xfce4-panel changing icon for showdesktop plugin

[Sylvain]

Hi Charlie,

On 28/11/2015 13:45, Charlie Kravetz wrote:
> You are, of course, welcome. I do not know any place with this
> documentation. I was hoping a developer would jump in and give you
> that information. 

OK. I will wait a bit to see if someone else answer before asking more.

I tested to change Icons of some other panel's plugin without success
yet, on changing there's Icon using:

~/.local/share/applications/*.desktop


For example:
xfce4-places-plugin-1.6.0
xfce4-screenshooter-1.8.1
xfce4-whiskermenu-plugin-1.4.0

I don't know yet how they read their prefs, nor if

xfce4-panel -r

is sufficient to reload the icon if I change something.

Nothing change yet. Even when editing 
/usr/share/xfce4/panel/plugins/*.desktop

Some rc files are stored in ~/.config/xfce4/panel/ … no more clue yet.

Regards,
Sylvain.