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Diffstat (limited to 'libgimp/gimpimagecombobox.c')
| -rw-r--r-- | libgimp/gimpimagecombobox.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/libgimp/gimpimagecombobox.c b/libgimp/gimpimagecombobox.c new file mode 100644 index 0000000..99aee7e --- /dev/null +++ b/libgimp/gimpimagecombobox.c @@ -0,0 +1,272 @@ +/* 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; +}; + +struct _GimpImageComboBoxClass +{ + GimpIntComboBoxClass parent_class; +}; + + +static void gimp_image_combo_box_populate (GimpImageComboBox *combo_box); +static void gimp_image_combo_box_model_add (GtkListStore *store, + gint num_images, + gint32 *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) + + +static void +gimp_image_combo_box_class_init (GimpImageComboBoxClass *klass) +{ + GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); + + 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); +} + +/** + * gimp_image_combo_box_new: + * @constraint: a #GimpImageConstraintFunc or %NULL + * @data: a pointer that is passed to @constraint + * + * 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. + * + * Return value: a new #GimpIntComboBox. + * + * Since: 2.2 + **/ +GtkWidget * +gimp_image_combo_box_new (GimpImageConstraintFunc constraint, + gpointer data) +{ + 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; + + 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; + gint32 *images; + gint num_images; + + model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box)); + + images = gimp_image_list (&num_images); + + gimp_image_combo_box_model_add (GTK_LIST_STORE (model), + num_images, images, + combo_box->constraint, + combo_box->data); + + g_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, + gint num_images, + gint32 *images, + GimpImageConstraintFunc constraint, + gpointer data) +{ + GtkTreeIter iter; + gint i; + + for (i = 0; i < num_images; i++) + { + if (! constraint || (* constraint) (images[i], data)) + { + gchar *image_name = gimp_image_get_name (images[i]); + gchar *label; + GdkPixbuf *thumb; + + label = g_strdup_printf ("%s-%d", image_name, images[i]); + + g_free (image_name); + + thumb = gimp_image_get_thumbnail (images[i], + THUMBNAIL_SIZE, THUMBNAIL_SIZE, + GIMP_PIXBUF_SMALL_CHECKS); + + gtk_list_store_append (store, &iter); + gtk_list_store_set (store, &iter, + GIMP_INT_STORE_VALUE, images[i], + 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_is_valid (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); + } + } +} |