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ddgevent.h

This is the verbatim text of the ddgevent.h include file.

/*
    Copyright (C) 1997, 1998, 1999, 2000 by Alex Pfaffe
        (Digital Dawn Graphics Inc)
  
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.
  
    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _ddgEvent_Class_
#define _ddgEvent_Class_

#include "util/ddgutil.h"

class WEXP ddgEventHandler
{
public:
        typedef bool (*MouseHandlerFn)(void*, int button, int state, int x, int y);
        typedef bool (*MouseMotionHandlerFn)(void*, int x, int y);    
        typedef bool (*SpecialKeyHandlerFn)(void*, int key, int x, int y);
        typedef bool (*KeyHandlerFn)(void*, unsigned char key, int x, int y);
private:
        MouseHandlerFn                  _mhfn;
        MouseMotionHandlerFn    _mmhfn;
        SpecialKeyHandlerFn             _skhfn;
        KeyHandlerFn                    _khfn;
        ddgEventHandler*                _defaultHandler;
        void*                   _hobj;
public:
        ddgEventHandler(void);
        void mouseHandler( MouseHandlerFn h ) { _mhfn = h; }
        MouseHandlerFn mouseHandler( void ) { return _mhfn; }
        void mouseMotionHandler( MouseMotionHandlerFn h ) { _mmhfn = h; }
        void keyHandler( KeyHandlerFn h ) { _khfn = h; }
        void specialKeyHandler( SpecialKeyHandlerFn h ) { _skhfn = h; }
        MouseMotionHandlerFn mouseMotionHandler( void ) { return _mmhfn; }
        KeyHandlerFn keyHandler( void ) { return _khfn; }
        SpecialKeyHandlerFn specialKeyHandler( void ) { return _skhfn; }
        void handlerObject( void *obj ) { _hobj = obj; }
        void* handlerObject( void ) { return _hobj; }
        void defaultHandler( ddgEventHandler *handler ) { _defaultHandler = handler; }
        ddgEventHandler* defaultHandler( void ) { return _defaultHandler; }
        void set( 
                                                                                   void *obj,
                                                                                   KeyHandlerFn skey,
                                                                                   SpecialKeyHandlerFn sspecialKey,
                                                                                   MouseHandlerFn smouse,
                                                                                   MouseMotionHandlerFn smouseMotion
                                                                                   );
        void overrideEventHandler( ddgEventHandler *handler );
        static bool smouse(void *obj, int button, int state, int x, int y);

        static bool smouseMotion(void *obj, int x, int y);

        static bool sspecialKey(void *obj, int k, int x, int y);

        static bool skey(void *obj, unsigned char k, int x, int y);
};

#endif

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