[gnome-control-center] online-accounts: Add an offline message label

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

commit 1e580c679b8b61d089531b814ec8ecbdccf8128a
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Nov 10 14:56:27 2016 -0200

    online-accounts: Add an offline message label
    
    When offline, we currently block the new accounts listbox
    so that users can't add new accounts. There is, however,
    no visual indication that we're offline, besides the listbox.
    
    Fix that by adding a descriptive label that's only visible
    when offline.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774222

 panels/online-accounts/cc-online-accounts-panel.c |    8 +++++++-
 panels/online-accounts/online-accounts.ui         |    8 ++++++++
 2 files changed, 15 insertions(+), 1 deletions(-)
---
diff --git a/panels/online-accounts/cc-online-accounts-panel.c 
b/panels/online-accounts/cc-online-accounts-panel.c
index 4a2b40e..f9759d0 100644
--- a/panels/online-accounts/cc-online-accounts-panel.c
+++ b/panels/online-accounts/cc-online-accounts-panel.c
@@ -49,6 +49,7 @@ struct _CcGoaPanel
   GtkWidget *new_account_vbox;
   GtkWidget *notification_label;
   GtkWidget *notification_revealer;
+  GtkWidget *offline_label;
   GtkWidget *providers_listbox;
   GtkWidget *remove_account_button;
   GtkWidget *stack;
@@ -421,6 +422,10 @@ cc_goa_panel_init (CcGoaPanel *panel)
   monitor = g_network_monitor_get_default();
 
   g_object_bind_property (monitor, "network-available",
+                          panel->offline_label, "visible",
+                          G_BINDING_SYNC_CREATE | G_BINDING_INVERT_BOOLEAN);
+
+  g_object_bind_property (monitor, "network-available",
                           panel->providers_listbox, "sensitive",
                           G_BINDING_SYNC_CREATE);
 
@@ -454,7 +459,7 @@ cc_goa_panel_init (CcGoaPanel *panel)
   fill_accounts_listbox (panel);
   goa_provider_get_all (get_all_providers_cb, panel);
 
-  gtk_widget_show_all (GTK_WIDGET (panel));
+  gtk_widget_show (GTK_WIDGET (panel));
 }
 
 static const char *
@@ -502,6 +507,7 @@ cc_goa_panel_class_init (CcGoaPanelClass *klass)
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, new_account_vbox);
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, notification_label);
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, notification_revealer);
+  gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, offline_label);
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, providers_listbox);
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, remove_account_button);
   gtk_widget_class_bind_template_child (widget_class, CcGoaPanel, stack);
diff --git a/panels/online-accounts/online-accounts.ui b/panels/online-accounts/online-accounts.ui
index 97a2d1f..fa6f27b 100644
--- a/panels/online-accounts/online-accounts.ui
+++ b/panels/online-accounts/online-accounts.ui
@@ -92,6 +92,14 @@
                   </object>
                 </child>
                 <child>
+                  <object class="GtkLabel" id="offline_label">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="wrap">True</property>
+                    <property name="label" translatable="yes">No internet connection — connect to setup new 
online accounts</property>
+                  </object>
+                </child>
+                <child>
                   <object class="GtkFrame" id="accounts_frame">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>