[connections/indicate-active-connections-with-thumbnail] thumbnail: Indicate active connection by showing the thumbnail

[Felipe Borges <felipeborges src gnome org>]

commit 3ee04f040851ba9a396efb970d3d51038a1240e6
Author: Felipe Borges <felipeborges gnome org>
Date:   Thu Jul 29 15:52:19 2021 +0200

    thumbnail: Indicate active connection by showing the thumbnail
    
    When a connection is open we present a thumbnail of it, updated
    every 3 seconds.
    
    When a connection is closed we set an icon as thumbnail.
    
    Fixes #55

 src/collection-view-child.vala | 35 ++++++++++++---------
 src/connection.vala            |  5 ---
 src/meson.build                |  1 -
 src/thumbnailer.vala           | 71 ------------------------------------------
 4 files changed, 21 insertions(+), 91 deletions(-)
---
diff --git a/src/collection-view-child.vala b/src/collection-view-child.vala
index 1df4dfa..0467e38 100644
--- a/src/collection-view-child.vala
+++ b/src/collection-view-child.vala
@@ -30,33 +30,40 @@ namespace Connections {
         [GtkChild]
         public unowned Gtk.Image thumbnail; 
 
+        private uint thumbnail_id = 0;
+
         public CollectionViewChild (Connection connection) {
             this.connection = connection;
 
             update_display_name ();
             connection.notify["display-name"].connect (update_display_name);
 
-            connection.thumbnailer.update.connect (() => {
-                thumbnail.set_from_pixbuf (connection.thumbnail.scale_simple (180, 134, 
Gdk.InterpType.BILINEAR));
-            }); 
-
-            update_thumbnail.begin ();
+            connection.show.connect (update_thumbnail);
         }
 
         private void update_display_name () {
             connection_name.set_text (connection.get_visible_name ());
         }
 
-        private async void update_thumbnail () {
-            var file = GLib.File.new_for_path (connection.thumbnailer.thumbnail_path);
-            if (file.query_exists ()) {
-                try {
-                    var pixbuf = new Gdk.Pixbuf.from_file_at_scale (file.get_path (), 180, 134, true);
-                    thumbnail.set_from_pixbuf (pixbuf);
-                } catch (GLib.Error error) {
-                    debug ("Failed to update thumbnail: %s", error.message);
+        private void update_thumbnail () {
+            thumbnail_id = Timeout.add_seconds (3, () => {
+                if (!connection.connected) {
+                    thumbnail_id = 0;
+                    thumbnail.set_from_icon_name ("org.gnome.Connections-symbolic",
+                                                  Gtk.IconSize.LARGE_TOOLBAR);
+                    return false;
                 }
-            }
+
+                thumbnail.set_from_pixbuf (connection.thumbnail.scale_simple (180, 134,
+                                                                              Gdk.InterpType.BILINEAR));
+
+                return true;
+            });
+        }
+
+        ~CollectionViewChild () {
+            if (thumbnail_id != 0)
+                Source.remove (thumbnail_id);
         }
     }
 }
diff --git a/src/connection.vala b/src/connection.vala
index 53c63b8..7248cd4 100644
--- a/src/connection.vala
+++ b/src/connection.vala
@@ -51,7 +51,6 @@ namespace Connections {
 
         public abstract void send_keys (uint[] keys);
 
-        public Thumbnailer thumbnailer;
         public abstract Gdk.Pixbuf? thumbnail { set; owned get; }
 
         public async void take_screenshot () {
@@ -150,10 +149,6 @@ namespace Connections {
         }
 
         construct {
-            thumbnailer = new Connections.Thumbnailer (this);
-
-            show.connect (() => { thumbnailer.update_thumbnail (); });
-
             notify.connect (save);
         }
 
diff --git a/src/meson.build b/src/meson.build
index bee8184..de1100b 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -15,7 +15,6 @@ connections_sources = [
   'preferences-widgets.vala',
   'rdp-connection.vala',
   'rdp-preferences-window.vala',
-  'thumbnailer.vala',
   'topbar.vala',
   'vnc-connection.vala',
   'vnc-preferences-window.vala',