[gnome-todo/wip/selection-mode] window: update actionbar buttons' sensitivity

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

commit 5924ca0031fce2d2b8ac96248d4a7a7eea4ccedb
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Aug 22 06:51:29 2015 -0300

    window: update actionbar buttons' sensitivity
    
    When selection 1 task list, we can rename it. By
    selecting more, we can't.
    
    Also, the delete button is updated according to the
    kind of the task lists selected. If a system-protected
    task list is selected, it gets insensitive.

 src/gtd-window.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)
---
diff --git a/src/gtd-window.c b/src/gtd-window.c
index 370062a..f66757d 100644
--- a/src/gtd-window.c
+++ b/src/gtd-window.c
@@ -41,6 +41,8 @@ typedef struct
   GtkWidget                     *new_list_button;
   GtkWidget                     *new_list_popover;
   GtdNotificationWidget         *notification_widget;
+  GtkWidget                     *remove_button;
+  GtkWidget                     *rename_button;
   GtdTaskListView               *scheduled_list_view;
   GtkSearchBar                  *search_bar;
   GtkToggleButton               *search_button;
@@ -102,6 +104,39 @@ gtd_window__stack_visible_child_cb (GtdWindow *window)
 }
 
 static void
+update_action_bar_buttons (GtdWindow *window)
+{
+  GtdWindowPrivate *priv;
+  GList *children;
+  GList *l;
+  gboolean all_lists_removable;
+  gint selected_lists;
+
+  priv = window->priv;
+  children = gtk_container_get_children (GTK_CONTAINER (priv->lists_flowbox));
+  selected_lists = 0;
+  all_lists_removable = TRUE;
+
+  for (l = children; l != NULL; l = l->next)
+    {
+      GtdTaskList *list;
+
+      list = gtd_task_list_item_get_list (l->data);
+
+      if (gtd_task_list_item_get_selected (l->data))
+        {
+          selected_lists++;
+
+          if (!gtd_task_list_is_removable (list))
+            all_lists_removable = FALSE;
+        }
+    }
+
+  gtk_widget_set_sensitive (priv->remove_button, selected_lists > 0 && all_lists_removable);
+  gtk_widget_set_sensitive (priv->rename_button, selected_lists == 1);
+}
+
+static void
 gtd_window__select_button_toggled (GtkToggleButton *button,
                                    GtdWindow       *window)
 {
@@ -335,6 +370,7 @@ gtd_window__list_selected (GtkFlowBox      *flowbox,
     {
     case GTD_WINDOW_MODE_SELECTION:
       gtd_task_list_item_set_selected (item, !gtd_task_list_item_get_selected (item));
+      update_action_bar_buttons (GTD_WINDOW (user_data));
       break;
 
     case GTD_WINDOW_MODE_NORMAL:
@@ -592,6 +628,8 @@ gtd_window_class_init (GtdWindowClass *klass)
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, new_list_button);
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, new_list_popover);
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, notification_widget);
+  gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, remove_button);
+  gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, rename_button);
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, scheduled_list_view);
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, stack);
   gtk_widget_class_bind_template_child_private (widget_class, GtdWindow, search_bar);
@@ -743,6 +781,8 @@ gtd_window_set_mode (GtdWindow     *window,
           gtk_style_context_add_class (context, "selection-mode");
           gtk_header_bar_set_custom_title (priv->headerbar, NULL);
           gtk_header_bar_set_title (priv->headerbar, _("Click a task list to select"));
+
+          update_action_bar_buttons (window);
         }
       else
         {