING=1
HOME=<home>
LANG=de_DE.UTF-8
LANGUAGE=de_DE.UTF-8
LC_ADDRESS=de_DE.UTF-8
LC_ALL=de_DE.UTF-8
LC_IDENTIFICATION=de_DE.UTF-8
LC_MEASUREMENT=de_DE.UTF-8
LC_MONETARY=de_DE.UTF-8
LC_NAME=de_DE.UTF-8
LC_NUMERIC=de_DE.UTF-8
LC_PAPER=de_DE.UTF-8
LC_TELEPHONE=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LOGNAME=<user>
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=<home>
QT_ACCESSIBILITY=1
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1277,unix/<hostname>:/tmp/.ICE-unix/1277
SHELL=/bin/bash
SHLVL=0
SSH_AGENT_PID=1347
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
USER=<user>
XAUTHORITY=<home>/.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>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<user>
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


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