File : gnatcom-events.adb
------------------------------------------------------------------------------
-- --
-- GNATCOM - Ada 95 COM/DCOM/COM+ Development Framework and Tools --
-- --
-- G N A T C O M . E V E N T S --
-- --
-- B o d y --
-- --
-- $Revision: 1.3 $
-- --
-- Copyright (C) 1999, 2000, 2001 David Botton --
-- --
-- This is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. It is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or --
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with this; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- More information about GNATCOM and the most current public version can --
-- be located on the web at http://www.adapower.com/gnatcom --
-- --
-- Support for GNATCOM is available from Ada Core Technologies, Inc. --
-- --
-- In the U.S., contact Ada Core Technologies at: --
-- Tel: +1 (212) 620 7300 ext 117 --
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-- Email: sales@gnat.com --
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-- Email: sales@act-europe.fr --
------------------------------------------------------------------------------
with Ada.Unchecked_Conversion;
with GNATCOM.Errors;
with GNATCOM.Interface;
package body GNATCOM.Events is
procedure Error_Check (Result : in GNATCOM.Types.HRESULT);
------------
-- Advise --
------------
procedure Advise
(This : in out IConnectionPoint_Type;
Event_Interface :
access GNATCOM.Create.COM_Interface.COM_Interface_Type)
is
begin
Advise (This, Event_Interface.all'Address);
end Advise;
------------
-- Advise --
------------
procedure Advise
(This : in out IConnectionPoint_Type;
Event_Interface : in System.Address)
is
Sink : GNATCOM.Interface.Interface_Type;
begin
GNATCOM.Interface.Attach (Sink, Event_Interface);
GNATCOM.Interface.AddRef (Sink);
Error_Check
(Pointer (This).Vtbl.Advise (Pointer (This),
GNATCOM.Interface.Pointer (Sink),
This.Cookie'Unchecked_Access));
end Advise;
-------------------------
-- FindConnectionPoint --
-------------------------
function FindConnectionPoint
(This : IConnectionPointContainer_Type;
Event_IID : GNATCOM.Types.GUID)
return GNATCOM.Types.Pointer_To_IConnectionPoint
is
Connection : aliased GNATCOM.Types.Pointer_To_IConnectionPoint;
New_GUID : aliased GNATCOM.Types.GUID := Event_IID;
begin
Error_Check
(Pointer (This).Vtbl.FindConnectionPoint
(Pointer (This),
New_GUID'Unchecked_Access,
Connection'Unchecked_Access));
return Connection;
end FindConnectionPoint;
----------------
-- Initialize --
----------------
procedure Initialize (This : in out IConnectionPointContainer_Type) is
begin
Set_IID (This, GNATCOM.Types.IID_IConnectionPointContainer);
end Initialize;
----------------
-- Initialize --
----------------
procedure Initialize (This : in out IConnectionPoint_Type) is
begin
Set_IID (This, GNATCOM.Types.IID_IConnectionPoint);
end Initialize;
-------------
-- Pointer --
-------------
function Pointer
(This : in IConnectionPoint_Type)
return GNATCOM.Types.Pointer_To_IConnectionPoint
is
begin
return To_Pointer_To_IConnectionPoint (Address (This));
end Pointer;
-------------
-- Pointer --
-------------
function Pointer
(This : in IConnectionPointContainer_Type)
return GNATCOM.Types.Pointer_To_IConnectionPointContainer
is
begin
return To_Pointer_To_IConnectionPointContainer (Address (This));
end Pointer;
----------------
-- Set_Events --
----------------
procedure Set_Events
(This : in out IConnectionPoint_Type;
For_Object : in GNATCOM.Interface.Interface_Type'Class;
Event_IID : in GNATCOM.Types.GUID;
Event_Interface :
access GNATCOM.Create.COM_Interface.COM_Interface_Type;
Free : Boolean := True)
is
Container : IConnectionPointContainer_Type;
begin
Query (Container, For_Object);
Attach (This, FindConnectionPoint
(Container,
Event_IID => Set_Events.Event_IID).all'Address);
Advise (This, Event_Interface);
if Free then
GNATCOM.Create.COM_Interface.Release (Event_Interface);
end if;
end Set_Events;
----------------
-- Set_Events --
----------------
procedure Set_Events
(This : in out IConnectionPoint_Type;
For_Object : in GNATCOM.Interface.Interface_Type'Class;
Event_IID : in GNATCOM.Types.GUID;
Event_Interface : in System.Address)
is
Container : IConnectionPointContainer_Type;
begin
Query (Container, For_Object);
Attach (This, FindConnectionPoint
(Container,
Event_IID => Set_Events.Event_IID).all'Address);
Advise (This, Event_Interface);
end Set_Events;
--------------
-- Unadvise --
--------------
procedure Unadvise (This : in out IConnectionPoint_Type) is
begin
Error_Check
(Pointer (This).Vtbl.Unadvise (Pointer (This),
This.Cookie));
end Unadvise;
-----------------
-- Error_Check --
-----------------
procedure Error_Check (Result : in GNATCOM.Types.HRESULT) is
begin
if GNATCOM.Errors.FAILED (Result) then
case Result is
when CONNECT_E_ADVISELIMIT =>
raise ADVISE_LIMIT_ERROR;
when CONNECT_E_CANNOTCONNECT =>
raise INCORRECT_INTERFACE_ERROR;
when CONNECT_E_NOCONNETION =>
raise NO_PREVIOUS_ADVISE_ERROR;
when others =>
GNATCOM.Errors.Error_Check (Result);
end case;
end if;
end Error_Check;
end GNATCOM.Events;