[gnome-todo] task-row: add a strike-through on complete tasks

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

commit e3f7a7c27d3c5a1b9496bc44b2162fb5e1781275
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Oct 8 17:33:58 2016 -0300

    task-row: add a strike-through on complete tasks

 data/theme/Adwaita.css |    4 ++++
 src/gtd-task-row.c     |   21 +++++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/data/theme/Adwaita.css b/data/theme/Adwaita.css
index dfcf186..3b45d67 100644
--- a/data/theme/Adwaita.css
+++ b/data/theme/Adwaita.css
@@ -99,6 +99,10 @@ taskrow.priority-hight:hover {
     background-color: alpha(#cc0000, 0.4);
 }
 
+taskrow.complete label {
+    text-decoration-line: line-through;
+}
+
 /* extension list */
 list.extension-list row {
     border-bottom: solid 1px @borders
diff --git a/src/gtd-task-row.c b/src/gtd-task-row.c
index 490eb6a..0870ab9 100644
--- a/src/gtd-task-row.c
+++ b/src/gtd-task-row.c
@@ -112,6 +112,21 @@ gtd_task_row__priority_changed_cb (GtdTaskRow *row,
   gtk_widget_queue_draw (GTK_WIDGET (row));
 }
 
+static void
+complete_changed_cb (GtdTaskRow *self,
+                     GParamSpec *pspec,
+                     GtdTask    *task)
+{
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (self));
+
+  if (gtd_task_get_complete (task))
+    gtk_style_context_add_class (context, "complete");
+  else
+    gtk_style_context_remove_class (context, "complete");
+}
+
 static gboolean
 gtd_task_row__date_changed_binding (GBinding     *binding,
                                     const GValue *from_value,
@@ -614,6 +629,12 @@ gtd_task_row_set_task (GtdTaskRow *row,
                                     "notify::priority",
                                     G_CALLBACK (gtd_task_row__priority_changed_cb),
                                     row);
+
+          complete_changed_cb (row, NULL, task);
+          g_signal_connect_swapped (task,
+                                    "notify::complete",
+                                    G_CALLBACK (complete_changed_cb),
+                                    row);
         }
 
       g_object_notify (G_OBJECT (row), "task");