src/gtk/knob.h

   1 /* nekobee DSSI software synthesizer GUI
   2  *
   3  * Most of this code comes from gAlan 0.2.0, copyright (C) 1999
   4  * Tony Garnock-Jones, with modifications by Sean Bolton,
   5  * copyright (c) 2004.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be
  13  * useful, but WITHOUT ANY WARRANTY; without even the implied
  14  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15  * PURPOSE.  See the GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public
  18  * License along with this program; if not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307, USA.
  21  */
  22
  23 #ifndef __GTK_KNOB_H__
  24 #define __GTK_KNOB_H__
  25
  26 #include <gdk/gdk.h>
  27 #include <gtk/gtkadjustment.h>
  28 #include <gtk/gtkwidget.h>
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #define GTK_KNOB(obj)           GTK_CHECK_CAST(obj, gtk_knob_get_type(), GtkKnob)
  35 #define GTK_KNOB_CLASS(klass)   GTK_CHECK_CLASS_CAST(klass, gtk_knob_get_type(), GtkKnobClass)
  36 #define GTK_IS_KNOB(obj)        GTK_CHECK_TYPE(obj, gtk_knob_get_type())
  37
  38 typedef struct _GtkKnob        GtkKnob;
  39 typedef struct _GtkKnobClass   GtkKnobClass;
  40
  41 struct _GtkKnob {
  42   GtkWidget widget;
  43
  44   /* update policy (GTK_UPDATE_[CONTINUOUS/DELAYED/DISCONTINUOUS]) */
  45   guint policy : 2;
  46
  47   /* State of widget (to do with user interaction) */
  48   guint8 state;
  49   gint saved_x, saved_y;
  50
  51   /* ID of update timer, or 0 if none */
  52   guint32 timer;
  53
  54   /* Pixmap for knob */
  55   GdkPixbuf *pixbuf;
  56
  57   gint knobtype;
  58
  59   /* Old values from adjustment stored so we know when something changes */
  60   gfloat old_value;
  61   gfloat old_lower;
  62   gfloat old_upper;
  63
  64   /* The adjustment object that stores the data for this knob */
  65   GtkAdjustment *adjustment;
  66 };
  67
  68 struct _GtkKnobClass
  69 {
  70   GtkWidgetClass parent_class;
  71 };
  72
  73 extern GtkWidget *gtk_knob_new(GtkAdjustment *adjustment);
  74 extern guint gtk_knob_get_type(void);
  75
  76 extern GtkAdjustment *gtk_knob_get_adjustment(GtkKnob *knob);
  77 extern void gtk_knob_set_update_policy(GtkKnob *knob, GtkUpdateType  policy);
  78
  79 extern void gtk_knob_set_adjustment(GtkKnob *knob, GtkAdjustment *adjustment);
  80
  81 #ifdef __cplusplus
  82 }
  83 #endif
  84
  85 #endif