Show mappings in PictureViewer2

Hell, this was one heck of a bitch. Lots of changes just to show the
mapping tree in PictureViewer2. Did I mention that I hate recursion?
Added a function for fetching a SmTreeItem * from MappingTreeModel for
paths, just to turn it into a QTextDocument in PictureViewer2. Of course
everything is recursive. Did I say that I hate recursion?

Well, as said in the comments, one recursion function seems fishy, but
it works (tm).

1 files changed, 1 insertions, 1 deletions

diff --git a/smtreeitem.cpp b/smtreeitem.cpp
index 56d9b6e..ed9f73e 100644
--- a/smtreeitem.cpp
+++ b/smtreeitem.cpp
@@ -57,7 +57,7 @@ int SmTreeItem::row() const{
 	return 0;
 }
 
-SmTreeItem *SmTreeItem::parent(){
+SmTreeItem *SmTreeItem::parent() const{
 	return mParent;
 }