/src/wrappers/gtk/library/scroll_child_callback.e

 1indexing
 2	description: "Generic callback for the scroll-child 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 SCROLL_CHILD_CALLBACK
26
27inherit CALLBACK redefine object end
28
29insert G_OBJECT_FACTORY [GTK_SCROLLED_WINDOW]
30
31creation make
32
33feature
34	object: GTK_SCROLLED_WINDOW
35
36feature
37
38	callback (scroll_type, a_bool: INTEGER; instance: POINTER): INTEGER is
39		do
40			object := wrapper(instance)
41			Result := function.item ([scroll_type, a_bool.to_boolean, object]).to_integer
42		end
43
44	callback_pointer: POINTER is
45		do
46			Result := get_callback_pointer ($callback)
47		ensure
48			Result.is_not_null
49		end
50
51	connect (an_object: GTK_WIDGET; a_function: FUNCTION [ANY, TUPLE [INTEGER, BOOLEAN, GTK_SCROLLED_WINDOW], BOOLEAN]) is
52		do
53			debug
54				print ("SCROLL_CHILD_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
55				print (" an_object.handle=") print (an_object.handle.to_string)
56				print (") Current=") print (to_pointer.to_string)
57				print (" Current.handle=") print (handle.to_string)
58				print ("%N")
59			end
60			
61			handler_id := g_signal_connect_closure (an_object.handle,
62																 signal_name.to_external,
63																 handle,
64																 0 -- i.e. call it before default handler
65																)
66			function:=a_function
67		end
68
69	signal_name: STRING is "scroll-child"
70
71	function: FUNCTION [ANY, TUPLE [INTEGER, BOOLEAN, GTK_SCROLLED_WINDOW], BOOLEAN]
72
73end