[gnome-boxes] UnattendedInstaller.check_needed_info -> InstallerMedia

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit e788db134f96a2e8d55e12c0e03633e763639111
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Jul 11 12:05:22 2012 +0300

    UnattendedInstaller.check_needed_info -> InstallerMedia
    
    Move check_needed_info from UnattendedInstaller to parent InstallerMedia
    so that users of this function don't need type checks and casting to be
    able to use it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=679706

 src/installer-media.vala      |    1 +
 src/unattended-installer.vala |    2 +-
 src/wizard.vala               |    3 +--
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/installer-media.vala b/src/installer-media.vala
index 3ae0a84..5d78edc 100644
--- a/src/installer-media.vala
+++ b/src/installer-media.vala
@@ -81,6 +81,7 @@ private class Boxes.InstallerMedia : GLib.Object {
 
     public virtual void setup_spice_config (DomainGraphicsSpice graphics) {}
     public virtual void populate_setup_vbox (Gtk.VBox setup_vbox) {}
+    public virtual void check_needed_info () throws UnattendedInstallerError.SETUP_INCOMPLETE {}
 
     public bool is_architecture_compatible (string architecture) {
         return os_media == null || // Unknown media
diff --git a/src/unattended-installer.vala b/src/unattended-installer.vala
index 1b6f03c..639d38e 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -162,7 +162,7 @@ private abstract class Boxes.UnattendedInstaller: InstallerMedia {
     }
 
     // Ensure needed information was provided by user
-    public virtual void check_needed_info () throws UnattendedInstallerError.SETUP_INCOMPLETE {
+    public override void check_needed_info () throws UnattendedInstallerError.SETUP_INCOMPLETE {
         if (!express_toggle.active)
             return;
 
diff --git a/src/wizard.vala b/src/wizard.vala
index a022b8b..dcb15f0 100644
--- a/src/wizard.vala
+++ b/src/wizard.vala
@@ -304,8 +304,7 @@ private class Boxes.Wizard: Boxes.UI {
 
         if (vm_creator != null) {
             try {
-                if (vm_creator.install_media is UnattendedInstaller)
-                    (vm_creator.install_media as UnattendedInstaller).check_needed_info ();
+                vm_creator.install_media.check_needed_info ();
                 machine = yield vm_creator.create_vm (null);
             } catch (IOError.CANCELLED cancel_error) { // We did this, so ignore!
                 return false;