[Gambas-bugtracker] Bug #2523: QT and GTK Do not Align the same when object will be the same size at the form

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2523&from=L21haW4-

Brian G reported a new bug.

Summary
-------

QT and GTK Do not Align the same when object will be the same size at the form

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


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

When a button is want to be the entire size of the form
then in GTK3 everything works correctly

in QT the button seems to be shifted up and to the right by about
2.8 characters with a empty border on the left and bottom.

Attached APP.

If I set the button  X,Y to one and the button Size to Form.h - 1   and form.w - 1
then both work the same. Is this a bug or a feature?


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

[System]
Gambas=3.17.90
OperatingSystem=Linux
Kernel=5.13.0-30-generic
Architecture=x86_64
Distribution=Linux Mint 20.3 Una
Desktop=MATE
Font=Ubuntu,10
Scale=7
Theme=mint-y
Language=en_US.UTF-8
Memory=13938M

[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]
COMPIZ_CONFIG_PROFILE=mint
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-r2DOvQP4k9,guid=af336381d15c7f0bbccedd676255ec63
DISPLAY=:50
EDITOR=/usr/bin/nano
GB_GUI=gb.gtk3
GIO_LAUNCHED_DESKTOP_FILE_PID=1973800
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_US.UTF-8
LC_ALL=en_US.UTF-8
LD_LIBRARY_PATH=:/usr/local/easysoft/access:/usr/local/easysoft/lib
LIBVIRT_DEFAULT_URI=qemu:///system
LOGNAME=<user>
MATE_DESKTOP_SESSION_ID=this-is-deprecated
MOTD_SHOWN=pam
PATH=<home>/.local/bin:<home>/bin:<home>/.local/bin:<home>/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PULSE_CLIENTCONFIG=<home>/.x2go/C-<user>-50-1649798234_stDMATE_dp24/.pulse-client.conf
PWD=<home>
QT_ACCESSIBILITY=1
QT_FONT_DPI=96
QT_GRAPHICSSYSTEM=native
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=qt5ct
QT_SCALE_FACTOR=1
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1969149,unix/<hostname>:/tmp/.ICE-unix/1969149
SHELL=/usr/bin/gsh
SHLVL=1
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
SSH_CLIENT=73.66.0.38 40482 22
SSH_CONNECTION=73.66.0.38 40482 192.168.250.8 22
STARTUP=/usr/bin/im-launch /usr/bin/env LD_LIBRARY_PATH=:/usr/local/easysoft/access:/usr/local/easysoft/lib mate-session
TERM=xterm
TZ=:/etc/localtime
USER=<user>
X2GO_AGENT_PID=1968819
X2GO_SESSION=<user>-50-1649798234_stDMATE_dp24
XAUTHORITY=<home>/.Xauthority
XDG_CURRENT_DESKTOP=MATE
XDG_DATA_DIRS=<home>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
XDG_RUNTIME_DIR=/run/user/1000
XDG_SESSION_CLASS=user
XDG_SESSION_ID=418
XDG_SESSION_TYPE=tty
XSESSION_EXEC=mate-session