"has a relation" to work with designer ?

[jpn]

I think you'll need to implement a QDesignerPropertySheetExtension to give the property sheet a chance to represent custom class of yours.

[thejester]

you mean for the CTest class ?

[jpn]

No, I mean that you should provide a property sheet extension for the EQtDataView-plugin. Qt Designer is unable to handle EQtDataView's property which is of custom type, namely CTest. You will have to tell Qt Designer how to handle such property via property sheet extension.