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/****************************************************************************
** $Id$
**
** Definition of TQSimpleInputContext class
**
** Copyright (C) 2004 immodule for TQt Project.  All rights reserved.
**
** This file is written to contribute to Trolltech AS under their own
** licence. You may use this file under your TQt license. Following
** description is copied from their original file headers. Contact
** immodule-qt@freedesktop.org if any conditions of this licensing are
** not clear to you.
**
**
** This file is part of the input method module of the TQt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.TQPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid TQt Enterprise Edition or TQt Professional Edition
** licenses may use this file in accordance with the TQt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about TQt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for TQPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef TQSIMPLEINPUT_CONTEXT_H
#define TQSIMPLEINPUT_CONTEXT_H

#include <tqinputcontext.h>
#include <tqnamespace.h>

#define TQT_KEYSEQUENCE_MAX_LEN 6
#define UNITIZE(qkey) (0x02000000|qkey)

struct TQComposeTableElement {
    uint keys[TQT_KEYSEQUENCE_MAX_LEN];
    uint value;
};

struct TQComposeTable {
    const TQComposeTableElement *data;
    uint size;
};


class TQSimpleInputContext : public TQInputContext {
    TQ_OBJECT
public:
    TQSimpleInputContext();
    ~TQSimpleInputContext();

    virtual TQString identifierName();
    virtual TQString language();

    virtual bool filterEvent( const TQEvent *event );
    virtual void reset();
    virtual void setFocus();
    virtual void unsetFocus();
    virtual void setMicroFocus( int x, int y, int w, int h, TQFont *f = 0 );
    virtual void mouseHandler( int x, TQEvent::Type type,
			       TQt::ButtonState button, TQt::ButtonState state );

protected:
    bool isIgnoreKeys(int keyval );
    bool isComposingKeys( int keyval );
    bool checkComposeTable( uint composeBuffer[], const TQComposeTable *composeTable );
    void commitChar( uint c );

    void clearComposeBuffer(void);

protected:
    uint composeBuffer[TQT_KEYSEQUENCE_MAX_LEN + 1];
    static const TQComposeTable defaultComposeTable;
};

#endif // TQSIMPLEINPUT_CONTEXT_H