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/src/wrappers/gtk/library/value_changed_callback.e

http://github.com/tybor/Liberty
Specman e | 74 lines | 60 code | 14 blank | 0 comment | 3 complexity | 7c70e83e3d44fdcbbf96aed5f0dcc97d MD5 | raw file
 1indexing
 2	description: "Generic callback for the value-changed 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 VALUE_CHANGED_CALLBACK
26
27inherit CALLBACK redefine object end
28
29insert G_OBJECT_FACTORY [GTK_RANGE]
30
31creation make
32
33feature
34	object: GTK_RANGE
35
36feature
37	callback (instance: POINTER) is
38		do
39			debug
40				print ("Callback: instance=") print (instance.to_string) print ("%N")
41			end
42			object := wrapper(instance)
43			procedure.call ([object])
44		end
45
46	callback_pointer: POINTER is
47		do
48			Result := get_callback_pointer ($callback)
49		ensure
50			Result.is_not_null
51		end
52
53	connect (an_object: GTK_RANGE; a_procedure: PROCEDURE [ANY, TUPLE[GTK_RANGE]]) is
54		do
55			debug
56				print ("VALUE_CHANGED_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
57				print (" an_object.handle=") print (an_object.handle.to_string)
58				print (") Current=") print (to_pointer.to_string)
59				print (" Current.handle=") print (handle.to_string)
60				print ("%N")
61			end
62			
63			handler_id := g_signal_connect_closure (an_object.handle,
64																 signal_name.to_external,
65																 handle,
66																 0 -- i.e. call it before default handler
67																)
68			procedure:=a_procedure
69		end
70
71		signal_name: STRING is "value-changed"
72
73	procedure: PROCEDURE [ANY, TUPLE[GTK_RANGE]]
74end