add GtkKnob from phasex-0.11.1
This commit is contained in:
Tomasz Moń
861
gtkknob.c
Normal file
861
gtkknob.c
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@@ -0,0 +1,861 @@
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/*****************************************************************************
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*
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* gtkknob.c
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*
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* PHASEX: [P]hase [H]armonic [A]dvanced [S]ynthesis [EX]periment
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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 from Sean Bolton,
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* copyright (C) 2004, William Weston copyright (C) 2007, and
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* Pete Shorthose 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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#include <math.h>
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#include <stdio.h>
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#include <gtk/gtkmain.h>
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#include <gtk/gtksignal.h>
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#include "gtkknob.h"
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#ifndef M_PI
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# define M_PI 3.14159265358979323846 /* pi */
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#endif
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#ifndef M_1_PI
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# define M_1_PI 0.31830988618379067154 /* 1/pi */
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#endif
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#define SCROLL_DELAY_LENGTH 250
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#define KNOB_SIZE 32 /* this should really be read from the knob image */
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#define STATE_IDLE 0
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#define STATE_PRESSED 1
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#define STATE_DRAGGING 2
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static void gtk_knob_class_init(GtkKnobClass *klass);
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static void gtk_knob_init(GtkKnob *knob);
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static void gtk_knob_destroy(GtkObject *object);
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static void gtk_knob_realize(GtkWidget *widget);
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static void gtk_knob_size_request(GtkWidget *widget, GtkRequisition *requisition);
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static void gtk_knob_size_allocate(GtkWidget *widget, GtkAllocation *allocation);
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static gint gtk_knob_expose(GtkWidget *widget, GdkEventExpose *event);
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static gint gtk_knob_scroll(GtkWidget *widget, GdkEventScroll *event);
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static gint gtk_knob_button_press(GtkWidget *widget, GdkEventButton *event);
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static gint gtk_knob_button_release(GtkWidget *widget, GdkEventButton *event);
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static gint gtk_knob_motion_notify(GtkWidget *widget, GdkEventMotion *event);
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static gint gtk_knob_timer(GtkKnob *knob);
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static void gtk_knob_update_mouse_update(GtkKnob *knob);
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static void gtk_knob_update_mouse(GtkKnob *knob, gint x, gint y, gboolean absolute);
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static void gtk_knob_update(GtkKnob *knob);
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static void gtk_knob_adjustment_changed(GtkAdjustment *adjustment, gpointer data);
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static void gtk_knob_adjustment_value_changed(GtkAdjustment *adjustment, gpointer data);
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GError *gerror;
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/* Local data */
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static GtkWidgetClass *parent_class = NULL;
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/*****************************************************************************
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*
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* gtk_knob_get_type()
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*
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*****************************************************************************/
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guint
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gtk_knob_get_type(void) {
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static guint knob_type = 0;
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if (!knob_type) {
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GtkTypeInfo knob_info = {
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"GtkKnob",
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sizeof (GtkKnob),
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sizeof (GtkKnobClass),
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(GtkClassInitFunc) gtk_knob_class_init,
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(GtkObjectInitFunc) gtk_knob_init,
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NULL,
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NULL,
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};
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knob_type = gtk_type_unique (gtk_widget_get_type (), &knob_info);
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}
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return knob_type;
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}
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/*****************************************************************************
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*
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* gtk_knob_class_init()
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*
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*****************************************************************************/
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static void
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gtk_knob_class_init (GtkKnobClass *class) {
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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object_class = (GtkObjectClass*) class;
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widget_class = (GtkWidgetClass*) class;
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parent_class = gtk_type_class (gtk_widget_get_type ());
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object_class->destroy = gtk_knob_destroy;
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widget_class->realize = gtk_knob_realize;
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widget_class->expose_event = gtk_knob_expose;
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widget_class->size_request = gtk_knob_size_request;
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widget_class->size_allocate = gtk_knob_size_allocate;
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widget_class->scroll_event = gtk_knob_scroll;
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widget_class->button_press_event = gtk_knob_button_press;
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widget_class->button_release_event = gtk_knob_button_release;
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widget_class->motion_notify_event = gtk_knob_motion_notify;
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}
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/*****************************************************************************
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*
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* gtk_knob_init()
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*
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*****************************************************************************/
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static void
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gtk_knob_init (GtkKnob *knob) {
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knob->policy = GTK_UPDATE_CONTINUOUS;
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knob->state = STATE_IDLE;
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knob->saved_x = 0;
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knob->saved_y = 0;
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knob->timer = 0;
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knob->anim = NULL;
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knob->mask = NULL;
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knob->mask_gc = NULL;
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knob->red_gc = NULL;
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knob->old_value = 0.0;
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knob->old_lower = 0.0;
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knob->old_upper = 0.0;
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knob->adjustment = NULL;
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}
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/*****************************************************************************
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*
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* gtk_knob_new()
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*
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*****************************************************************************/
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GtkWidget *
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gtk_knob_new(GtkAdjustment *adjustment, GtkKnobAnim *anim) {
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GtkKnob *knob;
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g_return_val_if_fail (anim != NULL, NULL);
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g_return_val_if_fail (GDK_IS_PIXBUF (anim->pixbuf), NULL);
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knob = gtk_type_new (gtk_knob_get_type ());
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gtk_knob_set_animation (knob, anim);
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if (!adjustment) {
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adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0,
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0.0, 0.0, 0.0);
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}
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gtk_knob_set_adjustment (knob, adjustment);
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return GTK_WIDGET (knob);
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}
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/*****************************************************************************
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*
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* gtk_knob_destroy()
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*
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*****************************************************************************/
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static void
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gtk_knob_destroy(GtkObject *object) {
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GtkKnob *knob;
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g_return_if_fail (object != NULL);
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g_return_if_fail (GTK_IS_KNOB (object));
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knob = GTK_KNOB (object);
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if (knob->adjustment) {
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gtk_object_unref (GTK_OBJECT (knob->adjustment));
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knob->adjustment = NULL;
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}
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/* FIXME: needs ref counting for automatic GtkKnobAnim cleanup
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if (knob->anim) {
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gtk_knob_anim_unref (knob->anim);
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knob->anim = NULL;
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}
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*/
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if (knob->mask) {
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gdk_bitmap_unref (knob->mask);
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knob->mask = NULL;
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}
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if (knob->mask_gc) {
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gdk_gc_unref (knob->mask_gc);
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knob->mask_gc = NULL;
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}
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if (knob->red_gc) {
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gdk_gc_unref (knob->red_gc);
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knob->red_gc = NULL;
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}
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if (GTK_OBJECT_CLASS (parent_class)->destroy) {
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(*GTK_OBJECT_CLASS (parent_class)->destroy) (object);
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}
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}
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/*****************************************************************************
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*
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* gtk_knob_get_adjustment()
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*
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*****************************************************************************/
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GtkAdjustment*
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gtk_knob_get_adjustment(GtkKnob *knob) {
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g_return_val_if_fail (knob != NULL, NULL);
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g_return_val_if_fail (GTK_IS_KNOB (knob), NULL);
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return knob->adjustment;
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}
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/*****************************************************************************
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*
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* gtk_knob_set_update_policy()
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*
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*****************************************************************************/
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void
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gtk_knob_set_update_policy(GtkKnob *knob, GtkUpdateType policy) {
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g_return_if_fail (knob != NULL);
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g_return_if_fail (GTK_IS_KNOB (knob));
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knob->policy = policy;
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}
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/*****************************************************************************
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*
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* gtk_knob_set_adjustment()
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*
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*****************************************************************************/
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void
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gtk_knob_set_adjustment(GtkKnob *knob, GtkAdjustment *adjustment) {
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g_return_if_fail (knob != NULL);
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g_return_if_fail (GTK_IS_KNOB (knob));
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if (knob->adjustment) {
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gtk_signal_disconnect_by_data (GTK_OBJECT (knob->adjustment),
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(gpointer)knob);
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gtk_object_unref (GTK_OBJECT (knob->adjustment));
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}
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knob->adjustment = adjustment;
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gtk_object_ref (GTK_OBJECT (knob->adjustment));
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gtk_object_sink (GTK_OBJECT (knob->adjustment));
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gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
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GTK_SIGNAL_FUNC (gtk_knob_adjustment_changed),
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(gpointer)knob);
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gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
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GTK_SIGNAL_FUNC (gtk_knob_adjustment_value_changed),
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(gpointer)knob);
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knob->old_value = adjustment->value;
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knob->old_lower = adjustment->lower;
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knob->old_upper = adjustment->upper;
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gtk_knob_update (knob);
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}
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/*****************************************************************************
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*
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* gtk_knob_realize()
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*
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*****************************************************************************/
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static void
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gtk_knob_realize(GtkWidget *widget) {
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GtkKnob *knob;
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GdkWindowAttr attributes;
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gint attributes_mask;
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GdkColor color = { 0, 0xffff, 0, 0 };
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_KNOB (widget));
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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knob = GTK_KNOB (widget);
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attributes.x = widget->allocation.x;
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attributes.y = widget->allocation.y;
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attributes.width = widget->allocation.width;
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attributes.height = widget->allocation.height;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.event_mask =
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gtk_widget_get_events (widget) |
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GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK |
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GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK |
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GDK_POINTER_MOTION_HINT_MASK;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.colormap = gtk_widget_get_colormap (widget);
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
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widget->window = gdk_window_new (widget->parent->window,
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&attributes, attributes_mask);
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widget->style = gtk_style_attach (widget->style, widget->window);
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gdk_window_set_user_data (widget->window, widget);
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gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
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knob->mask_gc = gdk_gc_new (widget->window);
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gdk_gc_copy (knob->mask_gc, widget->style->bg_gc[GTK_STATE_NORMAL]);
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gdk_gc_set_clip_mask (knob->mask_gc, knob->mask);
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knob->red_gc = gdk_gc_new (widget->window);
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gdk_gc_copy (knob->red_gc, widget->style->bg_gc[GTK_STATE_NORMAL]);
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gdk_colormap_alloc_color (attributes.colormap, &color, FALSE, TRUE);
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gdk_gc_set_foreground (knob->red_gc, &color);
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}
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/*****************************************************************************
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*
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* gtk_knob_size_request()
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*
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*****************************************************************************/
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static void
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gtk_knob_size_request (GtkWidget *widget, GtkRequisition *requisition) {
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_KNOB (widget));
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requisition->width = GTK_KNOB (widget)->width;
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requisition->height = GTK_KNOB (widget)->height;
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}
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/*****************************************************************************
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*
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* gtk_knob_size_allocate()
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*
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*****************************************************************************/
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static void
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gtk_knob_size_allocate (GtkWidget *widget, GtkAllocation *allocation) {
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GtkKnob *knob;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_KNOB (widget));
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g_return_if_fail (allocation != NULL);
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widget->allocation = *allocation;
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knob = GTK_KNOB (widget);
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if (GTK_WIDGET_REALIZED (widget)) {
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gdk_window_move_resize (widget->window,
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allocation->x, allocation->y,
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allocation->width, allocation->height);
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}
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}
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/*****************************************************************************
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*
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* gtk_knob_expose()
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*
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*****************************************************************************/
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static gint
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gtk_knob_expose(GtkWidget *widget, GdkEventExpose *event) {
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GtkKnob *knob;
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gfloat dx, dy;
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gint frames;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_KNOB (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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if (event->count > 0)
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return FALSE;
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knob = GTK_KNOB (widget);
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frames = ((knob->anim->width / knob->anim->frame_width) - 1);
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dx = knob->adjustment->value - knob->adjustment->lower; /* value, from 0 */
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dy = knob->adjustment->upper - knob->adjustment->lower; /* range */
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dx = (int)(frames * dx / dy) * knob->width; /* check this for height != width */
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gdk_draw_pixbuf (widget->window, knob->mask_gc, knob->anim->pixbuf,
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dx, 0, 0, 0, knob->width, knob->height,
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GDK_RGB_DITHER_NONE, 0, 0);
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return FALSE;
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}
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/*****************************************************************************
|
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*
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* gtk_knob_scroll()
|
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*
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*****************************************************************************/
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static gint
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gtk_knob_scroll(GtkWidget *widget, GdkEventScroll *event) {
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GtkKnob *knob;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_KNOB (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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knob = GTK_KNOB (widget);
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switch (event->direction) {
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case GDK_SCROLL_UP:
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knob->adjustment->value += knob->adjustment->step_increment;
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gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
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"value_changed");
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break;
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case GDK_SCROLL_DOWN:
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knob->adjustment->value -= knob->adjustment->step_increment;
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gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
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"value_changed");
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break;
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default:
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break;
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}
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return FALSE;
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}
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||||
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/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_button_press()
|
||||
*
|
||||
*****************************************************************************/
|
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static gint
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gtk_knob_button_press(GtkWidget *widget, GdkEventButton *event) {
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GtkKnob *knob;
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||||
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g_return_val_if_fail (widget != NULL, FALSE);
|
||||
g_return_val_if_fail (GTK_IS_KNOB (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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||||
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knob = GTK_KNOB (widget);
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||||
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||||
switch (knob->state) {
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||||
case STATE_IDLE:
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||||
switch (event->button) {
|
||||
case 1:
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||||
case 3:
|
||||
gtk_grab_add (widget);
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||||
knob->state = STATE_PRESSED;
|
||||
knob->saved_x = event->x;
|
||||
knob->saved_y = event->y;
|
||||
break;
|
||||
case 2:
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||||
knob->adjustment->value = floor ((knob->adjustment->lower +
|
||||
knob->adjustment->upper + 1.0)
|
||||
* 0.5);
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_button_release()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static gint
|
||||
gtk_knob_button_release(GtkWidget *widget, GdkEventButton *event) {
|
||||
GtkKnob *knob;
|
||||
|
||||
g_return_val_if_fail (widget != NULL, FALSE);
|
||||
g_return_val_if_fail (GTK_IS_KNOB (widget), FALSE);
|
||||
g_return_val_if_fail (event != NULL, FALSE);
|
||||
|
||||
knob = GTK_KNOB (widget);
|
||||
|
||||
switch (knob->state) {
|
||||
|
||||
case STATE_PRESSED:
|
||||
gtk_grab_remove (widget);
|
||||
knob->state = STATE_IDLE;
|
||||
|
||||
switch (event->button) {
|
||||
case 1:
|
||||
knob->adjustment->value -= knob->adjustment->page_increment;
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
break;
|
||||
case 3:
|
||||
knob->adjustment->value += knob->adjustment->page_increment;
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case STATE_DRAGGING:
|
||||
gtk_grab_remove (widget);
|
||||
knob->state = STATE_IDLE;
|
||||
|
||||
switch (event->button) {
|
||||
case 1:
|
||||
case 3:
|
||||
if (knob->policy != GTK_UPDATE_CONTINUOUS
|
||||
&& knob->old_value != knob->adjustment->value)
|
||||
{
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_motion_notify()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static gint
|
||||
gtk_knob_motion_notify(GtkWidget *widget, GdkEventMotion *event) {
|
||||
GtkKnob *knob;
|
||||
GdkModifierType mods;
|
||||
gint x, y;
|
||||
|
||||
g_return_val_if_fail (widget != NULL, FALSE);
|
||||
g_return_val_if_fail (GTK_IS_KNOB (widget), FALSE);
|
||||
g_return_val_if_fail (event != NULL, FALSE);
|
||||
|
||||
knob = GTK_KNOB (widget);
|
||||
|
||||
x = event->x;
|
||||
y = event->y;
|
||||
|
||||
if (event->is_hint || (event->window != widget->window)) {
|
||||
gdk_window_get_pointer (widget->window, &x, &y, &mods);
|
||||
}
|
||||
|
||||
switch (knob->state) {
|
||||
|
||||
case STATE_PRESSED:
|
||||
knob->state = STATE_DRAGGING;
|
||||
/* fall through */
|
||||
|
||||
case STATE_DRAGGING:
|
||||
if (mods & GDK_BUTTON1_MASK) {
|
||||
gtk_knob_update_mouse (knob, x, y, TRUE);
|
||||
return TRUE;
|
||||
}
|
||||
else if (mods & GDK_BUTTON3_MASK) {
|
||||
gtk_knob_update_mouse (knob, x, y, FALSE);
|
||||
return TRUE;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_timer()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static gint
|
||||
gtk_knob_timer(GtkKnob *knob) {
|
||||
|
||||
g_return_val_if_fail (knob != NULL, FALSE);
|
||||
g_return_val_if_fail (GTK_IS_KNOB (knob), FALSE);
|
||||
|
||||
if (knob->policy == GTK_UPDATE_DELAYED) {
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
}
|
||||
|
||||
/* don't keep running this timer */
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_update_mouse_update()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static void
|
||||
gtk_knob_update_mouse_update(GtkKnob *knob) {
|
||||
|
||||
if (knob->policy == GTK_UPDATE_CONTINUOUS) {
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
}
|
||||
else {
|
||||
gtk_widget_draw (GTK_WIDGET (knob), NULL);
|
||||
|
||||
if (knob->policy == GTK_UPDATE_DELAYED) {
|
||||
if (knob->timer) {
|
||||
gtk_timeout_remove (knob->timer);
|
||||
}
|
||||
knob->timer = gtk_timeout_add (SCROLL_DELAY_LENGTH,
|
||||
(GtkFunction) gtk_knob_timer,
|
||||
(gpointer) knob);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_update_mouse()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static void
|
||||
gtk_knob_update_mouse(GtkKnob *knob, gint x, gint y, gboolean absolute) {
|
||||
gfloat old_value, new_value, dv, dh;
|
||||
gfloat angle;
|
||||
|
||||
g_return_if_fail (knob != NULL);
|
||||
g_return_if_fail (GTK_IS_KNOB (knob));
|
||||
|
||||
old_value = knob->adjustment->value;
|
||||
|
||||
angle = atan2f (-y + (knob->height >> 1), x - (knob->width >> 1));
|
||||
|
||||
if (absolute) {
|
||||
/* map [1.25pi, -0.25pi] onto [0, 1] */
|
||||
angle *= M_1_PI;
|
||||
if (angle < -0.5) {
|
||||
angle += 2.0;
|
||||
}
|
||||
new_value = -0.66666666666666666666 * (angle - 1.25);
|
||||
new_value *= knob->adjustment->upper - knob->adjustment->lower;
|
||||
new_value += knob->adjustment->lower;
|
||||
}
|
||||
else {
|
||||
/* inverted cartesian graphics coordinate system */
|
||||
dv = knob->saved_y - y;
|
||||
dh = x - knob->saved_x;
|
||||
knob->saved_x = x;
|
||||
knob->saved_y = y;
|
||||
|
||||
if ((x >= 0) && (x <= knob->width)) {
|
||||
dh = 0; /* dead zone */
|
||||
}
|
||||
else {
|
||||
angle = cosf (angle);
|
||||
dh *= angle * angle;
|
||||
}
|
||||
|
||||
new_value = knob->adjustment->value +
|
||||
dv * knob->adjustment->step_increment +
|
||||
dh * (knob->adjustment->upper -
|
||||
knob->adjustment->lower) * 0.005; /* 0.005 == (1 / 200) */
|
||||
}
|
||||
|
||||
new_value = MAX (MIN (new_value, knob->adjustment->upper),
|
||||
knob->adjustment->lower);
|
||||
|
||||
knob->adjustment->value = new_value;
|
||||
|
||||
if (knob->adjustment->value != old_value) {
|
||||
gtk_knob_update_mouse_update (knob);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_update()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static void
|
||||
gtk_knob_update(GtkKnob *knob) {
|
||||
gfloat new_value;
|
||||
|
||||
g_return_if_fail (knob != NULL);
|
||||
g_return_if_fail (GTK_IS_KNOB (knob));
|
||||
|
||||
if (knob->adjustment->step_increment == 1) {
|
||||
new_value = floor (knob->adjustment->value + 0.5);
|
||||
}
|
||||
else {
|
||||
new_value = knob->adjustment->value;
|
||||
}
|
||||
|
||||
if (new_value < knob->adjustment->lower) {
|
||||
new_value = knob->adjustment->lower;
|
||||
}
|
||||
|
||||
if (new_value > knob->adjustment->upper) {
|
||||
new_value = knob->adjustment->upper;
|
||||
}
|
||||
|
||||
if (new_value != knob->adjustment->value) {
|
||||
knob->adjustment->value = new_value;
|
||||
gtk_signal_emit_by_name (GTK_OBJECT (knob->adjustment),
|
||||
"value_changed");
|
||||
}
|
||||
|
||||
gtk_widget_draw (GTK_WIDGET (knob), NULL);
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_adjustment_changed()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static void
|
||||
gtk_knob_adjustment_changed(GtkAdjustment *adjustment, gpointer data) {
|
||||
GtkKnob *knob;
|
||||
|
||||
g_return_if_fail (adjustment != NULL);
|
||||
g_return_if_fail (data != NULL);
|
||||
|
||||
knob = GTK_KNOB (data);
|
||||
|
||||
if ((knob->old_value != adjustment->value) ||
|
||||
(knob->old_lower != adjustment->lower) ||
|
||||
(knob->old_upper != adjustment->upper))
|
||||
{
|
||||
gtk_knob_update (knob);
|
||||
|
||||
knob->old_value = adjustment->value;
|
||||
knob->old_lower = adjustment->lower;
|
||||
knob->old_upper = adjustment->upper;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_adjustment_value_changed()
|
||||
*
|
||||
*****************************************************************************/
|
||||
static void
|
||||
gtk_knob_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data) {
|
||||
GtkKnob *knob;
|
||||
|
||||
g_return_if_fail (adjustment != NULL);
|
||||
g_return_if_fail (data != NULL);
|
||||
|
||||
knob = GTK_KNOB (data);
|
||||
|
||||
if (knob->old_value != adjustment->value) {
|
||||
gtk_knob_update (knob);
|
||||
knob->old_value = adjustment->value;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_set_animation()
|
||||
*
|
||||
*****************************************************************************/
|
||||
void
|
||||
gtk_knob_set_animation (GtkKnob *knob, GtkKnobAnim *anim) {
|
||||
g_return_if_fail (knob != NULL);
|
||||
g_return_if_fail (anim != NULL);
|
||||
g_return_if_fail (GTK_IS_KNOB (knob));
|
||||
g_return_if_fail (GDK_IS_PIXBUF (anim->pixbuf));
|
||||
|
||||
knob->anim = (GtkKnobAnim *)anim;
|
||||
knob->width = anim->frame_width;
|
||||
knob->height = anim->height;
|
||||
|
||||
if (GTK_WIDGET_REALIZED (knob)) {
|
||||
gtk_widget_queue_resize (GTK_WIDGET (knob));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_animation_new_from_file()
|
||||
*
|
||||
*****************************************************************************/
|
||||
GtkKnobAnim *
|
||||
gtk_knob_animation_new_from_file(gchar *filename) {
|
||||
GtkKnobAnim *anim;
|
||||
|
||||
anim = gtk_knob_animation_new_from_file_full (filename, -1, -1, KNOB_SIZE);
|
||||
return anim;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
*
|
||||
* gtk_knob_new_from_file_full()
|
||||
*
|
||||
* frame_width: overrides the frame width (to make rectangular frames)
|
||||
* but doesn't affect the image size width and height cause optional
|
||||
* scaling if not set to -1 when they are derived from the native
|
||||
* image size.
|
||||
*
|
||||
* FIXME: account for any problems where (width % frame_width != 0)
|
||||
*
|
||||
*****************************************************************************/
|
||||
GtkKnobAnim *
|
||||
gtk_knob_animation_new_from_file_full(gchar *filename, gint frame_width,
|
||||
gint width, gint height) {
|
||||
GtkKnobAnim *anim = g_new0 (GtkKnobAnim, 1);
|
||||
|
||||
g_return_val_if_fail ((filename != NULL), NULL);
|
||||
|
||||
#if GTK_MINOR_VERSION < 10
|
||||
if (!(anim->pixbuf = gdk_pixbuf_new_from_file (filename, &gerror))) {
|
||||
return NULL;
|
||||
}
|
||||
#else /* GTK_MINOR_VERSION >= 10 */
|
||||
if (!(anim->pixbuf = gdk_pixbuf_new_from_file_at_size (filename, width,
|
||||
height, &gerror))) {
|
||||
return NULL;
|
||||
}
|
||||
#endif /* GTK_MINOR_VERSION < 10 */
|
||||
else {
|
||||
anim->height = gdk_pixbuf_get_height (anim->pixbuf);
|
||||
anim->width = gdk_pixbuf_get_width (anim->pixbuf);
|
||||
anim->frame_width = (frame_width != -1) ? frame_width : anim->height;
|
||||
}
|
||||
|
||||
return anim;
|
||||
}
|
||||
Reference in New Issue
Block a user