337 lines
9.6 KiB
C
337 lines
9.6 KiB
C
/* LIBPIKA - The PIKA Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* pikamemsizeentry.c
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* Copyright (C) 2000-2003 Sven Neumann <sven@gimp.org>
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 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 Lesser General Public
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* License along with this library. If not, see
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* <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "pikawidgetstypes.h"
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#include "pikamemsizeentry.h"
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#include "pikawidgets.h"
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#include "libpika/libpika-intl.h"
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/**
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* SECTION: pikamemsizeentry
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* @title: PikaMemSizeEntry
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* @short_description: A composite widget to enter a memory size.
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*
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* Similar to a #PikaSizeEntry but instead of lengths, this widget is
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* used to let the user enter memory sizes. A combo box allows one to
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* switch between Kilobytes, Megabytes and Gigabytes. Used in the PIKA
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* preferences dialog.
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**/
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enum
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{
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VALUE_CHANGED,
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LAST_SIGNAL
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};
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struct _PikaMemsizeEntryPrivate
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{
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guint64 value;
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guint64 lower;
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guint64 upper;
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guint shift;
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/* adjustment is owned by spinbutton. Do not unref() it. */
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GtkAdjustment *adjustment;
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GtkWidget *spinbutton;
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GtkWidget *menu;
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};
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#define GET_PRIVATE(obj) (((PikaMemsizeEntry *) (obj))->priv)
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static void pika_memsize_entry_adj_callback (GtkAdjustment *adj,
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PikaMemsizeEntry *entry);
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static void pika_memsize_entry_unit_callback (GtkWidget *widget,
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PikaMemsizeEntry *entry);
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static guint64 pika_memsize_entry_get_rounded_value (PikaMemsizeEntry *entry,
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guint64 value);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaMemsizeEntry, pika_memsize_entry, GTK_TYPE_BOX)
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#define parent_class pika_memsize_entry_parent_class
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static guint pika_memsize_entry_signals[LAST_SIGNAL] = { 0 };
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static void
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pika_memsize_entry_class_init (PikaMemsizeEntryClass *klass)
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{
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klass->value_changed = NULL;
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pika_memsize_entry_signals[VALUE_CHANGED] =
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g_signal_new ("value-changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaMemsizeEntryClass, value_changed),
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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}
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static void
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pika_memsize_entry_init (PikaMemsizeEntry *entry)
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{
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entry->priv = pika_memsize_entry_get_instance_private (entry);
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gtk_orientable_set_orientation (GTK_ORIENTABLE (entry),
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GTK_ORIENTATION_HORIZONTAL);
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gtk_box_set_spacing (GTK_BOX (entry), 4);
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}
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static void
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pika_memsize_entry_adj_callback (GtkAdjustment *adj,
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PikaMemsizeEntry *entry)
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{
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PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry);
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guint64 size = gtk_adjustment_get_value (adj);
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if (pika_memsize_entry_get_rounded_value (entry, private->value) != size)
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/* Do not allow losing accuracy if the converted/displayed value
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* stays the same.
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*/
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private->value = size << private->shift;
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g_signal_emit (entry, pika_memsize_entry_signals[VALUE_CHANGED], 0);
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}
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static void
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pika_memsize_entry_unit_callback (GtkWidget *widget,
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PikaMemsizeEntry *entry)
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{
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PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry);
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guint shift;
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pika_int_combo_box_get_active (PIKA_INT_COMBO_BOX (widget), (gint *) &shift);
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#if _MSC_VER < 1300
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# define CAST (gint64)
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#else
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# define CAST
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#endif
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if (shift != private->shift)
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{
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private->shift = shift;
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gtk_adjustment_configure (private->adjustment,
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pika_memsize_entry_get_rounded_value (entry, private->value),
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CAST private->lower >> shift,
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CAST private->upper >> shift,
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gtk_adjustment_get_step_increment (private->adjustment),
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gtk_adjustment_get_page_increment (private->adjustment),
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gtk_adjustment_get_page_size (private->adjustment));
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}
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#undef CAST
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}
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/**
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* pika_memsize_entry_get_rounded_value:
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* @entry: #PikaMemsizeEntry whose set unit is used.
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* @value: value to convert to @entry unit, and rounded.
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*
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* Returns: the proper integer value to be displayed for current unit.
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* This value has been appropriately rounded to the nearest
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* integer, away from zero.
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*/
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static guint64
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pika_memsize_entry_get_rounded_value (PikaMemsizeEntry *entry,
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guint64 value)
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{
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PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry);
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guint64 converted;
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#if _MSC_VER < 1300
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# define CAST (gint64)
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#else
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# define CAST
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#endif
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converted = (CAST value >> private->shift) +
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((CAST private->value >> (private->shift - 1)) & 1);
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#undef CAST
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return converted;
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}
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/**
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* pika_memsize_entry_new:
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* @value: the initial value (in Bytes)
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* @lower: the lower limit for the value (in Bytes)
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* @upper: the upper limit for the value (in Bytes)
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*
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* Creates a new #PikaMemsizeEntry which is a #GtkHBox with a #GtkSpinButton
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* and a #GtkOptionMenu all setup to allow the user to enter memory sizes.
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*
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* Returns: Pointer to the new #PikaMemsizeEntry.
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**/
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GtkWidget *
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pika_memsize_entry_new (guint64 value,
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guint64 lower,
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guint64 upper)
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{
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PikaMemsizeEntry *entry;
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PikaMemsizeEntryPrivate *private;
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guint shift;
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#if _MSC_VER < 1300
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# define CAST (gint64)
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#else
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# define CAST
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#endif
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g_return_val_if_fail (value >= lower && value <= upper, NULL);
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entry = g_object_new (PIKA_TYPE_MEMSIZE_ENTRY, NULL);
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private = GET_PRIVATE (entry);
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for (shift = 30; shift > 10; shift -= 10)
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{
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if (value > (G_GUINT64_CONSTANT (1) << shift) &&
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value % (G_GUINT64_CONSTANT (1) << shift) == 0)
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break;
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}
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private->value = value;
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private->lower = lower;
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private->upper = upper;
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private->shift = shift;
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private->adjustment = gtk_adjustment_new (pika_memsize_entry_get_rounded_value (entry,
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private->value),
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CAST (lower >> shift),
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CAST (upper >> shift),
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1, 8, 0);
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private->spinbutton = pika_spin_button_new (private->adjustment, 1.0, 0);
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gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (private->spinbutton), TRUE);
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#undef CAST
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gtk_entry_set_width_chars (GTK_ENTRY (private->spinbutton), 7);
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gtk_box_pack_start (GTK_BOX (entry), private->spinbutton, FALSE, FALSE, 0);
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gtk_widget_show (private->spinbutton);
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g_signal_connect (private->adjustment, "value-changed",
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G_CALLBACK (pika_memsize_entry_adj_callback),
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entry);
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private->menu = pika_int_combo_box_new (_("Kibibyte"), 10,
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_("Mebibyte"), 20,
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_("Gibibyte"), 30,
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NULL);
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pika_int_combo_box_set_active (PIKA_INT_COMBO_BOX (private->menu), shift);
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g_signal_connect (private->menu, "changed",
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G_CALLBACK (pika_memsize_entry_unit_callback),
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entry);
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gtk_box_pack_start (GTK_BOX (entry), private->menu, FALSE, FALSE, 0);
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gtk_widget_show (private->menu);
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return GTK_WIDGET (entry);
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}
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/**
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* pika_memsize_entry_set_value:
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* @entry: a #PikaMemsizeEntry
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* @value: the new value (in Bytes)
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*
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* Sets the @entry's value. Please note that the #PikaMemsizeEntry rounds
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* the value to full Kilobytes.
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**/
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void
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pika_memsize_entry_set_value (PikaMemsizeEntry *entry,
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guint64 value)
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{
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PikaMemsizeEntryPrivate *private;
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guint shift;
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g_return_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry));
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private = GET_PRIVATE (entry);
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g_return_if_fail (value >= private->lower && value <= private->upper);
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for (shift = 30; shift > 10; shift -= 10)
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{
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if (value > (G_GUINT64_CONSTANT (1) << shift) &&
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value % (G_GUINT64_CONSTANT (1) << shift) == 0)
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break;
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}
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if (shift != private->shift)
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pika_int_combo_box_set_active (PIKA_INT_COMBO_BOX (private->menu), shift);
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gtk_adjustment_set_value (private->adjustment,
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(gdouble) pika_memsize_entry_get_rounded_value (entry, value));
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#undef CASE
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}
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/**
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* pika_memsize_entry_get_value:
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* @entry: a #PikaMemsizeEntry
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*
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* Retrieves the current value from a #PikaMemsizeEntry.
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*
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* Returns: the current value of @entry (in Bytes).
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**/
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guint64
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pika_memsize_entry_get_value (PikaMemsizeEntry *entry)
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{
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g_return_val_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry), 0);
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return GET_PRIVATE (entry)->value;
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}
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/**
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* pika_memsize_entry_get_spinbutton:
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* @entry: a #PikaMemsizeEntry
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*
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* Returns: (transfer none) (type GtkSpinButton): the entry's #GtkSpinbutton.
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*
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* Since: 3.0
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**/
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GtkWidget *
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pika_memsize_entry_get_spinbutton (PikaMemsizeEntry *entry)
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{
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g_return_val_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry), 0);
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return GET_PRIVATE (entry)->spinbutton;
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}
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