src/calf/ctl_knob.h

   1 /* Calf DSP Library
   2  * A knob (dial) 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
  23 #ifndef CALF_CTL_KNOB_H
  24 #define CALF_CTL_KNOB_H
  25
  26 #include <gtk/gtk.h>
  27
  28 G_BEGIN_DECLS
  29
  30 #define CALF_TYPE_KNOB          (calf_knob_get_type())
  31 #define CALF_KNOB(obj)          (G_TYPE_CHECK_INSTANCE_CAST ((obj), CALF_TYPE_KNOB, CalfKnob))
  32 #define CALF_IS_KNOB(obj)       (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CALF_TYPE_KNOB))
  33 #define CALF_KNOB_CLASS(klass)  (G_TYPE_CHECK_CLASS_CAST ((klass),  CALF_TYPE_KNOB, CalfKnobClass))
  34 #define CALF_IS_KNOB_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass),  CALF_TYPE_KNOB))
  35
  36 struct CalfKnob
  37 {
  38     GtkRange parent;
  39     int knob_type;
  40     int knob_size;
  41     double start_x, start_y, last_y, start_value, default_value;
  42 };
  43
  44 struct CalfKnobClass
  45 {
  46     GtkRangeClass parent_class;
  47     GdkPixbuf *knob_image[5];
  48 };
  49
  50 extern GtkWidget *calf_knob_new();
  51 extern GtkWidget *calf_knob_new_with_adjustment(GtkAdjustment *_adjustment);
  52
  53 extern GType calf_knob_get_type();
  54
  55 G_END_DECLS
  56
  57 #endif