My custom Connector is not use why ?

Dear All I'm new in vaadin I try to create a custom component extend DateField, why my connector is not taken.
What is the common error or mistake.
See attachement.

Thanks for all your help

Regards

Thanks Marko for helping yes I give more details bellow
My server-side yes extend DateField

public class SDateField extends DateField

Client side widget extend VPopupCalendar

public class SDateFieldWidget extends VPopupCalendar

My Connector extend PopupDateFieldConnector and is connected to my widget

public class SDateFieldConnector extends PopupDateFieldConnector
Maybe I don't well understand what you say "Compile the client-side classes in a widget set"
I have created a xml file SDateFieldWidgetset.gwt.xml and put at the same level of my widget class

Maybe my problem come from the structure of the projet ? I put a print screen in attachment.

Thanks again.

Best regards

 

Marko Grönroos: A bit more details about how you have implemented the component would be useful.

Usually when extending an existing component, you need at least:

• A server-side class extending com.vaadin.ui.DateField
• A client-side widget that possibly extends com.vaadin.client.ui.VDateField
• A client-side connector that possibly extends com.vaadin.client.ui.datefield.DateFieldConnector, and refers to the server-side class with the @Connect annotation
• Compile the client-side classes in a widget set