Some time ago when testing the code that draws the svg themes in Plasma (like applet backgrounds, panels and tooltips) i wrote a very simple plasmoid that its sole purpose was to test that code, its very uninspiring name was SvgPanelTest, because surprise surprise it was a test for the class named SvgPanel:P
It turns out this applet can be actually useful also for theme designers that wants to test the themes they’re doing without killing plasma all the times.
Since now there is a contest to make Plasma even more gorgeous, i’ve decided to publish it in an easily buildable source package, and i hope that it could somewhat help you (yes, YOU :P) to make a beautiful theme that will make vista and osx to look as they are coming straight from the 80’s (well even if it’s a very little help :D)
To build it a KDE4 developing environment is needed (see the techbase article)
at least KDE 4.0.2 is required, but a recent svn snapshot is preferred.
A plasma restart could be needed to see it listed among the plasmoids, or you can also start it with the command
or, with a very recent svn snapshot (from some minutes ago actually :P)
plasmoidviewer svgpaneltest /path/to/your/theme.svg