/* LIBPIKA - The PIKA Library * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball * * pikamemsizeentry.c * Copyright (C) 2000-2003 Sven Neumann * * 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 * . */ #include "config.h" #include #include #include "pikawidgetstypes.h" #include "pikamemsizeentry.h" #include "pikawidgets.h" #include "libpika/libpika-intl.h" /** * SECTION: pikamemsizeentry * @title: PikaMemSizeEntry * @short_description: A composite widget to enter a memory size. * * Similar to a #PikaSizeEntry 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 PIKA * preferences dialog. **/ enum { VALUE_CHANGED, LAST_SIGNAL }; struct _PikaMemsizeEntryPrivate { guint64 value; guint64 lower; guint64 upper; guint shift; /* adjustment is owned by spinbutton. Do not unref() it. */ GtkAdjustment *adjustment; GtkWidget *spinbutton; GtkWidget *menu; }; #define GET_PRIVATE(obj) (((PikaMemsizeEntry *) (obj))->priv) static void pika_memsize_entry_adj_callback (GtkAdjustment *adj, PikaMemsizeEntry *entry); static void pika_memsize_entry_unit_callback (GtkWidget *widget, PikaMemsizeEntry *entry); static guint64 pika_memsize_entry_get_rounded_value (PikaMemsizeEntry *entry, guint64 value); G_DEFINE_TYPE_WITH_PRIVATE (PikaMemsizeEntry, pika_memsize_entry, GTK_TYPE_BOX) #define parent_class pika_memsize_entry_parent_class static guint pika_memsize_entry_signals[LAST_SIGNAL] = { 0 }; static void pika_memsize_entry_class_init (PikaMemsizeEntryClass *klass) { klass->value_changed = NULL; pika_memsize_entry_signals[VALUE_CHANGED] = g_signal_new ("value-changed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (PikaMemsizeEntryClass, value_changed), NULL, NULL, NULL, G_TYPE_NONE, 0); } static void pika_memsize_entry_init (PikaMemsizeEntry *entry) { entry->priv = pika_memsize_entry_get_instance_private (entry); gtk_orientable_set_orientation (GTK_ORIENTABLE (entry), GTK_ORIENTATION_HORIZONTAL); gtk_box_set_spacing (GTK_BOX (entry), 4); } static void pika_memsize_entry_adj_callback (GtkAdjustment *adj, PikaMemsizeEntry *entry) { PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry); guint64 size = gtk_adjustment_get_value (adj); if (pika_memsize_entry_get_rounded_value (entry, private->value) != size) /* Do not allow losing accuracy if the converted/displayed value * stays the same. */ private->value = size << private->shift; g_signal_emit (entry, pika_memsize_entry_signals[VALUE_CHANGED], 0); } static void pika_memsize_entry_unit_callback (GtkWidget *widget, PikaMemsizeEntry *entry) { PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry); guint shift; pika_int_combo_box_get_active (PIKA_INT_COMBO_BOX (widget), (gint *) &shift); #if _MSC_VER < 1300 # define CAST (gint64) #else # define CAST #endif if (shift != private->shift) { private->shift = shift; gtk_adjustment_configure (private->adjustment, pika_memsize_entry_get_rounded_value (entry, private->value), CAST private->lower >> shift, CAST private->upper >> shift, gtk_adjustment_get_step_increment (private->adjustment), gtk_adjustment_get_page_increment (private->adjustment), gtk_adjustment_get_page_size (private->adjustment)); } #undef CAST } /** * pika_memsize_entry_get_rounded_value: * @entry: #PikaMemsizeEntry 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 pika_memsize_entry_get_rounded_value (PikaMemsizeEntry *entry, guint64 value) { PikaMemsizeEntryPrivate *private = GET_PRIVATE (entry); guint64 converted; #if _MSC_VER < 1300 # define CAST (gint64) #else # define CAST #endif converted = (CAST value >> private->shift) + ((CAST private->value >> (private->shift - 1)) & 1); #undef CAST return converted; } /** * pika_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 #PikaMemsizeEntry 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 #PikaMemsizeEntry. **/ GtkWidget * pika_memsize_entry_new (guint64 value, guint64 lower, guint64 upper) { PikaMemsizeEntry *entry; PikaMemsizeEntryPrivate *private; 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 (PIKA_TYPE_MEMSIZE_ENTRY, NULL); private = GET_PRIVATE (entry); for (shift = 30; shift > 10; shift -= 10) { if (value > (G_GUINT64_CONSTANT (1) << shift) && value % (G_GUINT64_CONSTANT (1) << shift) == 0) break; } private->value = value; private->lower = lower; private->upper = upper; private->shift = shift; private->adjustment = gtk_adjustment_new (pika_memsize_entry_get_rounded_value (entry, private->value), CAST (lower >> shift), CAST (upper >> shift), 1, 8, 0); private->spinbutton = pika_spin_button_new (private->adjustment, 1.0, 0); gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (private->spinbutton), TRUE); #undef CAST gtk_entry_set_width_chars (GTK_ENTRY (private->spinbutton), 7); gtk_box_pack_start (GTK_BOX (entry), private->spinbutton, FALSE, FALSE, 0); gtk_widget_show (private->spinbutton); g_signal_connect (private->adjustment, "value-changed", G_CALLBACK (pika_memsize_entry_adj_callback), entry); private->menu = pika_int_combo_box_new (_("Kibibyte"), 10, _("Mebibyte"), 20, _("Gibibyte"), 30, NULL); pika_int_combo_box_set_active (PIKA_INT_COMBO_BOX (private->menu), shift); g_signal_connect (private->menu, "changed", G_CALLBACK (pika_memsize_entry_unit_callback), entry); gtk_box_pack_start (GTK_BOX (entry), private->menu, FALSE, FALSE, 0); gtk_widget_show (private->menu); return GTK_WIDGET (entry); } /** * pika_memsize_entry_set_value: * @entry: a #PikaMemsizeEntry * @value: the new value (in Bytes) * * Sets the @entry's value. Please note that the #PikaMemsizeEntry rounds * the value to full Kilobytes. **/ void pika_memsize_entry_set_value (PikaMemsizeEntry *entry, guint64 value) { PikaMemsizeEntryPrivate *private; guint shift; g_return_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry)); private = GET_PRIVATE (entry); g_return_if_fail (value >= private->lower && value <= private->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 != private->shift) pika_int_combo_box_set_active (PIKA_INT_COMBO_BOX (private->menu), shift); gtk_adjustment_set_value (private->adjustment, (gdouble) pika_memsize_entry_get_rounded_value (entry, value)); #undef CASE } /** * pika_memsize_entry_get_value: * @entry: a #PikaMemsizeEntry * * Retrieves the current value from a #PikaMemsizeEntry. * * Returns: the current value of @entry (in Bytes). **/ guint64 pika_memsize_entry_get_value (PikaMemsizeEntry *entry) { g_return_val_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry), 0); return GET_PRIVATE (entry)->value; } /** * pika_memsize_entry_get_spinbutton: * @entry: a #PikaMemsizeEntry * * Returns: (transfer none) (type GtkSpinButton): the entry's #GtkSpinbutton. * * Since: 3.0 **/ GtkWidget * pika_memsize_entry_get_spinbutton (PikaMemsizeEntry *entry) { g_return_val_if_fail (PIKA_IS_MEMSIZE_ENTRY (entry), 0); return GET_PRIVATE (entry)->spinbutton; }