GtkFastMeter.h

/*
 * Copyright (C) 2009, 2010 Hermann Meyer, James Warden, Andreas Degert
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * --------------------------------------------------------------------------
 *
 * Class declaration for a level display
 *
 * (Code shamelessly stolen from Ardour by Paul Davis, thanks man!)
 *
 * --------------------------------------------------------------------------
 */

#ifndef __GTK_FAST_METER_H__
#define __GTK_FAST_METER_H__


#include <gdk/gdk.h>
#include <gtk/gtkdrawingarea.h>


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define GTK_TYPE_FAST_METER            (gtk_fast_meter_get_type())
#define GTK_FAST_METER(obj)          (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_FAST_METER, GtkFastMeter))
#define GTK_IS_FAST_METER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_FAST_METER))
#define GTK_FAST_METER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),  GTK_TYPE_FAST_METER, GtkFastMeterClass))
#define GTK_IS_FAST_METER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),  GTK_TYPE_FAST_METER))


      typedef struct _GtkFastMeter       GtkFastMeter;
      typedef struct _GtkFastMeterClass  GtkFastMeterClass;

      struct _GtkFastMeter
      {
            GtkWidget     widget;

            GdkPixbuf*    pixbuf;
            gint          pixheight;
            gint          pixwidth;

            GdkRectangle  pixrect;
            GdkRectangle  last_peak_rect;

            gint          request_width;
            gint          request_height;

            unsigned long hold_cnt;
            unsigned long hold_state;

            float         current_level;
            float         current_peak;
            float         current_user_level;

            static int    min_v_pixbuf_size;
            static int    max_v_pixbuf_size;
            static int    rgb0, rgb1, rgb2, rgb3;

      };

      struct _GtkFastMeterClass
      {
            GtkWidgetClass parent_class;
      };

      GType    gtk_fast_meter_get_type    (void);

      /* --------- public exposed API ---------  */
      GtkWidget* gtk_fast_meter_new       (long,
                                           unsigned long,
                                           int,
                                           int,
                                           int,
                                           int,
                                           int);

      void  gtk_fast_meter_destroy        (GtkObject*      object);

      void  gtk_fast_meter_set            (GtkFastMeter*, float);
      void  gtk_fast_meter_clear          (GtkFastMeter*);

      float gtk_fast_meter_get_level      (GtkFastMeter*);
      float gtk_fast_meter_get_user_level (GtkFastMeter*);
      float gtk_fast_meter_get_peak       (GtkFastMeter*);

      long  gtk_fast_meter_hold_count     (GtkFastMeter*);
      void  gtk_fast_meter_set_hold_count (GtkFastMeter*, long);

#ifdef __cplusplus
}
#endif /* __cplusplus */


#endif /* __GTK_FAST_METER_H__ */