GNOME.org
 

[gnome-photos] Add PhotosCollectionIconWatcher

commit ae75587d3c6cfdf023e709b049eeddf3aed1a627
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Apr 2 23:54:15 2013 +0200

    Add PhotosCollectionIconWatcher

 src/Makefile.am                      |    2 +
 src/photos-collection-icon-watcher.c |  443 ++++++++++++++++++++++++++++++++++
 src/photos-collection-icon-watcher.h |   84 +++++++
 src/photos-utils.c                   |   90 +++++++
 src/photos-utils.h                   |    2 +
 5 files changed, 621 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 026eaa8..b939d0d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -58,6 +58,8 @@ gnome_photos_SOURCES = \
        photos-base-manager.h \
        photos-base-item.c \
        photos-base-item.h \
+       photos-collection-icon-watcher.c \
+       photos-collection-icon-watcher.h \
        photos-collection-manager.c \
        photos-collection-manager.h \
        photos-create-collection-job.c \
diff --git a/src/photos-collection-icon-watcher.c b/src/photos-collection-icon-watcher.c
new file mode 100644
index 0000000..d11ff05
--- /dev/null
+++ b/src/photos-collection-icon-watcher.c
@@ -0,0 +1,443 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <glib.h>
+#include <tracker-sparql.h>
+
+#include "photos-collection-icon-watcher.h"
+#include "photos-item-manager.h"
+#include "photos-query.h"
+#include "photos-query-builder.h"
+#include "photos-single-item-job.h"
+#include "photos-tracker-queue.h"
+#include "photos-utils.h"
+
+
+struct _PhotosCollectionIconWatcherPrivate
+{
+  GHashTable *item_connections;
+  GList *items;
+  GList *urns;
+  PhotosBaseItem *collection;
+  PhotosBaseManager *item_mngr;
+  PhotosTrackerQueue *queue;
+  guint to_query_remaining;
+};
+
+enum
+{
+  PROP_0,
+  PROP_COLLECTION
+};
+
+enum
+{
+  ICON_UPDATED,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+
+G_DEFINE_TYPE (PhotosCollectionIconWatcher, photos_collection_icon_watcher, G_TYPE_OBJECT);
+
+
+static void
+photos_collection_icon_watcher_create_collection_icon (PhotosCollectionIconWatcher *self)
+{
+  GIcon *icon;
+  GList *icons = NULL;
+  GList *l;
+  gint size;
+
+  for (l = self->priv->items; l != NULL; l = l->next)
+    {
+      GdkPixbuf *pristine_icon;
+      PhotosBaseItem *item = PHOTOS_BASE_ITEM (l->data);
+
+      pristine_icon = photos_base_item_get_pristine_icon (item);
+      icons = g_list_prepend (icons, g_object_ref (pristine_icon));
+    }
+  icons = g_list_reverse (icons);
+
+  size = photos_utils_get_icon_size ();
+  icon = photos_utils_create_collection_icon (size, icons);
+
+  g_signal_emit (self, signals[ICON_UPDATED], 0, icon);
+
+  g_list_free_full (icons, g_object_unref);
+  g_clear_object (&icon);
+}
+
+
+static void
+photos_collection_icon_watcher_all_items_ready (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+  GList *l;
+
+  for (l = priv->items; l != NULL; l = l->next)
+    {
+      PhotosBaseItem *item = PHOTOS_BASE_ITEM (l->data);
+      gulong update_id;
+
+      update_id = g_signal_connect_swapped (item,
+                                            "info-updated",
+                                            G_CALLBACK 
(photos_collection_icon_watcher_create_collection_icon),
+                                            self);
+      g_hash_table_insert (priv->item_connections, GUINT_TO_POINTER ((guint) update_id), g_object_ref 
(item));
+    }
+
+  photos_collection_icon_watcher_create_collection_icon (self);
+}
+
+
+static void
+photos_collection_icon_watcher_clear (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+
+  g_hash_table_remove_all (priv->item_connections);
+
+  g_list_free_full (priv->urns, g_free);
+  priv->urns = NULL;
+
+  g_list_free_full (priv->items, g_object_unref);
+  priv->items = NULL;
+}
+
+
+static void
+photos_collection_icon_watcher_destroy (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+  GHashTableIter iter;
+  PhotosBaseItem *item;
+  gpointer key;
+
+  g_hash_table_iter_init (&iter, priv->item_connections);
+  while (g_hash_table_iter_next (&iter, (gpointer) &key, (gpointer) &item))
+    {
+      guint id = GPOINTER_TO_UINT (key);
+      g_signal_handler_disconnect (item, id);
+    }
+}
+
+
+static void
+photos_collection_icon_watcher_to_query_collector (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+
+  priv->to_query_remaining--;
+  if (priv->to_query_remaining == 0)
+    photos_collection_icon_watcher_all_items_ready (self);
+}
+
+
+static void
+photos_collection_icon_watcher_to_query_executed (TrackerSparqlCursor *cursor, gpointer user_data)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (user_data);
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+
+  if (cursor != NULL)
+    {
+      PhotosBaseItem *item;
+
+      item = photos_item_manager_create_item (PHOTOS_ITEM_MANAGER (priv->item_mngr), cursor);
+      priv->items = g_list_prepend (priv->items, item);
+    }
+
+  photos_collection_icon_watcher_to_query_collector (self);
+  g_object_unref (self);
+}
+
+
+static void
+photos_collection_icon_watcher_finished (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+  GList *l;
+  GList *to_query = NULL;
+
+  if (priv->urns == NULL)
+    return;
+
+  priv->to_query_remaining = 0;
+
+  for (l = priv->urns; l != NULL; l = l->next)
+    {
+      GObject *item;
+      const gchar *urn = (gchar *) l->data;
+
+      item = photos_base_manager_get_object_by_id (priv->item_mngr, urn);
+      if (item != NULL)
+        priv->items = g_list_prepend (priv->items, g_object_ref (item));
+      else
+        {
+          to_query = g_list_prepend (to_query, g_strdup (urn));
+          priv->to_query_remaining++;
+        }
+    }
+
+  if (priv->to_query_remaining == 0)
+    {
+      photos_collection_icon_watcher_all_items_ready (self);
+      return;
+    }
+
+  for (l = to_query; l != NULL; l = l->next)
+    {
+      PhotosSingleItemJob *job;
+      const gchar *urn = (gchar *) l->data;
+
+      job = photos_single_item_job_new (urn);
+      photos_single_item_job_run (job,
+                                  PHOTOS_QUERY_FLAGS_UNFILTERED,
+                                  photos_collection_icon_watcher_to_query_executed,
+                                  g_object_ref (self));
+      g_object_unref (job);
+    }
+
+  g_list_free_full (to_query, g_free);
+}
+
+
+static void
+photos_collection_icon_watcher_cursor_next (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (user_data);
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+  TrackerSparqlCursor *cursor = TRACKER_SPARQL_CURSOR (source_object);
+  GError *error;
+  gboolean valid;
+  gchar *urn;
+
+  error = NULL;
+  valid = tracker_sparql_cursor_next_finish (cursor, res, &error);
+  if (error != NULL)
+    {
+      g_warning ("Unable to query collection items: %s", error->message);
+      g_error_free (error);
+      goto end;
+    }
+  else if (!valid)
+    goto end;
+
+  urn = g_strdup (tracker_sparql_cursor_get_string (cursor, 0, NULL));
+  priv->urns = g_list_prepend (priv->urns, urn);
+
+  tracker_sparql_cursor_next_async (cursor,
+                                    NULL,
+                                    photos_collection_icon_watcher_cursor_next,
+                                    self);
+  return;
+
+ end:
+  priv->urns = g_list_reverse (priv->urns);
+  photos_collection_icon_watcher_finished (self);
+  tracker_sparql_cursor_close (cursor);
+  g_object_unref (self);
+}
+
+
+static void
+photos_collection_icon_watcher_query_executed (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (user_data);
+  TrackerSparqlConnection *connection = TRACKER_SPARQL_CONNECTION (source_object);
+  TrackerSparqlCursor *cursor;
+  GError *error;
+
+  error = NULL;
+  cursor = tracker_sparql_connection_query_finish (connection, res, &error);
+  if (error != NULL)
+    {
+      g_warning ("Unable to query collection items: %s", error->message);
+      g_error_free (error);
+      return;
+    }
+
+  tracker_sparql_cursor_next_async (cursor,
+                                    NULL,
+                                    photos_collection_icon_watcher_cursor_next,
+                                    g_object_ref (self));
+  g_object_unref (cursor);
+}
+
+
+static void
+photos_collection_icon_watcher_start (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+  PhotosQuery *query;
+  const gchar *id;
+
+  photos_collection_icon_watcher_clear (self);
+
+  id = photos_base_item_get_id (priv->collection);
+  query = photos_query_builder_collection_icon_query (id);
+  photos_tracker_queue_select (priv->queue,
+                               query->sparql,
+                               NULL,
+                               photos_collection_icon_watcher_query_executed,
+                               g_object_ref (self),
+                               g_object_unref);
+  photos_query_free (query);
+}
+
+
+static void
+photos_collection_icon_watcher_constructed (GObject *object)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (object);
+
+  G_OBJECT_CLASS (photos_collection_icon_watcher_parent_class)->constructed (object);
+  photos_collection_icon_watcher_start (self);
+}
+
+
+static void
+photos_collection_icon_watcher_dispose (GObject *object)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (object);
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+
+  if (priv->item_connections != NULL)
+    {
+      photos_collection_icon_watcher_destroy (self);
+      g_hash_table_unref (priv->item_connections);
+      priv->item_connections = NULL;
+    }
+
+  g_list_free_full (priv->items, g_object_unref);
+  priv->items = NULL;
+
+  g_clear_object (&priv->item_mngr);
+  g_clear_object (&priv->queue);
+
+  G_OBJECT_CLASS (photos_collection_icon_watcher_parent_class)->dispose (object);
+}
+
+
+static void
+photos_collection_icon_watcher_finalize (GObject *object)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (object);
+
+  g_list_free_full (self->priv->urns, g_free);
+
+  G_OBJECT_CLASS (photos_collection_icon_watcher_parent_class)->finalize (object);
+}
+
+
+static void
+photos_collection_icon_watcher_set_property (GObject *object,
+                                             guint prop_id,
+                                             const GValue *value,
+                                             GParamSpec *pspec)
+{
+  PhotosCollectionIconWatcher *self = PHOTOS_COLLECTION_ICON_WATCHER (object);
+
+  switch (prop_id)
+    {
+    case PROP_COLLECTION:
+      self->priv->collection = PHOTOS_BASE_ITEM (g_value_get_object (value)); /* self is owned by collection 
*/
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+photos_collection_icon_watcher_init (PhotosCollectionIconWatcher *self)
+{
+  PhotosCollectionIconWatcherPrivate *priv = self->priv;
+
+  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                            PHOTOS_TYPE_COLLECTION_ICON_WATCHER,
+                                            PhotosCollectionIconWatcherPrivate);
+  priv = self->priv;
+
+  priv->item_connections = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, g_object_unref);
+  priv->item_mngr = photos_item_manager_new ();
+  priv->queue = photos_tracker_queue_new ();
+}
+
+
+static void
+photos_collection_icon_watcher_class_init (PhotosCollectionIconWatcherClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->constructed = photos_collection_icon_watcher_constructed;
+  object_class->dispose = photos_collection_icon_watcher_dispose;
+  object_class->finalize = photos_collection_icon_watcher_finalize;
+  object_class->set_property = photos_collection_icon_watcher_set_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_COLLECTION,
+                                   g_param_spec_object ("collection",
+                                                        "PhotosBaseItem object",
+                                                        "The collection to watch.",
+                                                        PHOTOS_TYPE_BASE_ITEM,
+                                                        G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE));
+
+  signals[ICON_UPDATED] = g_signal_new ("icon-updated",
+                                        G_TYPE_FROM_CLASS (class),
+                                        G_SIGNAL_RUN_LAST,
+                                        G_STRUCT_OFFSET (PhotosCollectionIconWatcherClass,
+                                                         icon_updated),
+                                        NULL, /* accumulator */
+                                        NULL, /* accu_data */
+                                        g_cclosure_marshal_VOID__OBJECT,
+                                        G_TYPE_NONE,
+                                        1,
+                                        G_TYPE_ICON);
+
+  g_type_class_add_private (class, sizeof (PhotosCollectionIconWatcherPrivate));
+}
+
+
+PhotosCollectionIconWatcher *
+photos_collection_icon_watcher_new (PhotosBaseItem *collection)
+{
+  return g_object_new (PHOTOS_TYPE_COLLECTION_ICON_WATCHER, "collection", collection, NULL);
+}
+
+
+void
+photos_collection_icon_watcher_refresh (PhotosCollectionIconWatcher *self)
+{
+  photos_collection_icon_watcher_destroy (self);
+  photos_collection_icon_watcher_start (self);
+}
diff --git a/src/photos-collection-icon-watcher.h b/src/photos-collection-icon-watcher.h
new file mode 100644
index 0000000..e39edca
--- /dev/null
+++ b/src/photos-collection-icon-watcher.h
@@ -0,0 +1,84 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+#ifndef PHOTOS_COLLECTION_ICON_WATCHER_H
+#define PHOTOS_COLLECTION_ICON_WATCHER_H
+
+#include <gio/gio.h>
+
+#include "photos-base-item.h"
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_COLLECTION_ICON_WATCHER (photos_collection_icon_watcher_get_type ())
+
+#define PHOTOS_COLLECTION_ICON_WATCHER(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+   PHOTOS_TYPE_COLLECTION_ICON_WATCHER, PhotosCollectionIconWatcher))
+
+#define PHOTOS_COLLECTION_ICON_WATCHER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), \
+   PHOTOS_TYPE_COLLECTION_ICON_WATCHER, PhotosCollectionIconWatcherClass))
+
+#define PHOTOS_IS_COLLECTION_ICON_WATCHER(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+   PHOTOS_TYPE_COLLECTION_ICON_WATCHER))
+
+#define PHOTOS_IS_COLLECTION_ICON_WATCHER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), \
+   PHOTOS_TYPE_COLLECTION_ICON_WATCHER))
+
+#define PHOTOS_COLLECTION_ICON_WATCHER_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), \
+   PHOTOS_TYPE_COLLECTION_ICON_WATCHER, PhotosCollectionIconWatcherClass))
+
+typedef void (*PhotosCollectionIconWatcherCallback) (TrackerSparqlCursor *, gpointer);
+
+typedef struct _PhotosCollectionIconWatcher        PhotosCollectionIconWatcher;
+typedef struct _PhotosCollectionIconWatcherClass   PhotosCollectionIconWatcherClass;
+typedef struct _PhotosCollectionIconWatcherPrivate PhotosCollectionIconWatcherPrivate;
+
+struct _PhotosCollectionIconWatcher
+{
+  GObject parent_instance;
+  PhotosCollectionIconWatcherPrivate *priv;
+};
+
+struct _PhotosCollectionIconWatcherClass
+{
+  GObjectClass parent_class;
+
+  /* signals */
+  void (*icon_updated) (PhotosCollectionIconWatcher *self, GIcon *icon);
+};
+
+GType                         photos_collection_icon_watcher_get_type    (void) G_GNUC_CONST;
+
+PhotosCollectionIconWatcher  *photos_collection_icon_watcher_new         (PhotosBaseItem *collection);
+
+void                          photos_collection_icon_watcher_refresh     (PhotosCollectionIconWatcher *self);
+
+G_END_DECLS
+
+#endif /* PHOTOS_COLLECTION_ICON_WATCHER_H */
diff --git a/src/photos-utils.c b/src/photos-utils.c
index f6256f1..5ac0574 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -41,6 +41,96 @@
 static const gchar *dot_dir;
 
 
+GIcon *
+photos_utils_create_collection_icon (gint base_size, GList *pixbufs)
+{
+  cairo_surface_t *surface;
+  cairo_t *cr;
+  GdkPixbuf *pix;
+  GIcon *ret_val;
+  GList *l;
+  GtkStyleContext *context;
+  GtkWidgetPath *path;
+  gint cur_x;
+  gint cur_y;
+  gint idx;
+  gint padding;
+  gint pix_height;
+  gint pix_width;
+  gint scale_size;
+  gint tile_size;
+
+  /* TODO: do not hardcode 4, but scale to another layout if more
+   * pixbufs are provided.
+   */
+
+  padding = MAX (floor (base_size / 10), 4);
+  tile_size = (base_size - (3 * padding)) / 2;
+
+  context = gtk_style_context_new ();
+  gtk_style_context_add_class (context, "documents-collection-icon");
+
+  path = gtk_widget_path_new ();
+  gtk_widget_path_append_type (path, GTK_TYPE_ICON_VIEW);
+  gtk_style_context_set_path (context, path);
+  gtk_widget_path_unref (path);
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, base_size, base_size);
+  cr = cairo_create (surface);
+
+  gtk_render_background (context, cr, 0, 0, base_size, base_size);
+
+  l = pixbufs;
+  idx = 0;
+  cur_x = padding;
+  cur_y = padding;
+
+  while (l != NULL && idx < 4)
+    {
+      pix = l->data;
+      pix_width = gdk_pixbuf_get_width (pix);
+      pix_height = gdk_pixbuf_get_height (pix);
+
+      scale_size = MIN (pix_width, pix_height);
+
+      cairo_save (cr);
+
+      cairo_translate (cr, cur_x, cur_y);
+
+      cairo_rectangle (cr, 0, 0,
+                       tile_size, tile_size);
+      cairo_clip (cr);
+
+      cairo_scale (cr, (gdouble) tile_size / (gdouble) scale_size, (gdouble) tile_size / (gdouble) 
scale_size);
+      gdk_cairo_set_source_pixbuf (cr, pix, 0, 0);
+
+      cairo_paint (cr);
+      cairo_restore (cr);
+
+      if ((idx % 2) == 0)
+        {
+          cur_x += tile_size + padding;
+        }
+      else
+        {
+          cur_x = padding;
+          cur_y += tile_size + padding;
+        }
+
+      idx++;
+      l = l->next;
+    }
+
+  ret_val = G_ICON (gdk_pixbuf_get_from_surface (surface, 0, 0, base_size, base_size));
+
+  cairo_surface_destroy (surface);
+  cairo_destroy (cr);
+  g_object_unref (context);
+
+  return ret_val;
+}
+
+
 GdkPixbuf *
 photos_utils_create_pixbuf_from_node (GeglNode *node)
 {
diff --git a/src/photos-utils.h b/src/photos-utils.h
index 2982074..89ef9cb 100644
--- a/src/photos-utils.h
+++ b/src/photos-utils.h
@@ -34,6 +34,8 @@
 
 G_BEGIN_DECLS
 
+GIcon           *photos_utils_create_collection_icon      (gint base_size, GList *pixbufs);
+
 GdkPixbuf       *photos_utils_create_pixbuf_from_node     (GeglNode *node);
 
 GIcon           *photos_utils_create_symbolic_icon        (const gchar *name, gint base_size);
[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]