using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 using System.Threading.Tasks;

 using System.ServiceModel;

 using System.Collections;

 using System.Drawing;

 using System.Runtime.Serialization;

 namespace SharpDisplayInterface

 {

     [DataContract]

     public class TextField

     {

         public TextField()

         {

             Index = 0;

             Text = "";

             Alignment = ContentAlignment.MiddleLeft;

         }

         public TextField(int aIndex, string aText = "", ContentAlignment aAlignment = ContentAlignment.MiddleLeft)

         {

             Index = aIndex;

             Text = aText;

             Alignment = aAlignment;

         }

         [DataMember]

         public int Index { get; set; }

         [DataMember]

         public string Text { get; set; }

         [DataMember]

         public ContentAlignment Alignment { get; set; }

     }

     [ServiceContract(   CallbackContract = typeof(IDisplayServiceCallback),

                         SessionMode = SessionMode.Required)]

     public interface IDisplayService

     {

         /// <summary>

         /// Set the name of this client.

         /// Name is a convenient way to recognize your client.

         /// Naming you client is not mandatory.

         /// In the absence of a name the session ID is often used instead.

         /// </summary>

         /// <param name="aClientName"></param>

         [OperationContract(IsOneWay = true)]

         void SetName(string aClientName);

         /// <summary>

         /// Put the given text in the given field on your display.

         /// Fields are often just lines of text.

         /// </summary>

         /// <param name="aTextFieldIndex"></param>

         [OperationContract(IsOneWay = true)]

         void SetText(TextField aTextField);

         /// <summary>

         /// Allows a client to set multiple text fields at once.

         /// </summary>

         /// <param name="aTexts"></param>

         [OperationContract(IsOneWay = true)]

         void SetTexts(System.Collections.Generic.IList<TextField> aTextFields);

         /// <summary>

         /// Provides the number of clients currently connected

         /// </summary>

         /// <returns></returns>

         [OperationContract()]

         int ClientCount();

     }

     public interface IDisplayServiceCallback

     {

         [OperationContract(IsOneWay = true)]

         void OnConnected();

         /// <summary>

         /// Tell our client to close its connection.

         /// Notably sent when the server is shutting down.

         /// </summary>

         [OperationContract(IsOneWay = true)]

         void OnCloseOrder();

     }

 }