[Gambas-bugtracker] Bug #2816: Scroll area strange scrolling behaviour

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.2816&from=L21haW4-

Fabien BODARD reported a new bug.

Summary
-------

Scroll area strange scrolling behaviour

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


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

First from the combobox but now in all the scrollarea widget dependent sphere, I see the curious way that scrolling area have to manage a mousewheel step.


I does systematically a <DesktopScale X 60> pixels step. From where come from the 60 value ?. If I have a display of 100 px Height it move of more than 400px  for me (Scale = 7) so 4 time a page up ???


  If Not Me.Enabled Or If Me.Design Then Return
  If Not $bUseMouse Then Return
  
  D = Desktop.Scale * 60
  If Mouse.Orientation = Mouse.Horizontal Or If $H <= $hDrawingArea.H Then
    Scroll($iScrollX - Mouse.Delta * D, $iScrollY)
  Else
    Scroll($iScrollX, $iScrollY - Mouse.Delta * D)
  Endif


Does it not be more logical to move of the ClientHeight or width ? Like a page up ?... Maybe I miss something ...


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

[System]
Gambas=3.18.90 638ad8d (master)
OperatingSystem=Linux
Distribution=Linux Mint 21.1 Vera
Kernel=5.15.0-86-generic
Architecture=x86_64
Cores=4
Memory=7819M
Language=fr_FR.UTF-8
Desktop=CINNAMON
DesktopResolution=96
DesktopScale=7
WidgetTheme=mint-y
Font=Ubuntu,10

[Programs]
appimage-builder=appimage-builder: 1.1.0
dpkg=Programme « dpkg » de gestion de paquets Debian version 1.21.1 (amd64).
gcc=gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
git=git version 2.34.1
msgmerge=msgmerge (GNU gettext-tools) 0.21
rpmbuild=RPM version 4.17.0

[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.7.0
DBus=libdbus-1.so.3.19.13
GDK2=libgdk-x11-2.0.so.0.2400.33
GDK3=libgdk-3.so.0.2404.29
GStreamer=libgstreamer-1.0.so.0.2003.0
GTK+2=libgtk-x11-2.0.so.0.2400.33
GTK+3=libgtk-3.so.0.2404.29
OpenGL=libGL.so.1.7.0
Poppler=libpoppler.so.118.0.0
QT5=libQt5Core.so.5.15.3
RSvg=librsvg-2.so.2.48.0
SDL=libSDL2-2.0.so.0.18.2
SQLite 3=libsqlite3.so.0.8.6

[Environment]
APPMENU_DISPLAY_BOTH=1
CINNAMON_VERSION=5.6.8
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=cinnamon
DISPLAY=:0
EDITOR=editor
GB_GUI=gb.gtk3
GDMSESSION=cinnamon
GDM_LANG=fr_FR
GIO_LAUNCHED_DESKTOP_FILE=<home>/.local/share/applications/gambas3.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=3132
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=fr_FR.UTF-8
LANGUAGE=fr_FR.UTF-8
LC_ALL=fr_FR.UTF-8
LOGNAME=<user>
PATH=<home>/.cargo/bin:/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/1520,unix/<hostname>:/tmp/.ICE-unix/1520
SHELL=/bin/bash
SHLVL=0
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