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/src/wrappers/gtk/library/begin_user_action_callback.e

http://github.com/tybor/Liberty
Specman e | 78 lines | 60 code | 14 blank | 4 comment | 3 complexity | f7681e0adeb0adde1c190e3dab905c93 MD5 | raw file
 1indexing
 2	description: "Generic callback for the begin-user-action 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 BEGIN_USER_ACTION_CALLBACK
26
27inherit CALLBACK redefine object end
28
29insert G_OBJECT_FACTORY [GTK_TEXT_BUFFER]
30
31creation make
32
33feature
34	object: GTK_TEXT_BUFFER
35
36feature
37	callback (instance: POINTER) is
38		do
39			debug
40				print ("Callback: instance=") print (instance.to_string) print ("%N")
41			end
42			-- The following is written with the implicit requirement 
43			-- that object actually has an Eiffel wrapper
44			object := wrapper(instance)
45			-- The above line replaces "create object.from_external_pointer
46			-- (instance)" which continuosly creates new Eiffel wrappers
47			procedure.call ([object])
48		end
49
50	callback_pointer: POINTER is
51		do
52			Result := get_callback_pointer ($callback)
53		ensure
54			Result.is_not_null
55		end
56
57	connect (an_object: GTK_TEXT_BUFFER; a_procedure: PROCEDURE [ANY, TUPLE[GTK_TEXT_BUFFER]]) is
58		do
59			debug
60				print ("BEGIN_USER_ACTION_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
61				print (" an_object.handle=") print (an_object.handle.to_string)
62				print (") Current=") print (to_pointer.to_string)
63				print (" Current.handle=") print (handle.to_string)
64				print ("%N")
65			end
66					 
67			handler_id := g_signal_connect_closure (an_object.handle,
68																 signal_name.to_external,
69																 handle,
70																 0 -- i.e. call it before default handler
71																 )
72			procedure:=a_procedure
73		end
74
75	signal_name: STRING is "begin-user-action"
76
77	procedure: PROCEDURE [ANY, TUPLE[GTK_TEXT_BUFFER]]
78end