gimpmemsizeentry.c 7.37 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
/* 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)
{
108 109
  gtk_box_set_spacing (GTK_BOX (entry), 2);

110 111 112 113 114 115 116 117 118 119 120 121
  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;
122

123 124 125 126 127
  if (entry->adjustment)
    {
      g_object_unref (entry->adjustment);
      entry->adjustment = NULL;
    }
128

129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
  G_OBJECT_CLASS (parent_class)->finalize (object);
}

/**
 * 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 (gulong  value,
			gulong  lower,
			gulong  upper)
{
  GimpMemsizeEntry *entry;
  guint             shift;

  g_return_val_if_fail (value >= lower && value <= upper, NULL);

153
  entry = g_object_new (GIMP_TYPE_MEMSIZE_ENTRY, NULL);
154 155 156 157 158 159 160 161 162 163 164

  for (shift = 30; shift > 10; shift -= 10)
    {
      if (value > (1 << shift) && value % (1 << shift) == 0)
        break;
    }

  entry->value = value;
  entry->lower = lower;
  entry->upper = upper;
  entry->shift = shift;
165

166 167 168 169
  entry->spinbutton = gimp_spin_button_new ((GtkObject **) &entry->adjustment,
                                            value >> shift,
                                            lower >> shift,
                                            upper >> shift, 1, 8, 0, 1, 0);
170 171 172 173

  g_object_ref (entry->adjustment);
  gtk_object_sink (GTK_OBJECT (entry->adjustment));

174 175 176
  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);
177

178
  g_signal_connect (entry->adjustment, "value_changed",
179 180
                    G_CALLBACK (gimp_memsize_entry_adj_callback),
                    entry);
181

182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
  entry->menu =
    gimp_option_menu_new2 (FALSE,
			   G_CALLBACK (gimp_memsize_entry_unit_callback),
			   entry,
			   GUINT_TO_POINTER (shift),
			   _("KiloBytes"), GUINT_TO_POINTER (10), NULL,
			   _("MegaBytes"), GUINT_TO_POINTER (20), NULL,
			   _("GigaBytes"), GUINT_TO_POINTER (30), NULL,
			   NULL);

  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,
			      gulong            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 > (1 << shift) && value % (1 << shift) == 0)
        break;
    }

  if (shift != entry->shift)
    {
      entry->shift = shift;
      gimp_option_menu_set_history (GTK_OPTION_MENU (entry->menu),
				    GUINT_TO_POINTER (shift));
    }

  gtk_adjustment_set_value (entry->adjustment, value >> shift);
}

/**
 * gimp_memsize_entry_get_value:
 * @entry: a #GimpMemsizeEntry
 *
 * Retrieves the current value from a #GimpMemsizeEntry.
 *
 * Returns: the current value of @entry (in Bytes).
 **/
gulong
gimp_memsize_entry_get_value (GimpMemsizeEntry *entry)
{
  g_return_val_if_fail (GIMP_IS_MEMSIZE_ENTRY (entry), 0);
  
  return entry->value;
}


static void
gimp_memsize_entry_adj_callback (GtkAdjustment    *adj,
				 GimpMemsizeEntry *entry)
{
  gulong size;

  size = gtk_adjustment_get_value (adj);

  entry->value = size << entry->shift;

258
  g_signal_emit (entry, gimp_memsize_entry_signals[VALUE_CHANGED], 0);
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
}

static void
gimp_memsize_entry_unit_callback (GtkWidget        *widget,
				  GimpMemsizeEntry *entry)
{
  guint shift = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (widget),
						     "gimp-item-data"));

  if (shift != entry->shift)
    {
      entry->shift = shift;

      entry->adjustment->lower = entry->lower >> shift;
      entry->adjustment->upper = entry->upper >> shift;

      gtk_adjustment_changed (entry->adjustment);

      gtk_adjustment_set_value (GTK_ADJUSTMENT (entry->adjustment),
				entry->value >> shift);
    }
}