fastmeter.h

/*
    Copyright (C) 2003 Paul Davis 

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: fastmeter.h,v 1.8 2005/04/18 02:15:18 pauld Exp $
*/

#ifndef __gtkmmext_fastmeter_h__
#define __gtkmmext_fastmeter_h__

#include <gtk--/drawingarea.h>
#include <gtk--/pixmap.h>

namespace Gtkmmext {

class FastMeter : public Gtk::DrawingArea {
  public:
      enum Orientation { 
            Horizontal,
            Vertical
      };
      
      FastMeter (long hold_cnt, unsigned long width, Orientation);
      virtual ~FastMeter ();
      
      void set (float level, float user_level=0.0f);
      void clear ();

      float get_level() { return current_level; }
      float get_user_level() { return current_user_level; }
      float get_peak() { return current_peak; }

      long hold_count() { return hold_cnt; }
      void set_hold_count (long);
      
      static void set_horizontal_xpm (const char **xpm);
      static void set_vertical_xpm (const char **xpm);
      
  protected:
      gint expose_event_impl (GdkEventExpose*);
      void size_request_impl (GtkRequisition*);
      
  private:  
      static GdkPixmap *h_pixmap;
      static GdkBitmap *h_mask;
      static gint h_pixheight;
      static gint h_pixwidth;

      static GdkPixmap *v_pixmap;
      static GdkBitmap *v_mask;
      static gint v_pixheight;
      static gint v_pixwidth;

      Orientation orientation;
      GdkPixmap   *backing;
      GdkRectangle pixrect;
      gint request_width;
      gint request_height;
      unsigned long hold_cnt;
      unsigned long hold_state;
      float current_level;
      float current_peak;
      float current_user_level;
      
      gint vertical_expose (GdkEventExpose*);
      gint horizontal_expose (GdkEventExpose*);
};


} /* namespace */

 #endif /* __gtkmmext_fastmeter_h__ */