104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*****************************************************************************
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*
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* Most of this code comes from gAlan 0.2.0, copyright (C) 1999
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* Tony Garnock-Jones, with modifications by Sean Bolton,
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* copyright (C) 2004, and minor modifications by William Weston,
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* copyright (C) 2007.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*****************************************************************************/
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#ifndef __GTK_KNOB_H__
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#define __GTK_KNOB_H__
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#include <gdk/gdk.h>
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#include <gtk/gtkadjustment.h>
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#include <gtk/gtkwidget.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define GTK_KNOB(obj) GTK_CHECK_CAST(obj, gtk_knob_get_type(), GtkKnob)
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#define GTK_KNOB_CLASS(klass) GTK_CHECK_CLASS_CAST(klass, gtk_knob_get_type(), GtkKnobClass)
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#define GTK_IS_KNOB(obj) GTK_CHECK_TYPE(obj, gtk_knob_get_type())
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typedef struct _GtkKnob GtkKnob;
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typedef struct _GtkKnobClass GtkKnobClass;
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typedef struct _GtkKnobAnim GtkKnobAnim;
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/* better to make this an object and let widgets ref/deref it perhaps */
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struct _GtkKnobAnim {
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GdkPixbuf *pixbuf;
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gint width; /* derived from image width */
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gint height; /* derived from image height. */
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gint frame_width; /* derived from pixbuf (width / height) or provided override for rectangular frames */
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};
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struct _GtkKnob {
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GtkWidget widget;
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/* update policy (GTK_UPDATE_[CONTINUOUS/DELAYED/DISCONTINUOUS]) */
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guint policy : 2;
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/* State of widget (to do with user interaction) */
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guint8 state;
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gint saved_x, saved_y;
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/* ID of update timer, or 0 if none */
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guint32 timer;
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/* knob animation */
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GtkKnobAnim *anim;
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gint width, height;
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GdkBitmap *mask;
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GdkGC *mask_gc;
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GdkGC *red_gc;
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/* Old values from adjustment stored so we know when something changes */
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gfloat old_value;
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gfloat old_lower;
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gfloat old_upper;
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/* The adjustment object that stores the data for this knob */
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GtkAdjustment *adjustment;
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};
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struct _GtkKnobClass {
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GtkWidgetClass parent_class;
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};
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extern GtkWidget *gtk_knob_new(GtkAdjustment *adjustment, GtkKnobAnim *anim);
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extern guint gtk_knob_get_type(void);
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extern GtkAdjustment *gtk_knob_get_adjustment(GtkKnob *knob);
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extern void gtk_knob_set_update_policy(GtkKnob *knob, GtkUpdateType policy);
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extern void gtk_knob_set_adjustment(GtkKnob *knob, GtkAdjustment *adjustment);
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GtkKnobAnim *gtk_knob_animation_new_from_inline(const guint8 *pixbuf);
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GtkKnobAnim *gtk_knob_animation_new_from_file_full(gchar *filename,
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gint frame_width,
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gint width,
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gint height);
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GtkKnobAnim *gtk_knob_animation_new_from_file(gchar *filename);
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void gtk_knob_set_animation (GtkKnob *knob, GtkKnobAnim *anim);
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#ifdef __cplusplus
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}
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#endif
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#endif
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