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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 3 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, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "gimpwidgetstypes.h"
#include "gimpmemsizeentry.h"
#include "gimpspinbutton.h"
#include "gimpwidgets.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpmemsizeentry
* @title: GimpMemSizeEntry
* @short_description: A composite widget to enter a memory size.
*
* Similar to a #GimpSizeEntry but instead of lengths, this widget is
* used to let the user enter memory sizes. A combo box allows one to
* switch between Kilobytes, Megabytes and Gigabytes. Used in the GIMP
* preferences dialog.
**/
enum
{
VALUE_CHANGED,
LAST_SIGNAL
};
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 guint64 gimp_memsize_entry_get_rounded_value (GimpMemsizeEntry *entry,
guint64 value);
G_DEFINE_TYPE (GimpMemsizeEntry, gimp_memsize_entry, GTK_TYPE_BOX)
#define parent_class gimp_memsize_entry_parent_class
static guint gimp_memsize_entry_signals[LAST_SIGNAL] = { 0 };
static void
gimp_memsize_entry_class_init (GimpMemsizeEntryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_memsize_entry_finalize;
klass->value_changed = NULL;
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);
}
static void
gimp_memsize_entry_init (GimpMemsizeEntry *entry)
{
gtk_orientable_set_orientation (GTK_ORIENTABLE (entry),
GTK_ORIENTATION_HORIZONTAL);
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;
g_clear_object (&entry->adjustment);
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);
if (gimp_memsize_entry_get_rounded_value (entry, entry->value) != size)
/* Do not allow losing accuracy if the converted/displayed value
* stays the same.
*/
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;
gtk_adjustment_configure (entry->adjustment,
gimp_memsize_entry_get_rounded_value (entry, entry->value),
CAST entry->lower >> shift,
CAST entry->upper >> shift,
gtk_adjustment_get_step_increment (entry->adjustment),
gtk_adjustment_get_page_increment (entry->adjustment),
gtk_adjustment_get_page_size (entry->adjustment));
}
#undef CAST
}
/**
* gimp_memsize_entry_get_rounded_value:
* @entry: #GimpMemsizeEntry whose set unit is used.
* @value: value to convert to @entry unit, and rounded.
*
* Returns: the proper integer value to be displayed for current unit.
* This value has been appropriately rounded to the nearest
* integer, away from zero.
*/
static guint64
gimp_memsize_entry_get_rounded_value (GimpMemsizeEntry *entry,
guint64 value)
{
guint64 converted;
#if _MSC_VER < 1300
# define CAST (gint64)
#else
# define CAST
#endif
converted = (CAST value >> entry->shift) +
((CAST entry->value >> (entry->shift - 1)) & 1);
#undef CAST
return converted;
}
/**
* 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;
GtkAdjustment *adj;
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 > (G_GUINT64_CONSTANT (1) << shift) &&
value % (G_GUINT64_CONSTANT (1) << shift) == 0)
break;
}
entry->value = value;
entry->lower = lower;
entry->upper = upper;
entry->shift = shift;
adj = (GtkAdjustment *) gtk_adjustment_new (gimp_memsize_entry_get_rounded_value (entry,
entry->value),
CAST (lower >> shift),
CAST (upper >> shift),
1, 8, 0);
entry->spinbutton = gimp_spin_button_new (adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (entry->spinbutton), TRUE);
#undef CAST
entry->adjustment = GTK_ADJUSTMENT (adj);
g_object_ref_sink (entry->adjustment);
gtk_entry_set_width_chars (GTK_ENTRY (entry->spinbutton), 7);
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 (_("Kibibyte"), 10,
_("Mebibyte"), 20,
_("Gibibyte"), 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 > (G_GUINT64_CONSTANT (1) << shift) &&
value % (G_GUINT64_CONSTANT (1) << shift) == 0)
break;
}
if (shift != entry->shift)
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (entry->menu), shift);
gtk_adjustment_set_value (entry->adjustment,
(gdouble) gimp_memsize_entry_get_rounded_value (entry, value));
#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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