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gimp/app/display/gimpscalecombobox.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpscalecombobox.c
* Copyright (C) 2004 Sven Neumann <sven@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; 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 "display-types.h"
#include "gimpscalecombobox.h"
#define MAX_ITEMS 10
enum
{
SCALE,
LABEL,
PERSISTENT,
NUM_COLUMNS
};
static void gimp_scale_combo_box_class_init (GimpScaleComboBoxClass *klass);
static void gimp_scale_combo_box_init (GimpScaleComboBox *combo_box);
static void gimp_scale_combo_box_finalize (GObject *object);
static GtkComboBoxClass *parent_class = NULL;
GType
gimp_scale_combo_box_get_type (void)
{
static GType combo_box_type = 0;
if (!combo_box_type)
{
static const GTypeInfo combo_box_info =
{
sizeof (GimpScaleComboBoxClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_scale_combo_box_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpScaleComboBox),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_scale_combo_box_init
};
combo_box_type = g_type_register_static (GTK_TYPE_COMBO_BOX,
"GimpScaleComboBox",
&combo_box_info, 0);
}
return combo_box_type;
}
static void
gimp_scale_combo_box_class_init (GimpScaleComboBoxClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_scale_combo_box_finalize;
}
static void
gimp_scale_combo_box_init (GimpScaleComboBox *combo_box)
{
GtkListStore *store;
GtkCellRenderer *cell;
GtkTreeIter iter;
gint i;
store = gtk_list_store_new (NUM_COLUMNS,
G_TYPE_DOUBLE,
G_TYPE_STRING,
G_TYPE_BOOLEAN);
gtk_combo_box_set_model (GTK_COMBO_BOX (combo_box), GTK_TREE_MODEL (store));
g_object_unref (store);
cell = g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
"xalign", 1.0,
NULL);
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo_box), cell, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo_box), cell,
"text", LABEL,
NULL);
for (i = 8; i > 0; i /= 2)
{
gchar label[32];
g_snprintf (label, sizeof (label), "%d%%", i * 100);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
SCALE, (gdouble) i,
LABEL, label,
PERSISTENT, TRUE,
-1);
}
for (i = 2; i <= 8; i *= 2)
{
gchar label[32];
g_snprintf (label, sizeof (label), "%d%%", 100 / i);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
SCALE, 1.0 / (gdouble) i,
LABEL, label,
PERSISTENT, TRUE,
-1);
}
}
static void
gimp_scale_combo_box_finalize (GObject *object)
{
GimpScaleComboBox *combo_box = GIMP_SCALE_COMBO_BOX (object);
if (combo_box->mru)
{
g_list_foreach (combo_box->mru,
(GFunc) gtk_tree_row_reference_free, NULL);
g_list_free (combo_box->mru);
combo_box->mru = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_scale_combo_box_mru_add (GimpScaleComboBox *combo_box,
GtkTreeIter *iter)
{
GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
GtkTreePath *path = gtk_tree_model_get_path (model, iter);
GList *list;
gboolean found;
for (list = combo_box->mru, found = FALSE; list && !found; list = list->next)
{
GtkTreePath *this = gtk_tree_row_reference_get_path (list->data);
if (gtk_tree_path_compare (this, path) == 0)
{
if (list->prev)
{
combo_box->mru = g_list_remove_link (combo_box->mru, list);
combo_box->mru = g_list_concat (list, combo_box->mru);
}
found = TRUE;
}
gtk_tree_path_free (this);
}
if (! found)
combo_box->mru = g_list_prepend (combo_box->mru,
gtk_tree_row_reference_new (model, path));
gtk_tree_path_free (path);
}
static void
gimp_scale_combo_box_mru_remove_last (GimpScaleComboBox *combo_box)
{
GtkTreeModel *model;
GtkTreePath *path;
GList *last;
GtkTreeIter iter;
if (! combo_box->mru)
return;
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
last = g_list_last (combo_box->mru);
path = gtk_tree_row_reference_get_path (last->data);
if (gtk_tree_model_get_iter (model, &iter, path))
{
gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
gtk_tree_row_reference_free (last->data);
combo_box->mru = g_list_delete_link (combo_box->mru, last);
}
gtk_tree_path_free (path);
}
/**
* gimp_scale_combo_box_new:
*
* Return value: a new #GimpScaleComboBox.
**/
GtkWidget *
gimp_scale_combo_box_new (void)
{
return g_object_new (GIMP_TYPE_SCALE_COMBO_BOX, NULL);
}
void
gimp_scale_combo_box_set_scale (GimpScaleComboBox *combo_box,
gdouble scale)
{
GtkTreeModel *model;
GtkListStore *store;
GtkTreeIter iter;
gboolean iter_valid;
gboolean persistent;
g_return_if_fail (GIMP_IS_SCALE_COMBO_BOX (combo_box));
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
store = GTK_LIST_STORE (model);
for (iter_valid = gtk_tree_model_get_iter_first (model, &iter);
iter_valid;
iter_valid = gtk_tree_model_iter_next (model, &iter))
{
gdouble this;
gtk_tree_model_get (model, &iter,
SCALE, &this,
-1);
if (this == scale)
break;
}
if (! iter_valid)
{
GtkTreeIter sibling;
gchar label[32];
for (iter_valid = gtk_tree_model_get_iter_first (model, &sibling);
iter_valid;
iter_valid = gtk_tree_model_iter_next (model, &sibling))
{
gdouble this;
gtk_tree_model_get (model, &sibling,
SCALE, &this,
-1);
if (this < scale)
break;
}
g_snprintf (label, sizeof (label), "%d%%", (gint) (100.0 * scale));
gtk_list_store_insert_before (store, &iter,
iter_valid ? &sibling : NULL);
gtk_list_store_set (store, &iter,
SCALE, scale,
LABEL, label,
PERSISTENT, FALSE,
-1);
}
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);
gtk_tree_model_get (model, &iter,
PERSISTENT, &persistent,
-1);
if (! persistent)
{
gimp_scale_combo_box_mru_add (combo_box, &iter);
if (gtk_tree_model_iter_n_children (model, NULL) > MAX_ITEMS)
gimp_scale_combo_box_mru_remove_last (combo_box);
}
}
gdouble
gimp_scale_combo_box_get_scale (GimpScaleComboBox *combo_box)
{
GtkTreeIter iter;
gdouble scale = 1.0;
g_return_val_if_fail (GIMP_IS_SCALE_COMBO_BOX (combo_box), FALSE);
if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo_box), &iter))
{
gtk_tree_model_get (gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box)),
&iter,
SCALE, &scale,
-1);
}
return scale;
}
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