Added a probably terrible way to update podcast_view async.

hammond-gtk/src/headerbar.rs

@@ -9,7 +9,7 @@ use utils;
 
 use std::sync::{Arc, Mutex};
 
-pub fn get_headerbar(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack) -> gtk::HeaderBar {
+pub fn get_headerbar(db: Arc<Mutex<SqliteConnection>>, stack: gtk::Stack) -> gtk::HeaderBar {
     let builder = include_str!("../gtk/headerbar.ui");
     let builder = gtk::Builder::new_from_string(builder);
 
@@ -65,7 +65,7 @@ pub fn get_headerbar(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack) -> g
     let db_clone = db.clone();
     // FIXME: There appears to be a memmory leak here.
     refresh_button.connect_clicked(move |_| {
-        utils::refresh_db(&db_clone, &stack_clone);
+        utils::refresh_db(db_clone.clone(), stack_clone.clone());
     });
 
     header

hammond-gtk/src/main.rs

@@ -1,10 +1,9 @@
 #![cfg_attr(feature = "cargo-clippy", allow(clone_on_ref_ptr))]
 
-// extern crate glib;
-
 extern crate gdk;
 extern crate gdk_pixbuf;
 extern crate gio;
+extern crate glib;
 extern crate gtk;
 
 extern crate diesel;
@@ -55,7 +54,7 @@ fn build_ui(app: &gtk::Application) {
     });
 
     // Get the headerbar
-    let header = headerbar::get_headerbar(&db, &stack);
+    let header = headerbar::get_headerbar(db, stack);
     // Uncomment this when etag implementation is fixed and refesh_db thread is non blocking.
     // utils::refresh_db(&db, &stack);
     window.set_titlebar(&header);

hammond-gtk/src/utils.rs

@@ -1,6 +1,6 @@
 #![cfg_attr(feature = "cargo-clippy", allow(clone_on_ref_ptr))]
 
-// use glib;
+use glib;
 
 use gtk;
 // use gtk::prelude::*;
@@ -11,25 +11,37 @@ use hammond_data::models::Source;
 use diesel::prelude::SqliteConnection;
 
 use std::thread;
+use std::cell::RefCell;
 use std::sync::{Arc, Mutex};
+use std::sync::mpsc::{channel, Receiver};
 
 use views::podcasts_view;
 
-pub fn refresh_db(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack) {
+thread_local!(
+    static GLOBAL: RefCell<Option<(Arc<Mutex<SqliteConnection>>,
+    gtk::Stack,
+    Receiver<bool>)>> = RefCell::new(None));
+
+pub fn refresh_db(db: Arc<Mutex<SqliteConnection>>, stack: gtk::Stack) {
+    let (sender, receiver) = channel();
+
     let db_clone = db.clone();
-    let handle = thread::spawn(move || {
+    GLOBAL.with(move |global| {
+        *global.borrow_mut() = Some((db_clone, stack, receiver));
+    });
+
+    // The implementation of how this is done is probably terrible but it works!.
+    let db_clone = db.clone();
+    thread::spawn(move || {
         let t = hammond_data::index_feed::index_loop(&db_clone, false);
         if t.is_err() {
             error!("Error While trying to update the database.");
             error!("Error msg: {}", t.unwrap_err());
         };
-    });
-    // FIXME: atm freezing the ui till update is done.
-    // Make it instead emmit a signal on update completion.
-    // TODO: emit a signal in order to update the podcast widget.
-    let _ = handle.join();
+        sender.send(true).expect("Couldn't send data to channel");;
 
-    podcasts_view::update_podcasts_view(db, stack);
+        glib::idle_add(receive);
+    });
 }
 
 pub fn refresh_feed(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack, source: &mut Source) {
@@ -54,7 +66,6 @@ pub fn refresh_feed(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack, sourc
     // Make it instead emmit a signal on update completion.
     // TODO: emit a signal in order to update the podcast widget.
     let _ = handle.join();
-
     podcasts_view::update_podcasts_view(db, stack);
 }
 
@@ -77,3 +88,14 @@ pub fn refresh_feed(db: &Arc<Mutex<SqliteConnection>>, stack: &gtk::Stack, sourc
 //     info!("{}", markup);
 //     markup
 // }
+
+fn receive() -> glib::Continue {
+    GLOBAL.with(|global| {
+        if let Some((ref db, ref stack, ref reciever)) = *global.borrow() {
+            if let Ok(_) = reciever.try_recv() {
+                podcasts_view::update_podcasts_view(db, stack);
+            }
+        }
+    });
+    glib::Continue(false)
+}

hammond-gtk/src/widgets/episode.rs

@@ -100,6 +100,7 @@ fn epidose_widget(
     ep
 }
 
+
 pub fn episodes_listbox(connection: &Arc<Mutex<SqliteConnection>>, pd_title: &str) -> gtk::ListBox {
     // TODO: handle unwraps.
     let m = connection.lock().unwrap();

hammond-gtk/src/widgets/podcast.rs

@@ -29,7 +29,7 @@ pub fn podcast_widget(
 
     if let Some(t) = title {
         title_label.set_text(t);
-        let listbox = episodes_listbox(&connection.clone(), t);
+        let listbox = episodes_listbox(&connection, t);
         view.add(&listbox);
     }