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/*
This file is part of the Opie Project
=. Copyright (C) 2004 Rajko 'Alwin' Albrecht <alwin@handhelds.org>
.=l. Copyright (C) The Opie Team <opie-devel@handhelds.org>
.>+-=
_;:, .> :=|. This program is free software; you can
.> <`_, > . <= redistribute it and/or modify it under
:`=1 )Y*s>-.-- : the terms of the GNU Library General Public
.="- .-=="i, .._ License as published by the Free Software
- . .-<_> .<> Foundation; either version 2 of the License,
._= =} : or (at your option) any later version.
.%`+i> _;_.
.i_,=:_. -<s. 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
..}^=.= = ; Library General Public License for more
++= -. .` .: details.
: = ...= . :.=-
-. .:....=;==+<; You should have received a copy of the GNU
-_. . . )=. = Library General Public License along with
-- :-=` this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/* QT */
#include <qwindowsystem_qws.h>
#include <qvaluelist.h>
namespace Opie {
namespace Core {
class ODevice;
/**
* A singleton which will manage all possible keyboard filters inside opie.
* It makes sure that key handlers of odevice are checked first than the
* keyfilters of software.
* @short a keyfilter proxy
* @see QWSServer::KeyboardFilter
* @author Rajko Albrecht
* @version 1.0
*/
class OKeyFilter
{
friend class Opie::Core::ODevice;
protected:
/**
* Protected constructor - generate class via inst()
* @see inst()
*/
OKeyFilter();
/**
* Protected constructor - generate class via inst()
* @see inst()
*/
OKeyFilter(const OKeyFilter&){};
/**
* Append filter to the primary list.
* This is only allowed for friend classes from odevice
* @param aFilter a filter to append
* @see addHandler
*/
virtual void addPreHandler(QWSServer::KeyboardFilter *aFilter)=0;
/**
* Remove the specified filter from list and give back ownership.
* This is only allowed for friend classes from odevice
* @param aFilter a filter to remove
* @see remHandler
*/
virtual void remPreHandler(QWSServer::KeyboardFilter *aFilter)=0;
public:
virtual ~OKeyFilter();
/**
* Append filter to the secondary list.
* @param aFilter a filter to append
* @see addPreHandler
*/
virtual void addHandler(QWSServer::KeyboardFilter *aFilter)=0;
/**
* Remove the specified filter from list and give back ownership.
* @param aFilter a filter to remove
* @see remPreHandler
*/
virtual void remHandler(QWSServer::KeyboardFilter *aFilter)=0;
/**
* Returns a handler to an instance of OKeyFilter
* @return a pointer to a working OKeyFilter
*/
static OKeyFilter*inst();
};
}
}
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