Linux – How to change wallpaper from command line in KDE 4.3

crondesktop-customizationkdekde-4linux

Basically question is in title, but let's elaborate a bit:

I have KDE 4.3 from Arch Linux. And a script which periodically downloads new wallpaper. So I'd like to set it as current wallpaper from command line (actually from cron job script, but it's not relevant).

In KDE 3, it was trival with dcop. Now, dcop is gone, and I can't find a way to do it with dbus.

Anybody's got idea how to do it?

Best Answer

A trivial solution is to change your wallpaper type in Appearance Settings to slide show, point the directory to the one where your downloaded images can be found, and set an interval thereafter you want a new wallpaper.

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Sadly, there doesn't seem to be a simple way.

It appears you need to do something like this (from https://www.kubuntuforums.net/showthread.php/66762-Right-click-wallpaper-changer?p=387392&viewfull=1#post387392):

qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript 'var allDesktops = desktops();print (allDesktops);for (i=0;i<allDesktops.length;i++) {d = allDesktops[i];d.wallpaperPlugin = "org.kde.image";d.currentConfigGroup = Array("Wallpaper", "org.kde.image", "General");d.writeConfig("Image", "file:///media/sda2/Background/SpaceWall/Escape_Function.jpg")}'

or, another example, formatted more nicely (adapted from https://github.com/bharadwaj-raju/libdesktop/issues/1:

qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript '
    var allDesktops = desktops();
    print (allDesktops);
    for (i=0;i<allDesktops.length;i++) {{
        d = allDesktops[i];
        d.wallpaperPlugin = "org.kde.image";
        d.currentConfigGroup = Array("Wallpaper",
                                     "org.kde.image",
                                     "General");
        d.writeConfig("Image", "file:///path/to/imagefile")
    }}
'

I also found a pythonic solution.

Best Answer

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