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gimp/libgimp/gimpimagecombobox.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpimagecombobox.c
* Copyright (C) 2004 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 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
* Lesser 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
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gimp.h"
#include "gimpuitypes.h"
#include "gimpimagecombobox.h"
#include "gimppixbuf.h"
/**
* SECTION: gimpimagecombobox
* @title: GimpImageComboBox
* @short_description: A widget providing a popup menu of images.
*
* A widget providing a popup menu of images.
**/
#define THUMBNAIL_SIZE 24
#define WIDTH_REQUEST 200
typedef struct _GimpImageComboBoxClass GimpImageComboBoxClass;
struct _GimpImageComboBox
{
GimpIntComboBox parent_instance;
GimpImageConstraintFunc constraint;
gpointer data;
GDestroyNotify data_destroy;
};
struct _GimpImageComboBoxClass
{
GimpIntComboBoxClass parent_class;
};
static void gimp_image_combo_box_finalize (GObject *object);
static void gimp_image_combo_box_populate (GimpImageComboBox *combo_box);
static void gimp_image_combo_box_model_add (GtkListStore *store,
GList *images,
GimpImageConstraintFunc constraint,
gpointer data);
static void gimp_image_combo_box_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time);
static void gimp_image_combo_box_changed (GimpImageComboBox *combo_box);
static const GtkTargetEntry target = { "application/x-gimp-image-id", 0 };
G_DEFINE_TYPE (GimpImageComboBox, gimp_image_combo_box,
GIMP_TYPE_INT_COMBO_BOX)
#define parent_class gimp_image_combo_box_parent_class
static void
gimp_image_combo_box_class_init (GimpImageComboBoxClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = gimp_image_combo_box_finalize;
widget_class->drag_data_received = gimp_image_combo_box_drag_data_received;
}
static void
gimp_image_combo_box_init (GimpImageComboBox *combo_box)
{
gtk_drag_dest_set (GTK_WIDGET (combo_box),
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
&target, 1,
GDK_ACTION_COPY);
}
static void
gimp_image_combo_box_finalize (GObject *object)
{
GimpImageComboBox *combo = GIMP_IMAGE_COMBO_BOX (object);
if (combo->data_destroy)
combo->data_destroy (combo->data);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gimp_image_combo_box_new:
* @constraint: (nullable): A #GimpImageConstraintFunc or %NULL
* @data: (closure constraint): A pointer that is passed to @constraint
* @data_destroy: (destroy data): Destroy function for @data.
*
* Creates a new #GimpIntComboBox filled with all currently opened
* images. If a @constraint function is specified, it is called for
* each image and only if the function returns %TRUE, the image is
* added to the combobox.
*
* You should use gimp_int_combo_box_connect() to initialize and
* connect the combo. Use gimp_int_combo_box_set_active() to get the
* active image ID and gimp_int_combo_box_get_active() to retrieve the
* ID of the selected image.
*
* Returns: a new #GimpIntComboBox.
*
* Since: 2.2
**/
GtkWidget *
gimp_image_combo_box_new (GimpImageConstraintFunc constraint,
gpointer data,
GDestroyNotify data_destroy)
{
GimpImageComboBox *combo_box;
combo_box = g_object_new (GIMP_TYPE_IMAGE_COMBO_BOX,
"width-request", WIDTH_REQUEST,
"ellipsize", PANGO_ELLIPSIZE_MIDDLE,
NULL);
combo_box->constraint = constraint;
combo_box->data = data;
combo_box->data_destroy = data_destroy;
gimp_image_combo_box_populate (combo_box);
g_signal_connect (combo_box, "changed",
G_CALLBACK (gimp_image_combo_box_changed),
NULL);
return GTK_WIDGET (combo_box);
}
static void
gimp_image_combo_box_populate (GimpImageComboBox *combo_box)
{
GtkTreeModel *model;
GtkTreeIter iter;
GList *images;
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
images = gimp_list_images ();
gimp_image_combo_box_model_add (GTK_LIST_STORE (model), images,
combo_box->constraint,
combo_box->data);
g_list_free (images);
if (gtk_tree_model_get_iter_first (model, &iter))
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);
}
static void
gimp_image_combo_box_model_add (GtkListStore *store,
GList *images,
GimpImageConstraintFunc constraint,
gpointer data)
{
GtkTreeIter iter;
GList *list;
for (list = images; list; list = g_list_next (list))
{
GimpImage *image = list->data;
gint32 image_id = gimp_image_get_id (image);
if (! constraint || constraint (image, data))
{
gchar *image_name = gimp_image_get_name (image);
gchar *label;
GdkPixbuf *thumb;
label = g_strdup_printf ("%s-%d", image_name, image_id);
g_free (image_name);
thumb = gimp_image_get_thumbnail (image,
THUMBNAIL_SIZE, THUMBNAIL_SIZE,
GIMP_PIXBUF_SMALL_CHECKS);
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter,
GIMP_INT_STORE_VALUE, image_id,
GIMP_INT_STORE_LABEL, label,
GIMP_INT_STORE_PIXBUF, thumb,
-1);
if (thumb)
g_object_unref (thumb);
g_free (label);
}
}
}
static void
gimp_image_combo_box_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection,
guint info,
guint time)
{
gint length = gtk_selection_data_get_length (selection);
gchar *str;
if (gtk_selection_data_get_format (selection) != 8 || length < 1)
{
g_warning ("%s: received invalid image ID data", G_STRFUNC);
return;
}
str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection),
length);
if (g_utf8_validate (str, -1, NULL))
{
gint pid;
gint ID;
if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
pid == gimp_getpid ())
{
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (widget), ID);
}
}
g_free (str);
}
static void
gimp_image_combo_box_changed (GimpImageComboBox *combo_box)
{
gint image_ID;
if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo_box),
&image_ID))
{
if (! gimp_image_get_by_id (image_ID))
{
GtkTreeModel *model;
model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
g_signal_stop_emission_by_name (combo_box, "changed");
gtk_list_store_clear (GTK_LIST_STORE (model));
gimp_image_combo_box_populate (combo_box);
}
}
}
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