Gtk: Abstract a BaseView Widget

Currently it just re-exports its children with getters,
but the idea is that it will also be able to handle
the saving the state of its height adjustment later.

podcasts-gtk/src/stacks/populated.rs

@@ -39,7 +39,7 @@ impl PopulatedStack {
         let container = gtk::Box::new(gtk::Orientation::Horizontal, 0);
 
         stack.add_named(&populated.container, "shows");
-        stack.add_named(&show.container, "widget");
+        stack.add_named(show.container(), "widget");
         container.add(&stack);
         container.show_all();
 
@@ -88,7 +88,7 @@ impl PopulatedStack {
     }
 
     pub(crate) fn replace_widget(&mut self, pd: Arc<Show>) -> Result<(), Error> {
-        let old = self.show.container.clone();
+        let old = self.show.container().clone();
 
         // save the ShowWidget vertical scrollbar alignment
         self.show.show_id().map(|id| self.show.save_vadjustment(id));
@@ -96,7 +96,7 @@ impl PopulatedStack {
         let new = ShowWidget::new(pd, self.sender.clone());
         self.show = new;
         self.stack.remove(&old);
-        self.stack.add_named(&self.show.container, "widget");
+        self.stack.add_named(self.show.container(), "widget");
 
         // The current visible child might change depending on
         // removal and insertion in the gtk::Stack, so we have
@@ -108,7 +108,7 @@ impl PopulatedStack {
     }
 
     pub(crate) fn update_widget(&mut self) -> Result<(), Error> {
-        let old = self.show.container.clone();
+        let old = self.show.container().clone();
         let id = self.show.show_id();
         if id.is_none() {
             return Ok(());

podcasts-gtk/src/widgets/base_view.rs

@@ -0,0 +1,35 @@
+use gtk::{self, prelude::*, Orientation};
+
+#[derive(Debug, Clone)]
+pub(crate) struct BaseView {
+    container: gtk::Box,
+    scrolled_window: gtk::ScrolledWindow,
+}
+
+impl Default for BaseView {
+    fn default() -> Self {
+        let container = gtk::Box::new(Orientation::Horizontal, 0);
+        let scrolled_window = gtk::ScrolledWindow::new(None, None);
+        container.add(&scrolled_window);
+        container.show_all();
+
+        BaseView {
+            container,
+            scrolled_window,
+        }
+    }
+}
+
+impl BaseView {
+    pub(crate) fn container(&self) -> &gtk::Box {
+        &self.container
+    }
+
+    pub(crate) fn scrolled_window(&self) -> &gtk::ScrolledWindow {
+        &self.scrolled_window
+    }
+
+    pub(crate) fn add<T: IsA<gtk::Widget>>(&self, widget: &T) {
+        self.scrolled_window.add(widget);
+    }
+}

podcasts-gtk/src/widgets/mod.rs

@@ -1,5 +1,6 @@
 mod aboutdialog;
 pub(crate) mod appnotif;
+mod base_view;
 mod empty;
 mod episode;
 mod home_view;
@@ -9,6 +10,7 @@ pub(crate) mod show_menu;
 mod shows_view;
 
 pub(crate) use self::aboutdialog::about_dialog;
+pub(crate) use self::base_view::BaseView;
 pub(crate) use self::empty::EmptyView;
 pub(crate) use self::episode::EpisodeWidget;
 pub(crate) use self::home_view::HomeView;

podcasts-gtk/src/widgets/show.rs

@@ -1,5 +1,5 @@
 use glib;
-use gtk::{self, prelude::*, Orientation, SelectionMode};
+use gtk::{self, prelude::*, SelectionMode};
 
 use crossbeam_channel::Sender;
 use failure::Error;
@@ -13,7 +13,7 @@ use podcasts_data::Show;
 
 use app::Action;
 use utils::{self, lazy_load};
-use widgets::{EpisodeWidget, ShowMenu};
+use widgets::{BaseView, EpisodeWidget, ShowMenu};
 
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
@@ -25,8 +25,7 @@ lazy_static! {
 
 #[derive(Debug, Clone)]
 pub(crate) struct ShowWidget {
-    pub(crate) container: gtk::Box,
+    view: BaseView,
-    scrolled_window: gtk::ScrolledWindow,
     cover: gtk::Image,
     description: gtk::Label,
     episodes: gtk::ListBox,
@@ -35,14 +34,11 @@ pub(crate) struct ShowWidget {
 
 impl Default for ShowWidget {
     fn default() -> Self {
-        let container = gtk::Box::new(Orientation::Horizontal, 0);
-        let scrolled_window = gtk::ScrolledWindow::new(None, None);
-        container.add(&scrolled_window);
-
         let builder = gtk::Builder::new_from_resource("/org/gnome/Podcasts/gtk/show_widget.ui");
         let sub_cont: gtk::Box = builder.get_object("sub_container").unwrap();
         let cover: gtk::Image = builder.get_object("cover").unwrap();
         let description: gtk::Label = builder.get_object("description").unwrap();
+        let view = BaseView::default();
 
         let frame = gtk::Frame::new(None);
         let episodes = gtk::ListBox::new();
@@ -58,12 +54,11 @@ impl Default for ShowWidget {
         frame.add(&episodes);
         sub_cont.add(&frame);
         column.add(&sub_cont);
-        scrolled_window.add(&column);
+        view.add(&column);
+        column.show_all();
 
-        container.show_all();
         ShowWidget {
-            container,
+            view,
-            scrolled_window,
             cover,
             description,
             episodes,
@@ -95,6 +90,14 @@ impl ShowWidget {
         debug_assert!(res.is_ok());
     }
 
+    pub(crate) fn container(&self) -> &gtk::Box {
+        self.view.container()
+    }
+
+    pub(crate) fn scrolled_window(&self) -> &gtk::ScrolledWindow {
+        self.view.scrolled_window()
+    }
+
     /// Set the show cover.
     fn set_cover(&self, pd: &Arc<Show>) -> Result<(), Error> {
         utils::set_image_from_path(&self.cover, pd.id(), 256)
@@ -110,7 +113,7 @@ impl ShowWidget {
     pub(crate) fn save_vadjustment(&self, oldid: i32) -> Result<(), Error> {
         if let Ok(mut guard) = SHOW_WIDGET_VALIGNMENT.lock() {
             let adj = self
-                .scrolled_window
+                .scrolled_window()
                 .get_vadjustment()
                 .ok_or_else(|| format_err!("Could not get the adjustment"))?;
             *guard = Some((oldid, Fragile::new(adj)));
@@ -138,7 +141,7 @@ impl ShowWidget {
             // Copy the vertical scrollbar adjustment from the old view into the new one.
             let res = fragile
                 .try_get()
-                .map(|x| utils::smooth_scroll_to(&self.scrolled_window, &x))
+                .map(|x| utils::smooth_scroll_to(self.scrolled_window(), &x))
                 .map_err(From::from);
 
             debug_assert!(res.is_ok());