/src/wrappers/gtk/library/expose_event_callback.e
http://github.com/tybor/Liberty · Specman e · 72 lines · 56 code · 15 blank · 1 comment · 3 complexity · 56acd06678f6e80ebb4a43ffa6201001 MD5 · raw file
- indexing
- description: "Callback for the expose-event signal."
- copyright: "[
- Copyright (C) 2007 eiffel-libraries team, GTK+ team and others
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License
- as published by the Free Software Foundation; either version 2.1 of
- the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA
- ]"
- license: "LGPL v2 or later"
- date: "$Date:$"
- revision "$Revision:$"
- class EXPOSE_EVENT_CALLBACK
- inherit CALLBACK redefine object end
- insert G_OBJECT_FACTORY [GTK_WIDGET]
- creation
- make
- feature
- object: GTK_WIDGET
- feature
- callback (event_expose_ptr: POINTER; instance: POINTER): INTEGER is
- local
- expose_event: GDK_EVENT_EXPOSE
- do
- check eiffel_created_the_widget: has_eiffel_wrapper_stored (instance) end
- object := wrapper(instance)
- create expose_event.from_external_pointer (event_expose_ptr)
- Result := function.item ([expose_event, object]).to_integer
- -- GTK is about to release this event, detach it from Eiffel
- expose_event.dispose
- end
- callback_pointer: POINTER is
- do
- Result := get_callback_pointer ($callback)
- ensure
- Result.is_not_null
- end
- connect (an_object: GTK_WIDGET; a_function: FUNCTION [ANY, TUPLE [GDK_EVENT_EXPOSE, GTK_WIDGET], BOOLEAN]) is
- do
- handler_id := g_signal_connect_closure (an_object.handle,
- signal_name.to_external,
- handle,
- 0 -- i.e. call it before default handler
- )
- function := a_function
- end
- function: FUNCTION [ANY, TUPLE [GDK_EVENT_EXPOSE, GTK_WIDGET], BOOLEAN]
- signal_name: STRING is "expose-event"
- end -- class EXPOSE_EVENT_CALLBACK