[Gambas-bugtracker] Bug #1912: Hide / show window border not setting form dimentions right (GTK only)

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.1912&from=L21haW4-

Bruce STEERS reported a new bug.

Summary
-------

Hide / show window border not setting form dimentions right (GTK only)

Type             : Bug
Priority         : Low
Gambas version   : Master
Product          : GUI components


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

Another GTK glitch here Benoit.

Attached is a simple temperature monitor app i made that just reads a raspberry pi style temp file or can use a command like sensors.

I made a routine to move the window by clicking it anywhere using the mousedrag event.

It seemed to work okay but i just found a problem that's only happening on GTK not QT.

if window border is hidden drag-move works fine.
If i show the border drag-move works fine.
if i then hide the border again it goes wrong. (but only on gtk)
it's like the border is hidden but the form still thinks it's the size it was with the border showing or something?

the attached app has been set up to run without configuring and use a dummy temperature file in the source dir for you.

You'll see what i mean if you load it, drag-move it, show border, move it, hide border and try to move it again.

(right click window for menu and go to Look/Feel to find the border hide/show option.)

Thank you.
Bruce


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

[System]
Gambas=3.15.90 4dea9a2 (master)
OperatingSystem=Linux
Kernel=5.4.0-45-generic
Architecture=x86_64
Distribution=Linux Mint 20 Ulyana
Desktop=MATE
Theme=qt5ctproxy
Language=en_GB.UTF-8
Memory=7952M

[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.0.1602.0
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_BACKEND=x11
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DEFAULTS_PATH=/usr/share/gconf/mate.default.path
DESKTOP_SESSION=mate
DISPLAY=:0
GB_GUI=gb.qt5
GDMSESSION=mate
GDM_LANG=en_GB
GIO_LAUNCHED_DESKTOP_FILE_PID=130777
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK_MODULES=gail:atk-bridge
GTK_OVERLAY_SCROLLING=0
HOME=<home>
LANG=en_GB.UTF-8
LANGUAGE=en_GB.UTF-8
LC_ALL=en_GB.UTF-8
LOGNAME=<user>
MANDATORY_PATH=/usr/share/gconf/mate.mandatory.path
MATE_DESKTOP_SESSION_ID=this-is-deprecated
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_AUTO_SCREEN_SCALE_FACTOR=0
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
QT_SCALE_FACTOR=1
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/914,unix/<hostname>:/tmp/.ICE-unix/914
SHELL=/bin/bash
SHLVL=0
SSH_AGENT_PID=1060
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-mate:/etc/xdg
XDG_CURRENT_DESKTOP=MATE
XDG_DATA_DIRS=/usr/share/mate:<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=mate
XDG_SESSION_ID=c1
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7