EpisodesView: Retain vertical scrolling adjustment upon view refresh.

hammond-gtk/resources/gtk/episodes_view.ui

@@ -3,11 +3,13 @@
 <interface>
   <requires lib="gtk+" version="3.20"/>
   <object class="GtkBox" id="container">
+    <property name="name">container</property>
     <property name="visible">True</property>
     <property name="can_focus">False</property>
     <property name="orientation">vertical</property>
     <child>
-      <object class="GtkScrolledWindow">
+      <object class="GtkScrolledWindow" id="scrolled_window">
+        <property name="name">scrolled_window</property>
         <property name="visible">True</property>
         <property name="can_focus">True</property>
         <property name="shadow_type">in</property>

hammond-gtk/src/app.rs

@@ -134,12 +134,8 @@ impl App {
                         utils::refresh_feed(headerbar.clone(), Some(vec![s]), sender.clone())
                     }
                 }
-                Ok(Action::RefreshViews) => {
-                    content.update();
-                }
-                Ok(Action::RefreshEpisodesViewBGR) => {
-                    content.update_episode_view_if_baground();
-                }
+                Ok(Action::RefreshViews) => content.update(),
+                Ok(Action::RefreshEpisodesViewBGR) => content.update_episode_view_if_baground(),
                 Ok(Action::HeaderBarShowTile(title)) => headerbar.switch_to_back(&title),
                 Ok(Action::HeaderBarNormal) => headerbar.switch_to_normal(),
                 Ok(Action::HeaderBarHideUpdateIndicator) => headerbar.hide_update_notification(),

hammond-gtk/src/content.rs

@@ -193,8 +193,27 @@ impl EpisodeStack {
     }
 
     pub fn update(&self) {
-        let old = self.stack.get_child_by_name("episodes").unwrap();
+        use gtk::Cast;
+
+        let old = self.stack
+            .get_child_by_name("episodes")
+            .unwrap()
+            .downcast::<gtk::Box>()
+            .unwrap();
+        info!("Name: {:?}", WidgetExt::get_name(&old));
+
+        let scrolled_window = old.get_children()
+            .first()
+            .unwrap()
+            .clone()
+            .downcast::<gtk::ScrolledWindow>()
+            .unwrap();
+        info!("Name: {:?}", WidgetExt::get_name(&scrolled_window));
+
         let eps = EpisodesView::new(self.sender.clone());
+        scrolled_window
+            .get_vadjustment()
+            .map(|x| eps.set_vadjustment(&x));
 
         self.stack.remove(&old);
         self.stack.add_named(&eps.container, "episodes");

hammond-gtk/src/views/episodes.rs

@@ -24,6 +24,7 @@ enum ListSplit {
 #[derive(Debug, Clone)]
 pub struct EpisodesView {
     pub container: gtk::Box,
+    scrolled_window: gtk::ScrolledWindow,
     frame_parent: gtk::Box,
     today_box: gtk::Box,
     yday_box: gtk::Box,
@@ -41,6 +42,7 @@ impl Default for EpisodesView {
     fn default() -> Self {
         let builder = gtk::Builder::new_from_resource("/org/gnome/hammond/gtk/episodes_view.ui");
         let container: gtk::Box = builder.get_object("container").unwrap();
+        let scrolled_window: gtk::ScrolledWindow = builder.get_object("scrolled_window").unwrap();
         let frame_parent: gtk::Box = builder.get_object("frame_parent").unwrap();
         let today_box: gtk::Box = builder.get_object("today_box").unwrap();
         let yday_box: gtk::Box = builder.get_object("yday_box").unwrap();
@@ -55,6 +57,7 @@ impl Default for EpisodesView {
 
         EpisodesView {
             container,
+            scrolled_window,
             frame_parent,
             today_box,
             yday_box,
@@ -147,6 +150,10 @@ impl EpisodesView {
 
         true
     }
+
+    pub fn set_vadjustment(&self, vadjustment: &gtk::Adjustment) {
+        self.scrolled_window.set_vadjustment(vadjustment)
+    }
 }
 
 fn split(now: &DateTime<Utc>, epoch: i64) -> ListSplit {