dplayconnect.cs

Beginning C# Game Programming 的源代码

//-----------------------------------------------------------------------------
// File: DPlayConnect.cs
//
// Desc: Application class for the DirectPlay samples framework.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
using System;
using System.Collections;
using System.Windows.Forms;
using System.Threading;
using System.Timers;
using Microsoft.DirectX;
using Microsoft.DirectX.DirectPlay;
using System.Runtime.InteropServices;




/// <summary>
/// The connection wizard will allow our users to pick a service provider,
/// and then connect to an existing application, or create a new one as the host.
/// </summary>
public class ConnectWizard
{
    private Peer peerObject;
    private Address deviceAddress;

    private ChooseServiceProviderForm serviceProviderForm;
    private CreateJoinForm createJoinForm;

    private Guid serviceProviderGuid;
    private string username;
    private string samplename;
    private bool isInSession = false;
    private bool isHost = false;
    private int port = 0;

    private Guid applicationGuid;




    /// <summary>
    /// Constructor
    /// </summary>
    /// <param name="peer"></param>
    /// <param name="applicationGuid"></param>
    /// <param name="sampleName"></param>
    public ConnectWizard(Peer peer, Guid application, string sampleName)
    {
        peerObject = peer;
        applicationGuid = application;
        samplename = sampleName;
    }




    /// <summary>
    /// The guid for the current service provider
    /// </summary>
    public Guid ServiceProvider
    {
        get
        { return serviceProviderGuid; }
        set
        { serviceProviderGuid = value; }
    }




    /// <summary>
    /// The game's default port number
    /// </summary>
    public int DefaultPort
    {
        get
        { return port; }
        set
        { port = value; }
    }




    /// <summary>
    /// Am I the host
    /// </summary>
    public bool IsHost
    {
        get
        { return isHost; }
        set
        { isHost = value; }
    }




    /// <summary>
    /// The username
    /// </summary>
    public string Username
    {
        get
        { return username; }
        set
        { username = value; }
    }




    /// <summary>
    /// The sample name
    /// </summary>
    public string SampleName
    {
        get
        { return samplename; }
    }




    /// <summary>
    /// The applications guid
    /// </summary>
    public Guid ApplicationGuid
    {
        get
        { return applicationGuid; }
    }




    /// <summary>
    /// Are we in a session
    /// </summary>
    public bool InSession
    {
        get { return isInSession; }
        set { isInSession = value; }
    }




    /// <summary>
    /// Returns true if the given provider requires a port component
    /// </summary>
    /// <param name="provider">ServiceProvider Guid</param>
    /// <returns></returns>
    static public bool ProviderRequiresPort(Guid provider)
    {
        return (provider != Address.ServiceProviderSerial &&
                provider != Address.ServiceProviderModem &&
                provider != Address.ServiceProviderBlueTooth);
    }




    /// <summary>
    /// Handler for when our form is disposed
    /// </summary>
    public void FormDisposed(object sender, EventArgs e)
    {
        if (sender == createJoinForm)
            createJoinForm = null;

        if (sender == serviceProviderForm)
            serviceProviderForm = null;
    }




    /// <summary>
    /// Set the user information 
    /// </summary>
    public void SetUserInfo()
    {
        //Before we call host, let's actually call SetPeerInformation
        PlayerInformation myinformation = new PlayerInformation();
        myinformation.Name = username;

        peerObject.SetPeerInformation(myinformation, SyncFlags.PeerInformation);
    }




    /// <summary>
    /// Show the service providers form
    /// </summary>
    /// <returns>True if a service provider was picked, false otherwise</returns>
    public bool DoShowServiceProviders()
    {
        if (serviceProviderForm == null)
        {
            username = null;
            serviceProviderForm = new ChooseServiceProviderForm(peerObject,this);
            serviceProviderForm.Disposed += new System.EventHandler(this.FormDisposed);
        }
        if (serviceProviderForm.ShowDialog() == DialogResult.OK)
            return true;

        // The didn't hit ok
        return false;
    }




    /// <summary>
    /// Show the create or join screen
    /// </summary>
    /// <returns>True if we will be in a session, false otherwise</returns>
    public bool DoCreateJoinGame()
    {
        if (deviceAddress != null)
            deviceAddress.Dispose();

        deviceAddress = new Address();

        if (createJoinForm != null)
            createJoinForm.Dispose();

        createJoinForm = new CreateJoinForm(peerObject, deviceAddress, this);
        createJoinForm.Disposed += new System.EventHandler(this.FormDisposed);

        //Set the address's service provider (this will be the device address)
        deviceAddress.ServiceProvider = serviceProviderGuid;
        DialogResult drCreateJoin = createJoinForm.ShowDialog();
        if (drCreateJoin == DialogResult.Cancel)
            return false;

        this.isHost = (drCreateJoin == DialogResult.Yes);
        return true;

    }




    /// <summary>
    /// Start the wizard
    /// </summary>
    /// <returns>True if we are in a session, false otherwise</returns>
    public bool StartWizard()
    {
        isInSession = false;

        while (this.DoShowServiceProviders())
        {
            //Now let's create a game or join a session
            if (this.DoCreateJoinGame())
            {
                // A game has been created or joined now, set our flag
                isInSession = true;
                break;
            }
        }
        return isInSession;
    }
}