Your idea is good, but we have currently implemented only the generation of really sample widget, so that you can easily get the foundations and then implement your own logic, add the properties you want and use them.
To get your idea done, you can delete the following line, placed on top of the WidgetName in your .cs file:
This will remove the designer from your widget. Then add the properties you want and just go and generate a new Designer for the widget, and you'll be able to use the selectors, if you have Guid properties.
It is important to build
your project once you remove that line from your widget, so the wizard that adds new designer would be able to find it.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items