/src/wrappers/gtk/library/edited_callback.e

 1indexing
 2	description: "Generic callback for the edited signal"
 3	copyright: "[
 4					Copyright (C) 2006 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 EDITED_CALLBACK
26
27inherit CALLBACK redefine object end
28
29insert G_OBJECT_FACTORY [GTK_CELL_RENDERER_TEXT]
30
31creation make
32
33feature
34	object: GTK_CELL_RENDERER_TEXT
35
36feature
37	callback (arg1, arg2, instance: POINTER) is
38		local
39			str1, str2: STRING
40		do
41			debug
42				print ("Callback: instance=") print (instance.to_string) print ("%N")
43			end
44			-- The following is written with the implicit requirement 
45			-- that object actually has an Eiffel wrapper.
46			object := wrapper(instance)
47			
48			if arg1.is_not_null then
49				-- FIXME: are we leaving a mem leak by doing a copy? :-/
50				create str1.from_external_copy (arg1)
51			end
52			if arg2.is_not_null then
53				-- FIXME: are we leaving a mem leak by doing a copy? :-/
54				create str2.from_external_copy (arg2)
55			end
56			procedure.call ([str1, str2, object])
57		end
58
59	callback_pointer: POINTER is
60		do
61			Result := get_callback_pointer ($callback)
62		ensure
63			Result.is_not_null
64		end
65
66	connect (an_object: GTK_CELL_RENDERER_TEXT; a_procedure: PROCEDURE [ANY, TUPLE[STRING, STRING, GTK_CELL_RENDERER_TEXT]]) is
67		do
68			debug
69				print ("EDITED_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
70				print (" an_object.handle=") print (an_object.handle.to_string)
71				print (") Current=") print (to_pointer.to_string)
72				print (" Current.handle=") print (handle.to_string)
73				print ("%N")
74			end
75			
76			handler_id := g_signal_connect_closure (an_object.handle,
77																 signal_name.to_external,
78																 handle,
79																 0 -- i.e. call it before default handler
80																)
81			procedure:=a_procedure
82		end
83
84	signal_name: STRING is "edited"
85
86	procedure: PROCEDURE [ANY, TUPLE[STRING, STRING, GTK_CELL_RENDERER_TEXT]]
87
88end