/src/wrappers/gtk/library/drag_data_get_callback.e

 1indexing
 2	description: "Generic callback for the drag-data-get 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_DATA_GET_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, selection_data_ptr: POINTER; info, time: INTEGER; instance: POINTER) is
38		require
39			info >= 0
40			time >= 0
41		local
42			drag_context_factory: G_OBJECT_EXPANDED_FACTORY [GDK_DRAG_CONTEXT]
43			drag_context: GDK_DRAG_CONTEXT
44			selection_data: GTK_SELECTION_DATA
45		do
46			debug
47				print ("Callback: instance=") print (instance.to_string) print ("%N")
48			end
49			object := wrapper(instance)
50			
51			drag_context := drag_context_factory.existant_wrapper(drag_context_ptr)
52			if drag_context=Void then
53				create drag_context.from_external_pointer(drag_context_ptr)
54			end
55			
56			create selection_data.from_external_pointer (selection_data_ptr)
57						
58			procedure.call ([drag_context, selection_data, info, time, object])
59		ensure
60			info >= 0
61			time >= 0
62		end
63
64	callback_pointer: POINTER is
65		do
66			Result := get_callback_pointer ($callback)
67		ensure
68			Result.is_not_null
69		end
70
71	connect (an_object: GTK_WIDGET; a_procedure: PROCEDURE [ANY, TUPLE [GDK_DRAG_CONTEXT, GTK_SELECTION_DATA,
72																							  INTEGER_32, INTEGER_32, GTK_WIDGET]]) is
73		do
74			debug
75				print ("DRAG_DATA_GET_CALLBACK.connect (an_object=") print (an_object.to_pointer.to_string)
76				print (" an_object.handle=") print (an_object.handle.to_string)
77				print (") Current=") print (to_pointer.to_string)
78				print (" Current.handle=") print (handle.to_string)
79				print ("%N")
80			end
81			
82			handler_id := g_signal_connect_closure (an_object.handle,
83																 signal_name.to_external,
84																 handle,
85																 0 -- i.e. call it before default handler
86																)
87			procedure:=a_procedure
88		end
89
90		signal_name: STRING is "drag-data-get"
91
92	procedure: PROCEDURE [ANY, TUPLE [GDK_DRAG_CONTEXT, GTK_SELECTION_DATA, INTEGER_32, INTEGER_32, GTK_WIDGET]]
93
94end