Much in the way we did with xfce here is the way to implement de auto change feature in KDE.

This is an easy one. Although you can perform background auto change from KDE control center, it may be usefull to have a script to do the task. You can use this script to create a link in your desktop to change the background image when you want.

The KDE applications can be controlled by scripts via the DCOP mechanism. From the Wikipedia:

DCOP, which stands for Desktop COmmunication Protocol, is a light-weight interprocess and software componentry communication system. The main point of this system is to allow applications to interoperate, and to share complex tasks. Essentially, DCOP is a ‘remote control’ system, which allows an application or a script to enlist the help of other applications. It is built on top of the X Window System’s Inter-Client Exchange protocol.

Let’s begin with the script, here is the code:

#!/bin/bash
dcop kdesktop KBackgroundIface changeWallpaper

Now, you have to create a list of backgrounds using KDE’s control center. First open kcontrol, browse to Appearance & Themes > Background and select Slide Show. Click on Settings

Just create the list, and the script is ready to go.