[gparted] Display busy status of the file system within LUKS encryption (#774818)

[Curtis Gedak <gedakc src gnome org>]

commit 2be136b9fdd0a4882ac4438c0f4d4e2d8669297d
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Mon Aug 8 16:05:25 2016 +0100

    Display busy status of the file system within LUKS encryption (#774818)
    
    In the main window, display the busy status of the file system only
    according to whether it is mounted or not, ignoring the status of the
    encryption mapping.
    
    Bug 774818 - Implement LUKS read-write actions NOT requiring a
                 passphrase

 src/TreeView_Detail.cc |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/TreeView_Detail.cc b/src/TreeView_Detail.cc
index 707da9d..3ef4608 100644
--- a/src/TreeView_Detail.cc
+++ b/src/TreeView_Detail.cc
@@ -154,7 +154,10 @@ void TreeView_Detail::create_row( const Gtk::TreeRow & treerow,
                                   bool & show_mountpoints,
                                   bool & show_labels )
 {
-       if ( partition .busy )
+       const Partition * filesystem_ptn = &partition;
+       if ( partition.filesystem == FS_LUKS && partition.busy )
+               filesystem_ptn = &dynamic_cast<const PartitionLUKS *>( &partition )->get_encrypted();
+       if ( filesystem_ptn->busy )
                treerow[ treeview_detail_columns .icon1 ] = 
                        render_icon( Gtk::Stock::DIALOG_AUTHENTICATION, Gtk::ICON_SIZE_BUTTON );