EpisodesStack: Implemnt the transition between empty and populated.

hammond-gtk/src/content.rs

@@ -173,15 +173,17 @@ impl EpisodeStack {
     }
 
     fn update(&self) {
-        // FIXME: figure out if it should switch to empty view
-        let vis = self.stack.get_visible_child_name().unwrap();
         let old = self.stack.get_child_by_name("episodes").unwrap();
-
         let eps = EpisodesView::new();
 
         self.stack.remove(&old);
         self.stack.add_named(&eps.container, "episodes");
-        self.stack.set_visible_child_name(&vis);
+
+        if eps.is_empty() {
+            self.stack.set_visible_child_name("empty");
+        } else {
+            self.stack.set_visible_child_name("episodes");
+        }
 
         old.destroy();
     }

hammond-gtk/src/views/episodes.rs

@@ -163,6 +163,34 @@ impl EpisodesView {
         view.container.show_all();
         Rc::new(view)
     }
+
+    pub fn is_empty(&self) -> bool {
+        if !self.today_list.get_children().is_empty() {
+            return false;
+        }
+
+        if !self.yday_list.get_children().is_empty() {
+            return false;
+        }
+
+        if !self.week_list.get_children().is_empty() {
+            return false;
+        }
+
+        if !self.month_list.get_children().is_empty() {
+            return false;
+        }
+
+        if !self.year_list.get_children().is_empty() {
+            return false;
+        }
+
+        if !self.rest_list.get_children().is_empty() {
+            return false;
+        }
+
+        true
+    }
 }
 
 // TODO: Avoid epoch calculations, use chrono instead.