LightDM - Apr 2019 - Onboard Virtual Keyboard resize at LightDM login Display

Hi, I'm using a Debian Testing based Distro with LightDM as Display Manager
and XFCE as the Desktop. I have installed and configured OnBoard to start and
run at the login display automatically by editing the
/etc/lightdm/lightdm-gtk-greeter.conf file and adding the following line:

"keyboard = onboard --theme=DarkRoom --layout=Compact --keep-aspect
--size=1000x600"

The theme and layout settings work fine, but the size never changes, the key for
moving and resizing are missing. I can't do any dragging to resize the
keyboard.

On my system I can work the keyboard, but if you are using a tablet with a
different resolution, the OnBoard keyboard might be too small, and the keys
difficult to use if you happen to have large fingers.

I have also looked at /etc/onboard/onboard-defaults.conf file, but any changes I
do there don't seem to do make any difference when in LightDM.

Once logged in to the XFCE Desktop, there is no problem resizing the OnBoard
Keyboard. There it works via terminal commands and by dragging it's corners.
It is just within LightDM where nothing happens.

Does anyone have a solution for this?

Thanks for your help,
rindi1

> The theme and layout settings work fine, but the size never changes,
> the key for moving and resizing are missing. I can't do any dragging
> to resize the keyboard.
This is because these functions are handled by the window manager.  You
will need to load a window manager (such as XFCE) in order to have
these functions available.  LightDM is not a window manager.
> Does anyone have a solution for this?
Since window managers are very complex, it is unlikely LightDM will
ever support this.  Probably your best solution is to write a script
that retrieves the current screen resolution and then loads the
keyboard so that it is sized correctly for the screen size.

Otherwise the keyboard app itself will need to implement sizing and
moving, so that these functions can be used without a window manager
loaded.

Cheers,
Adam.