gxAudioFilterVisitor.h

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00001 /*  Copyright (C) 2004  Guido Simone
00002  *
00003  *  This program is free software; you can redistribute it and/or modify
00004  *  it under the terms of the GNU General Public License as published by
00005  *  the Free Software Foundation; either version 2 of the License, or
00006  *  (at your option) any later version.
00007  *
00008  *  This program is distributed in the hope that it will be useful,
00009  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00010  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011  *  GNU General Public License for more details.
00012 
00013  *  You should have received a copy of the GNU General Public License
00014  *  along with this program; if not, write to the Free Software
00015  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00016  */
00017 
00018 #ifndef GXLIB_GXAUDIOFILTERVISITOR_H
00019 #define GXLIB_GXAUDIOFILTERVISITOR_H
00020 
00021 #include "../gx.h"
00022 
00023 class gxAudioFilter;
00024 class gxAudioPin;
00025 
00026 class gxAudioFilterVisitor
00027 {
00028 public:
00029    gxAudioFilterVisitor() { };
00030    virtual ~gxAudioFilterVisitor() { };
00031 
00032    virtual bool visit( gxAudioFilter * filter ) = 0;
00033 
00034    // optional method to implement if you want to visit each pin
00035    virtual bool visitPin( gxAudioFilter * filter, gxAudioPin * pin )  { return true; }
00036 
00037 private:
00038    gxAudioFilterVisitor( const gxAudioFilterVisitor & rhs);
00039    gxAudioFilterVisitor & operator=( const gxAudioFilterVisitor & rhs);
00040 };
00041 #endif

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