[gnome-boxes] wizard: only return to collection view when creation succeed

[Marc-Andre Lureau <malureau src gnome org>]

commit b5661e35793a9f42bf8adcb6025b730e00b4c71c
Author: Marc-Andrà Lureau <marcandre lureau gmail com>
Date:   Wed Nov 23 01:26:00 2011 +0100

    wizard: only return to collection view when creation succeed
    
    https://bugzilla.gnome.org/show_bug.cgi?id=664603

 src/wizard.vala |   34 ++++++++++++++--------------------
 1 files changed, 14 insertions(+), 20 deletions(-)
---
diff --git a/src/wizard.vala b/src/wizard.vala
index 31b2627..5ac210a 100644
--- a/src/wizard.vala
+++ b/src/wizard.vala
@@ -70,10 +70,11 @@ private class Boxes.Wizard: Boxes.UI {
                     break;
 
                 case WizardPage.LAST:
-                    if (!create ())
-                        return;
-                    app.ui_state = UIState.COLLECTION;
-                    break;
+                    create.begin ((source, result) => {
+                       if (create.end (result))
+                           app.ui_state = UIState.COLLECTION;
+                    });
+                    return;
                 }
             }
 
@@ -121,13 +122,20 @@ private class Boxes.Wizard: Boxes.UI {
         setup_ui ();
     }
 
-    private bool create () {
+    private async bool create () {
         if (source == null) {
             if (install_media == null)
                 return false;
 
             next_button.sensitive = false;
-            vm_creator.create_and_launch_vm.begin (install_media, resources, null, on_vm_created);
+            try {
+                yield vm_creator.create_and_launch_vm (install_media, resources, null);
+            } catch (IOError.CANCELLED cancel_error) { // We did this, so ignore!
+            } catch (GLib.Error error) {
+                warning (error.message);
+                return false;
+            }
+
             install_media = null;
             resources = null;
             wizard_source.uri = "";
@@ -140,20 +148,6 @@ private class Boxes.Wizard: Boxes.UI {
         return true;
     }
 
-    private void on_vm_created (Object? source_object, AsyncResult result) {
-        try {
-            vm_creator.create_and_launch_vm.end (result);
-        } catch (IOError.CANCELLED cancel_error) { // We did this, so ignore!
-        } catch (GLib.Error error) {
-            warning ("Fixme: %s".printf (error.message));
-
-            return;
-        }
-
-        // Only let the user through if either VM was successfully created or operation was cancelled
-        next_button.sensitive = true;
-    }
-
     private void prepare_for_location (string location) throws GLib.Error {
         var file = File.new_for_uri (location);