server_tlb.pas

《Delphi开发人员指南》配书原码

unit Server_TLB;

// ************************************************************************ //
// WARNING                                                                    
// -------                                                                    
// The types declared in this file were generated from data read from a       
// Type Library. If this type library is explicitly or indirectly (via        
// another type library referring to this type library) re-imported, or the   
// 'Refresh' command of the Type Library Editor activated while editing the   
// Type Library, the contents of this file will be regenerated and all        
// manual modifications will be lost.                                         
// ************************************************************************ //

// PASTLWTR : $Revision:   1.79  $
// File generated on 8/15/99 1:03:09 AM from Type Library described below.

// ************************************************************************ //
// Type Lib: C:\work\d5dg\code\Ch23\AutoEvents\Server.tlb (1)
// IID\LCID: {2EA1DDA0-5CBD-11D2-9261-00104B700B61}\0
// Helpfile: 
// DepndLst: 
//   (1) v2.0 stdole, (c:\windows\SYSTEM\StdOle2.Tlb)
//   (2) v4.0 StdVCL, (C:\Program Files\Borland\CBuilder4\Bin\stdvcl40.tlb)
// ************************************************************************ //
interface

uses Windows, ActiveX, Classes, Graphics, OleServer, OleCtrls, StdVCL;

// *********************************************************************//
// GUIDS declared in the TypeLibrary. Following prefixes are used:        
//   Type Libraries     : LIBID_xxxx                                      
//   CoClasses          : CLASS_xxxx                                      
//   DISPInterfaces     : DIID_xxxx                                       
//   Non-DISP interfaces: IID_xxxx                                        
// *********************************************************************//
const
  // TypeLibrary Major and minor versions
  ServerMajorVersion = 1;
  ServerMinorVersion = 0;

  LIBID_Server: TGUID = '{2EA1DDA0-5CBD-11D2-9261-00104B700B61}';

  IID_IServerWithEvents: TGUID = '{2EA1DDA1-5CBD-11D2-9261-00104B700B61}';
  DIID_IServerWithEventsEvents: TGUID = '{2EA1DDA3-5CBD-11D2-9261-00104B700B61}';
  CLASS_ServerWithEvents: TGUID = '{2EA1DDA5-5CBD-11D2-9261-00104B700B61}';
type

// *********************************************************************//
// Forward declaration of types defined in TypeLibrary                    
// *********************************************************************//
  IServerWithEvents = interface;
  IServerWithEventsDisp = dispinterface;
  IServerWithEventsEvents = dispinterface;

// *********************************************************************//
// Declaration of CoClasses defined in Type Library                       
// (NOTE: Here we map each CoClass to its Default Interface)              
// *********************************************************************//
  ServerWithEvents = IServerWithEvents;


// *********************************************************************//
// Interface: IServerWithEvents
// Flags:     (4416) Dual OleAutomation Dispatchable
// GUID:      {2EA1DDA1-5CBD-11D2-9261-00104B700B61}
// *********************************************************************//
  IServerWithEvents = interface(IDispatch)
    ['{2EA1DDA1-5CBD-11D2-9261-00104B700B61}']
    procedure Clear; safecall;
    procedure AddText(const NewText: WideString); safecall;
  end;

// *********************************************************************//
// DispIntf:  IServerWithEventsDisp
// Flags:     (4416) Dual OleAutomation Dispatchable
// GUID:      {2EA1DDA1-5CBD-11D2-9261-00104B700B61}
// *********************************************************************//
  IServerWithEventsDisp = dispinterface
    ['{2EA1DDA1-5CBD-11D2-9261-00104B700B61}']
    procedure Clear; dispid 3;
    procedure AddText(const NewText: WideString); dispid 4;
  end;

// *********************************************************************//
// DispIntf:  IServerWithEventsEvents
// Flags:     (4096) Dispatchable
// GUID:      {2EA1DDA3-5CBD-11D2-9261-00104B700B61}
// *********************************************************************//
  IServerWithEventsEvents = dispinterface
    ['{2EA1DDA3-5CBD-11D2-9261-00104B700B61}']
    procedure OnTextChanged(const NewText: WideString); dispid 1;
    procedure OnClear; dispid 2;
  end;

// *********************************************************************//
// The Class CoServerWithEvents provides a Create and CreateRemote method to          
// create instances of the default interface IServerWithEvents exposed by              
// the CoClass ServerWithEvents. The functions are intended to be used by             
// clients wishing to automate the CoClass objects exposed by the         
// server of this typelibrary.                                            
// *********************************************************************//
  CoServerWithEvents = class
    class function Create: IServerWithEvents;
    class function CreateRemote(const MachineName: string): IServerWithEvents;
  end;

  TServerWithEventsOnTextChanged = procedure(Sender: TObject; var NewText: OleVariant) of object;


// *********************************************************************//
// OLE Server Proxy class declaration
// Server Object    : TServerWithEvents
// Help String      : ServerWithEvents Object
// Default Interface: IServerWithEvents
// Def. Intf. DISP? : No
// Event   Interface: IServerWithEventsEvents
// TypeFlags        : (2) CanCreate
// *********************************************************************//
{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
  TServerWithEventsProperties= class;
{$ENDIF}
  TServerWithEvents = class(TOleServer)
  private
    FOnTextChanged: TServerWithEventsOnTextChanged;
    FOnClear: TNotifyEvent;
    FIntf:        IServerWithEvents;
{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
    FProps:       TServerWithEventsProperties;
    function      GetServerProperties: TServerWithEventsProperties;
{$ENDIF}
    function      GetDefaultInterface: IServerWithEvents;
  protected
    procedure InitServerData; override;
    procedure InvokeEvent(DispID: TDispID; var Params: TVariantArray); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor  Destroy; override;
    procedure Connect; override;
    procedure ConnectTo(svrIntf: IServerWithEvents);
    procedure Disconnect; override;
    procedure Clear;
    procedure AddText(const NewText: WideString);
    property  DefaultInterface: IServerWithEvents read GetDefaultInterface;
  published
{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
    property Server: TServerWithEventsProperties read GetServerProperties;
{$ENDIF}
    property OnTextChanged: TServerWithEventsOnTextChanged read FOnTextChanged write FOnTextChanged;
    property OnClear: TNotifyEvent read FOnClear write FOnClear;
  end;

{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
// *********************************************************************//
// OLE Server Properties Proxy Class
// Server Object    : TServerWithEvents
// (This object is used by the IDE's Property Inspector to allow editing
//  of the properties of this server)
// *********************************************************************//
 TServerWithEventsProperties = class(TPersistent)
  private
    FServer:    TServerWithEvents;
    function    GetDefaultInterface: IServerWithEvents;
    constructor Create(AServer: TServerWithEvents);
  protected
  public
    property DefaultInterface: IServerWithEvents read GetDefaultInterface;
  published
  end;
{$ENDIF}


procedure Register;

implementation

uses ComObj;

class function CoServerWithEvents.Create: IServerWithEvents;
begin
  Result := CreateComObject(CLASS_ServerWithEvents) as IServerWithEvents;
end;

class function CoServerWithEvents.CreateRemote(const MachineName: string): IServerWithEvents;
begin
  Result := CreateRemoteComObject(MachineName, CLASS_ServerWithEvents) as IServerWithEvents;
end;

procedure TServerWithEvents.InitServerData;
const
  CServerData: TServerData = (
    ClassID:   '{2EA1DDA5-5CBD-11D2-9261-00104B700B61}';
    IntfIID:   '{2EA1DDA1-5CBD-11D2-9261-00104B700B61}';
    EventIID:  '{2EA1DDA3-5CBD-11D2-9261-00104B700B61}';
    LicenseKey: nil;
    Version: 500);
begin
  ServerData := @CServerData;
end;

procedure TServerWithEvents.Connect;
var
  punk: IUnknown;
begin
  if FIntf = nil then
  begin
    punk := GetServer;
    ConnectEvents(punk);
    Fintf:= punk as IServerWithEvents;
  end;
end;

procedure TServerWithEvents.ConnectTo(svrIntf: IServerWithEvents);
begin
  Disconnect;
  FIntf := svrIntf;
  ConnectEvents(FIntf);
end;

procedure TServerWithEvents.DisConnect;
begin
  if Fintf <> nil then
  begin
    DisconnectEvents(FIntf);
    FIntf := nil;
  end;
end;

function TServerWithEvents.GetDefaultInterface: IServerWithEvents;
begin
  if FIntf = nil then
    Connect;
  Assert(FIntf <> nil, 'DefaultInterface is NULL. Component is not connected to Server. You must call ''Connect'' or ''ConnectTo'' before this operation');
  Result := FIntf;
end;

constructor TServerWithEvents.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
  FProps := TServerWithEventsProperties.Create(Self);
{$ENDIF}
end;

destructor TServerWithEvents.Destroy;
begin
{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
  FProps.Free;
{$ENDIF}
  inherited Destroy;
end;

{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
function TServerWithEvents.GetServerProperties: TServerWithEventsProperties;
begin
  Result := FProps;
end;
{$ENDIF}

procedure TServerWithEvents.InvokeEvent(DispID: TDispID; var Params: TVariantArray);
begin
  case DispID of
    -1: Exit;  // DISPID_UNKNOWN
   1: if Assigned(FOnTextChanged) then
            FOnTextChanged(Self, Params[0] (*const WideString*));
   2: if Assigned(FOnClear) then
            FOnClear(Self);
  end; {case DispID}
end;

procedure TServerWithEvents.Clear;
begin
  DefaultInterface.Clear;
end;

procedure TServerWithEvents.AddText(const NewText: WideString);
begin
  DefaultInterface.AddText(NewText);
end;

{$IFDEF LIVE_SERVER_AT_DESIGN_TIME}
constructor TServerWithEventsProperties.Create(AServer: TServerWithEvents);
begin
  inherited Create;
  FServer := AServer;
end;

function TServerWithEventsProperties.GetDefaultInterface: IServerWithEvents;
begin
  Result := FServer.DefaultInterface;
end;

{$ENDIF}

procedure Register;
begin
  RegisterComponents('Servers',[TServerWithEvents]);
end;

end.