/src/wrappers/gtk/library/drag_leave_callback.e

 1indexing
 2	description: "Generic callback for the drag-leave signal"
 3	copyright: "[
 4					Copyright (C) 2006 Paolo redaelli, eiffel-libraries team,  GTK+ team and others
 5					
 6					This library is free software; you can redistribute it and/or
 7					modify it under the terms of the GNU Lesser General Public License
 8					as published by the Free Software Foundation; either version 2.1 of
 9					the License, or (at your option) any later version.
10					
11					This library is distributed in the hope that it will be useful, but
12					WITHOUT ANY WARRANTY; without even the implied warranty of
13					MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14					Lesser General Public License for more details.
15
16					You should have received a copy of the GNU Lesser General Public
17					License along with this library; if not, write to the Free Software
18					Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19					02110-1301 USA
20				]"
21	license: "LGPL v2 or later"
22	date: "$Date:$"
23	revision "$Revision:$"
24
25class DRAG_LEAVE_CALLBACK
26
27inherit CALLBACK redefine object end
28
29insert G_OBJECT_FACTORY [GTK_WIDGET]
30
31creation make
32
33feature
34	object: GTK_WIDGET
35
36feature
37	callback (drag_context_ptr: POINTER; time: INTEGER; instance: POINTER) is
38		require
39			time >= 0
40		local
41			-- factory: G_OBJECT_EXPANDED_FACTORY [GDK_DRAG_CONTEXT]
42			drag_context: GDK_DRAG_CONTEXT
43		do
44			debug
45				print ("Callback: instance=") print (instance.to_string) print ("%N")
46			end
47			-- The following is written with the implicit requirement 
48			-- that object actually has an Eiffel wrapper.
49			object := wrapper(instance)
50			create drag_context.secondary_wrapper_from(drag_context_ptr)
51			procedure.call ([drag_context, time, object])
52		ensure
53			time >= 0
54		end
55
56	callback_pointer: POINTER is
57		do
58			Result := get_callback_pointer ($callback)
59		ensure
60			Result.is_not_null
61		end
62
63	connect (an_object: GTK_WIDGET; a_procedure: PROCEDURE [ANY, TUPLE[GDK_DRAG_CONTEXT, INTEGER, GTK_WIDGET]]) is
64		do
65			debug
66				print ("DRAG_LEAVE_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
67				print (" an_object.handle=") print (an_object.handle.to_string)
68				print (") Current=") print (to_pointer.to_string)
69				print (" Current.handle=") print (handle.to_string)
70				print ("%N")
71			end
72			
73			handler_id := g_signal_connect_closure (an_object.handle,
74																 signal_name.to_external,
75																 handle,
76																 0 -- i.e. call it before default handler
77																)
78			procedure:=a_procedure
79		end
80
81		signal_name: STRING is "drag-leave"
82
83	procedure: PROCEDURE [ANY, TUPLE[GDK_DRAG_CONTEXT, INTEGER, GTK_WIDGET]]
84end