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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2000-2013, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library 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 along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
with System;
package body Gtk.Object is
-------------
-- Convert --
-------------
function Convert (W : Gtk_Object) return System.Address is
begin
if W = null then
return System.Null_Address;
else
return Get_Object (W);
end if;
end Convert;
-------------
-- Convert --
-------------
function Convert (W : System.Address) return Gtk_Object is
Stub : Gtk_Object_Record;
begin
return Gtk_Object (Get_User_Data (W, Stub));
end Convert;
---------------------------
-- In_Destruction_Is_Set --
---------------------------
function In_Destruction_Is_Set
(Object : access Gtk_Object_Record'Class) return Boolean
is
use type System.Address;
begin
return Get_Object (Object) = System.Null_Address
or else Flag_Is_Set (Object, In_Destruction);
end In_Destruction_Is_Set;
-------------
-- Destroy --
-------------
procedure Destroy (Object : access Gtk_Object_Record) is
procedure Internal (Object : System.Address);
pragma Import (C, Internal, "gtk_object_destroy");
procedure Unref_Internal (Object : System.Address);
pragma Import (C, Unref_Internal, "g_object_unref");
-- External binding: g_object_unref
Ptr : constant System.Address := Get_Object (Object);
use type System.Address;
begin
-- Keep a reference on the object, so that the Ada structure is
-- never automatically deleted when the C object is.
-- We can't reset the content of Object to System.Null_Address before
-- calling the C function, because we want the user's destroy
-- callbacks to be called with the appropriate object.
Ref (Object);
Internal (Ptr);
-- We then can make sure that the object won't be referenced any
-- more, (The Ada structure won't be free before the ref count goes
-- down to 0, and we don't want the user to use a deleted object...).
Set_Object (Object, System.Null_Address);
-- Free the reference we had. In most cases, this results in the
-- object being freed. We can't use directly Unref, since the Ptr
-- field for Object is Null_Address.
Unref_Internal (Ptr);
end Destroy;
-----------
-- Flags --
-----------
function Flags (Object : access Gtk_Object_Record) return Guint32 is
function Internal (Object : System.Address) return Guint32;
pragma Import (C, Internal, "ada_object_flags");
begin
return Internal (Get_Object (Object));
end Flags;
--------------
-- Floating --
--------------
function Floating_Is_Set
(Object : access Gtk_Object_Record'Class) return Boolean is
begin
return Flag_Is_Set (Object, Floating);
end Floating_Is_Set;
--------------
-- Get_Type --
--------------
function Get_Type (Object : access Gtk_Object_Record) return Gtk_Type is
function Internal (Object : System.Address) return Gtk_Type;
pragma Import (C, Internal, "ada_gobject_get_type");
begin
return Internal (Get_Object (Object));
end Get_Type;
---------------
-- Set_Flags --
---------------
procedure Set_Flags (Object : access Gtk_Object_Record; Flags : Guint32) is
procedure Internal (Object : System.Address; Flags : Guint32);
pragma Import (C, Internal, "ada_object_set_flags");
begin
Internal (Get_Object (Object), Flags);
end Set_Flags;
----------
-- Sink --
----------
procedure Sink (Object : access Gtk_Object_Record) is
procedure Internal (Object : System.Address);
pragma Import (C, Internal, "gtk_object_sink");
begin
Internal (Get_Object (Object));
end Sink;
-----------------
-- Unset_Flags --
-----------------
procedure Unset_Flags
(Object : access Gtk_Object_Record; Flags : Guint32)
is
procedure Internal (Object : System.Address; Flags : Guint32);
pragma Import (C, Internal, "ada_object_unset_flags");
begin
Internal (Get_Object (Object), Flags);
end Unset_Flags;
-----------------
-- Flag_Is_Set --
-----------------
function Flag_Is_Set
(Object : access Gtk_Object_Record; Flag : Guint32) return Boolean
is
function Internal (Object : System.Address; Flag : Guint32) return Gint;
pragma Import (C, Internal, "ada_object_flag_is_set");
begin
return Boolean'Val (Internal (Get_Object (Object), Flag));
end Flag_Is_Set;
end Gtk.Object;
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