Preview widget

[kde at bartcoppens.be]

Quoting Boudewijn Rempt <boud at valdyas.org>:  
> Bart? I see that you've created a whizzo preview widget -- but do you also   
> have code using it? I'm working on a select-by-color dialog, and I think it   
> would be a good idea to re-use your widget, but I cannot find out how it's   
> used.  
When I made the widget, I used the code in attached diff to test it. The code 
itself is a bit hacky and messy, but should provide a basic example of using 
the widget. 
 
Bart 
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