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gimp/libgimpwidgets/gimpmemsizeentry.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpmemsizeentry.c
* Copyright (C) 2000-2003 Sven Neumann <sven@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 Lesser 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 "config.h"
#include <gtk/gtk.h>
#include "gimpwidgetstypes.h"
#include "gimpmemsizeentry.h"
#include "gimpwidgets.h"
#include "libgimp/libgimp-intl.h"
enum
{
VALUE_CHANGED,
LAST_SIGNAL
};
static void gimp_memsize_entry_class_init (GimpMemsizeEntryClass *klass);
static void gimp_memsize_entry_init (GimpMemsizeEntry *entry);
static void gimp_memsize_entry_finalize (GObject *object);
static void gimp_memsize_entry_adj_callback (GtkAdjustment *adj,
GimpMemsizeEntry *entry);
static void gimp_memsize_entry_unit_callback (GtkWidget *widget,
GimpMemsizeEntry *entry);
static guint gimp_memsize_entry_signals[LAST_SIGNAL] = { 0 };
static GtkHBoxClass *parent_class = NULL;
GType
gimp_memsize_entry_get_type (void)
{
static GType entry_type = 0;
if (! entry_type)
{
static const GTypeInfo entry_info =
{
sizeof (GimpMemsizeEntryClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_memsize_entry_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpMemsizeEntry),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_memsize_entry_init,
};
entry_type = g_type_register_static (GTK_TYPE_HBOX, "GimpMemsizeEntry",
&entry_info, 0);
}
return entry_type;
}
static void
gimp_memsize_entry_class_init (GimpMemsizeEntryClass *klass)
{
GObjectClass *object_class;
parent_class = g_type_class_peek_parent (klass);
object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_memsize_entry_finalize;
gimp_memsize_entry_signals[VALUE_CHANGED] =
g_signal_new ("value_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpMemsizeEntryClass, value_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
klass->value_changed = NULL;
}
static void
gimp_memsize_entry_init (GimpMemsizeEntry *entry)
{
gtk_box_set_spacing (GTK_BOX (entry), 4);
entry->value = 0;
entry->lower = 0;
entry->upper = 0;
entry->shift = 0;
entry->adjustment = NULL;
entry->menu = NULL;
}
static void
gimp_memsize_entry_finalize (GObject *object)
{
GimpMemsizeEntry *entry = (GimpMemsizeEntry *) object;
if (entry->adjustment)
{
g_object_unref (entry->adjustment);
entry->adjustment = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_memsize_entry_adj_callback (GtkAdjustment *adj,
GimpMemsizeEntry *entry)
{
guint64 size = gtk_adjustment_get_value (adj);
entry->value = size << entry->shift;
g_signal_emit (entry, gimp_memsize_entry_signals[VALUE_CHANGED], 0);
}
static void
gimp_memsize_entry_unit_callback (GtkWidget *widget,
GimpMemsizeEntry *entry)
{
guint shift;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), (gint *) &shift);
#if _MSC_VER < 1300
# define CAST (gint64)
#else
# define CAST
#endif
if (shift != entry->shift)
{
entry->shift = shift;
entry->adjustment->value = CAST entry->value >> shift;
entry->adjustment->lower = CAST entry->lower >> shift;
entry->adjustment->upper = CAST entry->upper >> shift;
gtk_adjustment_value_changed (entry->adjustment);
gtk_adjustment_changed (entry->adjustment);
}
#undef CAST
}
/**
* gimp_memsize_entry_new:
* @value: the initial value (in Bytes)
* @lower: the lower limit for the value (in Bytes)
* @upper: the upper limit for the value (in Bytes)
*
* Creates a new #GimpMemsizeEntry which is a #GtkHBox with a #GtkSpinButton
* and a #GtkOptionMenu all setup to allow the user to enter memory sizes.
*
* Returns: Pointer to the new #GimpMemsizeEntry.
**/
GtkWidget *
gimp_memsize_entry_new (guint64 value,
guint64 lower,
guint64 upper)
{
GimpMemsizeEntry *entry;
guint shift;
#if _MSC_VER < 1300
# define CAST (gint64)
#else
# define CAST
#endif
g_return_val_if_fail (value >= lower && value <= upper, NULL);
entry = g_object_new (GIMP_TYPE_MEMSIZE_ENTRY, NULL);
for (shift = 30; shift > 10; shift -= 10)
{
if (value > ((guint64) 1 << shift) &&
value % ((guint64) 1 << shift) == 0)
break;
}
entry->value = value;
entry->lower = lower;
entry->upper = upper;
entry->shift = shift;
entry->spinbutton = gimp_spin_button_new ((GtkObject **) &entry->adjustment,
CAST (value >> shift),
CAST (lower >> shift),
CAST (upper >> shift),
1, 8, 0, 1, 0);
#undef CAST
g_object_ref (entry->adjustment);
gtk_object_sink (GTK_OBJECT (entry->adjustment));
gtk_entry_set_width_chars (GTK_ENTRY (entry->spinbutton), 10);
gtk_box_pack_start (GTK_BOX (entry), entry->spinbutton, FALSE, FALSE, 0);
gtk_widget_show (entry->spinbutton);
g_signal_connect (entry->adjustment, "value_changed",
G_CALLBACK (gimp_memsize_entry_adj_callback),
entry);
entry->menu = gimp_int_combo_box_new (_("Kilobytes"), 10,
_("Megabytes"), 20,
_("Gigabytes"), 30,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (entry->menu), shift);
g_signal_connect (entry->menu, "changed",
G_CALLBACK (gimp_memsize_entry_unit_callback),
entry);
gtk_box_pack_start (GTK_BOX (entry), entry->menu, FALSE, FALSE, 0);
gtk_widget_show (entry->menu);
return GTK_WIDGET (entry);
}
/**
* gimp_memsize_entry_set_value:
* @entry: a #GimpMemsizeEntry
* @value: the new value (in Bytes)
*
* Sets the @entry's value. Please note that the #GimpMemsizeEntry rounds
* the value to full Kilobytes.
**/
void
gimp_memsize_entry_set_value (GimpMemsizeEntry *entry,
guint64 value)
{
guint shift;
g_return_if_fail (GIMP_IS_MEMSIZE_ENTRY (entry));
g_return_if_fail (value >= entry->lower && value <= entry->upper);
for (shift = 30; shift > 10; shift -= 10)
{
if (value > ((guint64) 1 << shift) &&
value % ((guint64) 1 << shift) == 0)
break;
}
if (shift != entry->shift)
{
entry->shift = shift;
entry->value = value;
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (entry->menu), shift);
}
#if _MSC_VER < 1300
# define CAST (gint64)
#else
# define CAST
#endif
gtk_adjustment_set_value (entry->adjustment, CAST (value >> shift));
#undef CASE
}
/**
* gimp_memsize_entry_get_value:
* @entry: a #GimpMemsizeEntry
*
* Retrieves the current value from a #GimpMemsizeEntry.
*
* Returns: the current value of @entry (in Bytes).
**/
guint64
gimp_memsize_entry_get_value (GimpMemsizeEntry *entry)
{
g_return_val_if_fail (GIMP_IS_MEMSIZE_ENTRY (entry), 0);
return entry->value;
}
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