[Qt-interest] Custom Widgets and UI File Organisation

[Kenneth Beck]

Windows XP SP 3, Qt 4.5.0. Visual Studio 2003 with the Qt Visual Studio 
Integration 1.4.3
I have a project that uses a custom plugin derived from QWidget 
(XYPlot0). That part has gone smoothly, I created the plugin using 
procedure outlined in documentation, and i can use it in the designer to 
design forms. XYPlot0 is a simple graphical widget, displays data from 
real-time data acquisition system, but I dont really use it directly, 
only use classes derived from it.
My question is, when I use widgets that are derived from XYPlot0, what 
are the expected entries in the .ui file? The hierarchy is as follows:
QWidget->XYPlot0->BIPSPlot0->BIPSRawVolPlot
When I want to add a BIPSRawVolPlot to a form, should I tell designer 
that it is derived from XYPlot0 or BIPSPlot0? I dont seem to have the 
BIPSPlot0 choice in designer. BIPSPlot0 is kind of an "abstract" class, 
not really used except as being derived from, so should there be an 
entry in the .ui file to mention it? How should that appear in the designer?

Thanks for help