/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
* \file bell.h Ring the bell or flash the screen
* Sometimes, X programs "ring the bell", whatever that means. Metacity lets
* the user configure the bell to be audible or visible (aka visual), and
* if it's visual it can be configured to be frame-flash or fullscreen-flash.
* We never get told about audible bells; X handles them just fine by itself.
* The visual bell was the result of a discussion in Bugzilla here:
* Copyright (C) 2002 Sun Microsystems Inc.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
* This program 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
* General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
* Gives the user some kind of visual bell; in fact, this is our response
* to any kind of bell request, but we set it up so that we only get
* notified about visual bells, and X deals with audible ones.
* If the configure script found we had no XKB, this does not exist.
* \param display The display the bell event came in on
* \param xkb_ev The bell event we just received
void meta_bell_notify (MetaDisplay *display, XkbAnyEvent *xkb_ev);
* Turns the bell to audible or visual. This tells X what to do, but
* not Metacity; you will need to set the "visual bell" pref for that.
* If the configure script found we had no XKB, this is a no-op.
* \param display The display we're configuring
* \param audible True for an audible bell, false for a visual bell
void meta_bell_set_audible (MetaDisplay *display, gboolean audible);
* Initialises the bell subsystem. This involves intialising
* XKB (which, despite being a keyboard extension, is the
* place to look for bell notifications), then asking it
* to send us bell notifications, and then also switching
* off the audible bell if we're using a visual one ourselves.
* Unlike most X extensions we use, we only initialise XKB here
* (rather than in main()). It's possible that XKB is not
* installed at all, but if that was known at build time
* we will have HAVE_XKB undefined, which will cause this
* function to be a no-op.
* \param display The display which is opening
* \bug There is a line of code that's never run that tells
* XKB to reset the bell status after we quit. Bill H said
* that XFree86's implementation is broken so we shouldn't
* call it, but that was in 2002. Is it working now?
gboolean meta_bell_init (MetaDisplay *display);
* Shuts down the bell subsystem.
* \param display The display which is closing
* \bug This is never called! If we had XkbSetAutoResetControls
* enabled in meta_bell_init(), this wouldn't be a problem, but
* we don't.
void meta_bell_shutdown (MetaDisplay *display);
* Deals with a frame being destroyed. This is important because if we're
* using a visual bell, we might be flashing the edges of the frame, and
* so we'd have a timeout function waiting ready to un-flash them. If the
* frame's going away, we can tell the timeout not to bother.
* \param frame The frame which is being destroyed
void meta_bell_notify_frame_destroy (MetaFrame *frame);