[gnome-news/wip/gbsneto/improvements: 6/6] feeds-view: update items when something changes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 20162f5e4814d553652334aefb8d311452b87be9
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Mar 5 20:04:59 2016 -0300

    feeds-view: update items when something changes
    
    If we read an item in the News view and directly jump
    into Feeds view, the item is not marked as read.
    
    Fix that by updating items when something changes on
    Tracker side.

 gnomenews/view.py |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/gnomenews/view.py b/gnomenews/view.py
index 46f6b7d..9761140 100644
--- a/gnomenews/view.py
+++ b/gnomenews/view.py
@@ -196,9 +196,20 @@ class FeedsView(GenericFeedsView):
         delete_channel_action = app.lookup_action('delete_channel')
         delete_channel_action.connect('activate', self.delete_channel)
 
+        self.tracker.connect('items-updated', self.update_items)
         self.tracker.connect('feeds-updated', self.update)
 
     @log
+    def update_items(self, _=None):
+        for flowbox in self.feed_stack.get_children():
+            url = self.feed_stack.child_get_property(flowbox, 'name')
+
+            [flowbox.remove(old_feed) for old_feed in flowbox.get_children()]
+
+            posts = self.tracker.get_posts_for_channel(url)
+            [self._add_a_new_preview(post, flowbox) for post in posts]
+
+    @log
     def update(self, _=None):
         new_feeds = self.tracker.get_channels()
         new_feed_urls = [new_feed['url'] for new_feed in new_feeds]