Vaadin project components doesn't appear in Vaadin Designer

Hello ,
I use Vaadin with Maven on Eclipse . The problem is that i can’t see the Vaadin Project Components(Custom Components, Add ons Components(StackPanel for Example)) in the palette of Vaadin Designer .
A Second Problem is that i can’t see the Components that i ve added in the Java File after a jetty:run.Only components added with the Vaadin Designer are Visible(After the use of Vaadin Designer my Java code is also initialized)

Thank you in advance

I’m not sure about your first problem. The custom components should appear on the bottom part of the palette. There is a small refresh button on the top right corner of the palette. Try to press that.

About your second problem. Do you have any sample code you could share?