/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "gtkadjustment.h" #include "gtksignal.h" enum { CHANGED, VALUE_CHANGED, LAST_SIGNAL }; static void gtk_adjustment_class_init (GtkAdjustmentClass *klass); static void gtk_adjustment_init (GtkAdjustment *adjustment); static guint adjustment_signals[LAST_SIGNAL] = { 0 }; guint gtk_adjustment_get_type () { static guint adjustment_type = 0; if (!adjustment_type) { GtkTypeInfo adjustment_info = { "GtkAdjustment", sizeof (GtkAdjustment), sizeof (GtkAdjustmentClass), (GtkClassInitFunc) gtk_adjustment_class_init, (GtkObjectInitFunc) gtk_adjustment_init, (GtkArgSetFunc) NULL, (GtkArgGetFunc) NULL, }; adjustment_type = gtk_type_unique (gtk_data_get_type (), &adjustment_info); } return adjustment_type; } static void gtk_adjustment_class_init (GtkAdjustmentClass *class) { GtkObjectClass *object_class; object_class = (GtkObjectClass*) class; adjustment_signals[CHANGED] = gtk_signal_new ("changed", GTK_RUN_FIRST | GTK_RUN_NO_RECURSE, object_class->type, GTK_SIGNAL_OFFSET (GtkAdjustmentClass, changed), gtk_signal_default_marshaller, GTK_TYPE_NONE, 0); adjustment_signals[VALUE_CHANGED] = gtk_signal_new ("value_changed", GTK_RUN_FIRST | GTK_RUN_NO_RECURSE, object_class->type, GTK_SIGNAL_OFFSET (GtkAdjustmentClass, value_changed), gtk_signal_default_marshaller, GTK_TYPE_NONE, 0); gtk_object_class_add_signals (object_class, adjustment_signals, LAST_SIGNAL); class->changed = NULL; class->value_changed = NULL; } static void gtk_adjustment_init (GtkAdjustment *adjustment) { adjustment->value = 0.0; adjustment->lower = 0.0; adjustment->upper = 0.0; adjustment->step_increment = 0.0; adjustment->page_increment = 0.0; adjustment->page_size = 0.0; } GtkObject* gtk_adjustment_new (gfloat value, gfloat lower, gfloat upper, gfloat step_increment, gfloat page_increment, gfloat page_size) { GtkAdjustment *adjustment; adjustment = gtk_type_new (gtk_adjustment_get_type ()); adjustment->value = value; adjustment->lower = lower; adjustment->upper = upper; adjustment->step_increment = step_increment; adjustment->page_increment = page_increment; adjustment->page_size = page_size; return GTK_OBJECT (adjustment); } void gtk_adjustment_set_value (GtkAdjustment *adjustment, gfloat value) { g_return_if_fail (adjustment != NULL); g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); adjustment->value = CLAMP (value, adjustment->lower, adjustment->upper); gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed"); }