src/calf/ctl_vumeter.h

   1 /* Calf DSP Library
   2  * Volume meter widget
   3  *
   4  * Copyright (C) 2008-2010 Krzysztof Foltman, Torben Hohn, Markus
   5  * Schmidt and others
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General
  18  * Public License along with this program; if not, write to the
  19  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22 #ifndef CALF_VUMETER_H
  23 #define CALF_VUMETER_H
  24
  25 #include <gtk/gtk.h>
  26 #include <calf/giface.h>
  27
  28 G_BEGIN_DECLS
  29
  30 #define CALF_TYPE_VUMETER           (calf_vumeter_get_type())
  31 #define CALF_VUMETER(obj)           (G_TYPE_CHECK_INSTANCE_CAST ((obj), CALF_TYPE_VUMETER, CalfVUMeter))
  32 #define CALF_IS_VUMETER(obj)        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CALF_TYPE_VUMETER))
  33 #define CALF_VUMETER_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST ((klass),  CALF_TYPE_VUMETER, CalfVUMeterClass))
  34 #define CALF_IS_VUMETER_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE ((klass),  CALF_TYPE_VUMETER))
  35 #define CALF_VUMETER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),  CALF_TYPE_VUMETER, CalfVUMeterClass))
  36
  37 enum CalfVUMeterMode
  38 {
  39     VU_STANDARD,
  40     VU_MONOCHROME,
  41     VU_MONOCHROME_REVERSE,
  42     VU_STANDARD_CENTER,
  43     VU_MONOCHROME_CENTER
  44 };
  45
  46 struct CalfVUMeter
  47 {
  48     GtkDrawingArea parent;
  49     CalfVUMeterMode mode;
  50     float value;
  51     float vumeter_hold;
  52     bool holding;
  53     long last_hold;
  54     float last_value;
  55     float vumeter_falloff;
  56     bool falling;
  57     float last_falloff;
  58     long last_falltime;
  59     int meter_width;
  60     int vumeter_width;
  61     int vumeter_height;
  62     float disp_value;
  63     int vumeter_position;
  64     cairo_surface_t *cache_surface;
  65     cairo_pattern_t *pat;
  66 };
  67
  68 struct CalfVUMeterClass
  69 {
  70     GtkDrawingAreaClass parent_class;
  71 };
  72
  73 extern GtkWidget *calf_vumeter_new();
  74 extern GType calf_vumeter_get_type();
  75 extern void calf_vumeter_set_value(CalfVUMeter *meter, float value);
  76 extern float calf_vumeter_get_value(CalfVUMeter *meter);
  77 extern void calf_vumeter_set_mode(CalfVUMeter *meter, CalfVUMeterMode mode);
  78 extern CalfVUMeterMode calf_vumeter_get_mode(CalfVUMeter *meter);
  79 extern void calf_vumeter_set_hold(CalfVUMeter *meter, float value);
  80 extern float calf_vumeter_get_hold(CalfVUMeter *meter);
  81 extern void calf_vumeter_set_falloff(CalfVUMeter *meter, float value);
  82 extern float calf_vumeter_get_falloff(CalfVUMeter *meter);
  83 extern void calf_vumeter_set_width(CalfVUMeter *meter, int value);
  84 extern int calf_vumeter_get_width(CalfVUMeter *meter);
  85 extern void calf_vumeter_set_height(CalfVUMeter *meter, int value);
  86 extern int calf_vumeter_get_height(CalfVUMeter *meter);
  87 extern void calf_vumeter_set_position(CalfVUMeter *meter, int value);
  88 extern int calf_vumeter_get_position(CalfVUMeter *meter);
  89
  90 G_END_DECLS
  91
  92 #endif