[gnome-news] toolbar: show a spinner while adding the feed

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

commit 42787d1f7c42054340edb33363d739b3ed913902
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Nov 7 09:52:45 2016 -0200

    toolbar: show a spinner while adding the feed

 data/ui/headerbar.ui |   35 +++++++++++++++++++++++++++++------
 gnomenews/toolbar.py |   11 ++++++++++-
 2 files changed, 39 insertions(+), 7 deletions(-)
---
diff --git a/data/ui/headerbar.ui b/data/ui/headerbar.ui
index dc66419..1324ed8 100644
--- a/data/ui/headerbar.ui
+++ b/data/ui/headerbar.ui
@@ -41,14 +41,37 @@
               </object>
             </child>
             <child>
-              <object class="GtkButton" id="add-button">
+              <object class="GtkStack" id="add-button-stack">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="sensitive">False</property>
-                <property name="label" translatable="yes">Add</property>
-                <style>
-                  <class name="suggested-action"/>
-                </style>
+                <property name="vhomogeneous">True</property>
+                <property name="interpolate_size">True</property>
+                <child>
+                  <object class="GtkButton" id="add-button">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="sensitive">False</property>
+                    <property name="label" translatable="yes">Add</property>
+                    <style>
+                      <class name="suggested-action"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="name">button</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkSpinner">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="active">True</property>
+                    <property name="valign">center</property>
+                    <property name="halign">start</property>
+                  </object>
+                  <packing>
+                    <property name="name">spinner</property>
+                  </packing>
+                </child>
               </object>
             </child>
           </object>
diff --git a/gnomenews/toolbar.py b/gnomenews/toolbar.py
index bb2c760..7624660 100644
--- a/gnomenews/toolbar.py
+++ b/gnomenews/toolbar.py
@@ -54,6 +54,8 @@ class Toolbar(GObject.GObject):
         self.add_popover.hide()
         self.add_toggle_button.set_popover(self.add_popover)
 
+        self.button_stack = self._ui.get_object('add-button-stack')
+
         self.new_url = self._ui.get_object('new-url')
         self.new_url.connect('changed', self.on_new_url_changed)
         self.add_button = self._ui.get_object('add-button')
@@ -148,7 +150,14 @@ class Toolbar(GObject.GObject):
     @log
     def _add_new_feed(self, button):
         new_url = self.new_url.get_text()
-        self.window.tracker.add_channel(new_url)
+        self.window.tracker.add_channel(new_url, 30, None, self._channel_added)
+        self.button_stack.set_visible_child_name('spinner')
+        self.new_url.set_sensitive(False)
+
+    @log
+    def _channel_added(self, user_data=None):
+        self.button_stack.set_visible_child_name('button')
+        self.new_url.set_sensitive(True)
         self.new_url.set_text('')
         self.add_popover.hide()