[gnome-photos] tracker-controller: Add "query-error" signal

[Debarshi Ray <debarshir src gnome org>]

commit 6513cb614391f79c207b5c61008a4a0684b4e1d3
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Nov 13 01:49:39 2012 +0100

    tracker-controller: Add "query-error" signal

 po/POTFILES.in                  |    1 +
 src/photos-marshalers.list      |    1 +
 src/photos-tracker-controller.c |   32 +++++++++++++++++++++++++++++---
 src/photos-tracker-controller.h |    1 +
 4 files changed, 32 insertions(+), 3 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 526d63c..07853d3 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -16,3 +16,4 @@ src/photos-search-type-manager.c
 src/photos-selection-toolbar.c
 src/photos-source-manager.c
 src/photos-spinner-box.c
+src/photos-tracker-controller.c
\ No newline at end of file
diff --git a/src/photos-marshalers.list b/src/photos-marshalers.list
index fad4924..a380f7a 100644
--- a/src/photos-marshalers.list
+++ b/src/photos-marshalers.list
@@ -1,2 +1,3 @@
+VOID:CHAR,CHAR
 VOID:ENUM,ENUM
 VOID:INT,INT
diff --git a/src/photos-tracker-controller.c b/src/photos-tracker-controller.c
index 3f052db..cda6429 100644
--- a/src/photos-tracker-controller.c
+++ b/src/photos-tracker-controller.c
@@ -26,8 +26,10 @@
 #include "config.h"
 
 #include <glib.h>
+#include <glib/gi18n.h>
 
 #include "photos-item-manager.h"
+#include "photos-marshalers.h"
 #include "photos-offset-controller.h"
 #include "photos-query-builder.h"
 #include "photos-source-manager.h"
@@ -52,6 +54,7 @@ struct _PhotosTrackerControllerPrivate
 
 enum
 {
+  QUERY_ERROR,
   QUERY_STATUS_CHANGED,
   LAST_SIGNAL
 };
@@ -73,6 +76,18 @@ static void photos_tracker_controller_set_query_status (PhotosTrackerController
 
 
 static void
+photos_tracker_controller_query_error (PhotosTrackerController *self, GError *error)
+{
+  const gchar *primary = _("Unable to fetch the list of photos");
+
+  if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+    return;
+
+  g_signal_emit (self, signals[QUERY_ERROR], 0, primary, error->message);
+}
+
+
+static void
 photos_tracker_controller_query_finished (PhotosTrackerController *self, GError *error)
 {
   PhotosTrackerControllerPrivate *priv = self->priv;
@@ -80,9 +95,7 @@ photos_tracker_controller_query_finished (PhotosTrackerController *self, GError
   photos_tracker_controller_set_query_status (self, FALSE);
 
   if (error != NULL)
-    {
-      /* TODO: print error */
-    }
+    photos_tracker_controller_query_error (self, error);
   else
     photos_offset_controller_reset_count (priv->offset_cntrlr);
 
@@ -333,6 +346,19 @@ photos_tracker_controller_class_init (PhotosTrackerControllerClass *class)
   object_class->dispose = photos_tracker_controller_dispose;
   object_class->finalize = photos_tracker_controller_finalize;
 
+  signals[QUERY_ERROR] = g_signal_new ("query-error",
+                                       G_TYPE_FROM_CLASS (class),
+                                       G_SIGNAL_RUN_LAST,
+                                       G_STRUCT_OFFSET (PhotosTrackerControllerClass,
+                                                        query_error),
+                                       NULL, /*accumulator */
+                                       NULL, /*accu_data */
+                                       _photos_marshal_VOID__CHAR_CHAR,
+                                       G_TYPE_NONE,
+                                       2,
+                                       G_TYPE_STRING,
+                                       G_TYPE_STRING);
+
   signals[QUERY_STATUS_CHANGED] = g_signal_new ("query-status-changed",
                                                 G_TYPE_FROM_CLASS (class),
                                                 G_SIGNAL_RUN_LAST,
diff --git a/src/photos-tracker-controller.h b/src/photos-tracker-controller.h
index b56ed02..1662899 100644
--- a/src/photos-tracker-controller.h
+++ b/src/photos-tracker-controller.h
@@ -65,6 +65,7 @@ struct _PhotosTrackerControllerClass
 {
   GObjectClass parent_class;
 
+  void (*query_error) (PhotosTrackerController *self, const gchar *primary, const gchar *secondary);
   void (*query_status_changed) (PhotosTrackerController *self, gboolean querying);
 };