[gnome-boxes] spice-display: Show progress for SPICE file transfers

[Felipe Borges <felipeborges src gnome org>]

commit 63f9b30c34b6934c9bf7d589dbbcf762f134c26c
Author: Visarion Alexandru <viorel visarion gmail com>
Date:   Sat Nov 11 20:19:16 2017 +0200

    spice-display: Show progress for SPICE file transfers
    
    Display the UI for a new file transfer, using the UI elements
    implemented in previous patches
    
    https://bugzilla.gnome.org/show_bug.cgi?id=762321
    
    Fixes #81

 src/spice-display.vala | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/src/spice-display.vala b/src/spice-display.vala
index 3dd02eaf..37369a93 100644
--- a/src/spice-display.vala
+++ b/src/spice-display.vala
@@ -89,10 +89,12 @@ private string get_box_name () {
                 });
 
                 can_grab_mouse = main_channel.mouse_mode != 2;
+                new_file_transfer_id = main_channel.new_file_transfer.connect (on_new_file_transfer);
             }
     }
     ulong main_event_id;
     ulong main_mouse_mode_id;
+    ulong new_file_transfer_id;
 
     private void main_cleanup () {
         if (main_channel == null)
@@ -103,6 +105,8 @@ private void main_cleanup () {
         main_event_id = 0;
         o.disconnect (main_mouse_mode_id);
         main_mouse_mode_id = 0;
+        o.disconnect (new_file_transfer_id);
+        new_file_transfer_id = 0;
         main_channel = null;
     }
 
@@ -500,6 +504,11 @@ public override void transfer_files (GLib.List<string> uris) {
         main_file_copy_async.begin (main_channel, files, FileCopyFlags.NONE, null, null);
     }
 
+    private void on_new_file_transfer (Spice.MainChannel main_channel, Object transfer_task) {
+        DisplayPage page = machine.window.display_page;
+        page.add_transfer (transfer_task);
+    }
+
     public override List<Boxes.Property> get_properties (Boxes.PropertiesPage page) {
         var list = new List<Boxes.Property> ();