chatmain.pas

一个聊天窗口

unit Chatmain;

interface

uses
  Classes, QControls, QStdCtrls, QExtCtrls, QButtons, QForms, Sockets,
  QComCtrls, QGrids, QDBGrids;


type
  TForm1 = class(TForm)
    Panel1: TPanel;
    memSend: TMemo;
    Panel3: TPanel;
    Label1: TLabel;
    edtRemoteHost: TEdit;
    Label2: TLabel;
    edtRemotePort: TEdit;
    Label3: TLabel;
    edtLocalPort: TEdit;
    btnActivateServer: TButton;
    TcpClient1: TTcpClient;
    TcpServer1: TTcpServer;
    btnSend: TButton;
    Panel2: TPanel;
    memRecv: TMemo;
    Button1: TButton;
    StatusBar1: TStatusBar;
    Label4: TLabel;
    Edit1: TEdit;
    Button2: TButton;
    DBGrid1: TDBGrid;
    Button3: TButton;
    Button4: TButton;
    ComboBox1: TComboBox;
    Label5: TLabel;
    procedure btnSendClick(Sender: TObject);
    procedure TcpServer1Accept(sender: TObject;
      ClientSocket: TCustomIpClient);
    procedure btnActivateServerClick(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure memRecvChange(Sender: TObject);
    procedure memSendChange(Sender: TObject);
    procedure ComboBox1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TClientDataThread = class(TThread)
  private
  public
    ListBuffer :TStringList;
    TargetList :TStrings;
    procedure synchAddDataToControl;
    constructor Create(CreateSuspended: Boolean);
    procedure Execute; override;
    procedure Terminate;
  end;

var
  Form1: TForm1;

implementation

{$R *.xfm}

constructor TClientDataThread.Create(CreateSuspended: Boolean);
begin
  inherited Create(CreateSuspended);
  FreeOnTerminate := true;
  ListBuffer := TStringList.Create;
end;

procedure TClientDataThread.Terminate;
begin
  ListBuffer.Free;
  inherited;
end;

procedure TClientDataThread.Execute;
begin
  Synchronize(synchAddDataToControl);
end;

procedure TClientDataThread.synchAddDataToControl;
begin
 TargetList.AddStrings(ListBuffer);
end;

procedure TForm1.btnActivateServerClick(Sender: TObject);
begin
  TcpServer1.LocalPort := edtLocalPort.Text;
  TcpServer1.Active := True;
end;         

procedure TForm1.btnSendClick(Sender: TObject);
var
  I: Integer;
begin
  TcpClient1.RemoteHost := edtRemoteHost.Text;
  TcpClient1.RemotePort := edtRemotePort.Text;
  try
    if TcpClient1.Connect then
      for I := 0 to memSend.Lines.Count - 1 do
      TcpClient1.Sendln(memSend.Lines[I]);
      //memSend.Lines.Clear;
  finally
    TcpClient1.Disconnect;
  end;
end;

procedure TForm1.TcpServer1Accept(sender: TObject;
  ClientSocket: TCustomIpClient);
var
  s: string;
  DataThread: TClientDataThread;
begin
  DataThread:= TClientDataThread.Create(true);
  DataThread.TargetList := memRecv.lines;
  DataThread.ListBuffer.Add('*** Connection Accepted ***');
  DataThread.ListBuffer.Add('Remote Host: ' + ClientSocket.LookupHostName(ClientSocket.RemoteHost) +
   ' (' + ClientSocket.RemoteHost + ')');
  DataThread.ListBuffer.Add('===== Begin message =====');
  s := ClientSocket.Receiveln;
  while s <> '' do
  begin
    DataThread.ListBuffer.Add(s);
    s := ClientSocket.Receiveln;
  end;
  DataThread.ListBuffer.Add('===== End of message =====');
  DataThread.ListBuffer.Add('');
  DataThread.Resume;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  memRecv.lines.Clear;
end;

procedure TForm1.memRecvChange(Sender: TObject);
begin
  button4.Enabled:=length(memRecv.Text)>0;
end;

procedure TForm1.memSendChange(Sender: TObject);
begin
  btnSend.Enabled:=length(memSend.Text)>0;
end;

procedure TForm1.ComboBox1Click(Sender: TObject);
begin
  memSend.Lines.Add(ComboBox1.Text);
end;

end.