/* LIBGIMP - The GIMP Library * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball * * gimpmemsizeentry.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 "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; }