forked from AuroraMiddleware/gtk
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "gtkadjustment.h"
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#include "gtksignal.h"
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enum {
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CHANGED,
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VALUE_CHANGED,
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LAST_SIGNAL
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};
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static void gtk_adjustment_class_init (GtkAdjustmentClass *klass);
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static void gtk_adjustment_init (GtkAdjustment *adjustment);
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static gint adjustment_signals[LAST_SIGNAL] = { 0 };
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guint
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gtk_adjustment_get_type ()
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{
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static guint adjustment_type = 0;
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if (!adjustment_type)
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{
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GtkTypeInfo adjustment_info =
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{
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"GtkAdjustment",
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sizeof (GtkAdjustment),
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sizeof (GtkAdjustmentClass),
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(GtkClassInitFunc) gtk_adjustment_class_init,
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(GtkObjectInitFunc) gtk_adjustment_init,
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(GtkArgSetFunc) NULL,
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(GtkArgGetFunc) NULL,
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};
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adjustment_type = gtk_type_unique (gtk_data_get_type (), &adjustment_info);
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}
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return adjustment_type;
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}
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static void
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gtk_adjustment_class_init (GtkAdjustmentClass *class)
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{
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GtkObjectClass *object_class;
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object_class = (GtkObjectClass*) class;
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adjustment_signals[CHANGED] =
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gtk_signal_new ("changed",
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GTK_RUN_FIRST | GTK_RUN_NO_RECURSE,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkAdjustmentClass, changed),
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gtk_signal_default_marshaller,
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GTK_TYPE_NONE, 0);
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adjustment_signals[VALUE_CHANGED] =
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gtk_signal_new ("value_changed",
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GTK_RUN_FIRST | GTK_RUN_NO_RECURSE,
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object_class->type,
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GTK_SIGNAL_OFFSET (GtkAdjustmentClass, value_changed),
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gtk_signal_default_marshaller,
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GTK_TYPE_NONE, 0);
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gtk_object_class_add_signals (object_class, adjustment_signals, LAST_SIGNAL);
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class->changed = NULL;
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class->value_changed = NULL;
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}
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static void
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gtk_adjustment_init (GtkAdjustment *adjustment)
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{
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adjustment->value = 0.0;
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adjustment->lower = 0.0;
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adjustment->upper = 0.0;
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adjustment->step_increment = 0.0;
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adjustment->page_increment = 0.0;
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adjustment->page_size = 0.0;
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}
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GtkObject*
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gtk_adjustment_new (gfloat value,
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gfloat lower,
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gfloat upper,
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gfloat step_increment,
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gfloat page_increment,
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gfloat page_size)
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{
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GtkAdjustment *adjustment;
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adjustment = gtk_type_new (gtk_adjustment_get_type ());
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adjustment->value = value;
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adjustment->lower = lower;
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adjustment->upper = upper;
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adjustment->step_increment = step_increment;
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adjustment->page_increment = page_increment;
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adjustment->page_size = page_size;
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return GTK_OBJECT (adjustment);
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}
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void
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gtk_adjustment_set_value (GtkAdjustment *adjustment,
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gfloat value)
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{
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g_return_if_fail (adjustment != NULL);
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g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
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adjustment->value = CLAMP (value, adjustment->lower, adjustment->upper);
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gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed");
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}
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