[gnome-todo/wip/lists] storage-popover: update sensitivity of create button

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

commit 9fd40e3c1e8af64e737d4dfa257e21ac49e0eb34
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Jun 12 19:54:27 2015 -0300

    storage-popover: update sensitivity of create button

 data/ui/storage-popover.ui |    1 +
 src/gtd-storage-popover.c  |   18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/storage-popover.ui b/data/ui/storage-popover.ui
index 94ce75a..a0c80cf 100644
--- a/data/ui/storage-popover.ui
+++ b/data/ui/storage-popover.ui
@@ -72,6 +72,7 @@
                     <property name="can_focus">True</property>
                     <property name="hexpand">True</property>
                     <property name="width_chars">35</property>
+                    <signal name="notify::text" handler="gtd_storage_popover__text_changed_cb" 
object="GtdStoragePopover" swapped="yes" />
                   </object>
                   <packing>
                     <property name="expand">False</property>
diff --git a/src/gtd-storage-popover.c b/src/gtd-storage-popover.c
index af73453..ff24655 100644
--- a/src/gtd-storage-popover.c
+++ b/src/gtd-storage-popover.c
@@ -27,6 +27,7 @@ typedef struct
 {
   GtkWidget            *change_location_button;
   GtkWidget            *location_provider_image;
+  GtkWidget            *new_list_create_button;
   GtkWidget            *stack;
   GtkWidget            *storage_selector;
 
@@ -50,6 +51,21 @@ enum {
 };
 
 static void
+gtd_storage_popover__text_changed_cb (GtdStoragePopover *popover,
+                                      GParamSpec        *spec,
+                                      GtkEntry          *entry)
+{
+  GtdStoragePopoverPrivate *priv;
+
+  g_return_if_fail (GTD_IS_STORAGE_POPOVER (popover));
+  g_return_if_fail (GTK_IS_ENTRY (entry));
+
+  priv = popover->priv;
+
+  gtk_widget_set_sensitive (priv->new_list_create_button, gtk_entry_get_text_length (entry) > 0);
+}
+
+static void
 gtd_storage_popover__change_location_clicked (GtdStoragePopover *popover,
                                               GtkWidget         *button)
 {
@@ -190,11 +206,13 @@ gtd_storage_popover_class_init (GtdStoragePopoverClass *klass)
 
   gtk_widget_class_bind_template_child_private (widget_class, GtdStoragePopover, change_location_button);
   gtk_widget_class_bind_template_child_private (widget_class, GtdStoragePopover, location_provider_image);
+  gtk_widget_class_bind_template_child_private (widget_class, GtdStoragePopover, new_list_create_button);
   gtk_widget_class_bind_template_child_private (widget_class, GtdStoragePopover, stack);
   gtk_widget_class_bind_template_child_private (widget_class, GtdStoragePopover, storage_selector);
 
   gtk_widget_class_bind_template_callback (widget_class, gtd_storage_popover__change_location_clicked);
   gtk_widget_class_bind_template_callback (widget_class, gtd_storage_popover__storage_selected);
+  gtk_widget_class_bind_template_callback (widget_class, gtd_storage_popover__text_changed_cb);
 }
 
 static void