From ba049fdab4a47023d6d5ee8b5ff9bbb710afbabb Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 24 May 2017 11:58:40 +0100
Subject: Support basic drag-and-drop of DKDMs.

---
 src/lib/dkdm_wrapper.cc |  2 ++
 src/lib/dkdm_wrapper.h  | 16 +++++++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

(limited to 'src/lib')

diff --git a/src/lib/dkdm_wrapper.cc b/src/lib/dkdm_wrapper.cc
index 316a0581e..809739e06 100644
--- a/src/lib/dkdm_wrapper.cc
+++ b/src/lib/dkdm_wrapper.cc
@@ -75,6 +75,7 @@ DKDMGroup::add (shared_ptr<DKDMBase> child)
 {
 	DCPOMATIC_ASSERT (child);
 	_children.push_back (child);
+	child->set_parent (dynamic_pointer_cast<DKDMGroup> (shared_from_this ()));
 }
 
 void
@@ -83,6 +84,7 @@ DKDMGroup::remove (shared_ptr<DKDMBase> child)
 	for (list<shared_ptr<DKDMBase> >::iterator i = _children.begin(); i != _children.end(); ++i) {
 		if (*i == child) {
 			_children.erase (i);
+			child->set_parent (shared_ptr<DKDMGroup> ());
 			return;
 		}
 		shared_ptr<DKDMGroup> g = dynamic_pointer_cast<DKDMGroup> (*i);
diff --git a/src/lib/dkdm_wrapper.h b/src/lib/dkdm_wrapper.h
index b877722d9..d3ee2a095 100644
--- a/src/lib/dkdm_wrapper.h
+++ b/src/lib/dkdm_wrapper.h
@@ -20,18 +20,32 @@
 
 #include <dcp/encrypted_kdm.h>
 #include <libcxml/cxml.h>
+#include <boost/enable_shared_from_this.hpp>
 
 namespace xmlpp {
 	class Element;
 }
 
-class DKDMBase
+class DKDMGroup;
+
+class DKDMBase : public boost::enable_shared_from_this<DKDMBase>
 {
 public:
 	virtual std::string name () const = 0;
 	virtual void as_xml (xmlpp::Element *) const = 0;
 
 	static boost::shared_ptr<DKDMBase> read (cxml::ConstNodePtr node);
+
+	boost::shared_ptr<DKDMGroup> parent () const {
+		return _parent;
+	}
+
+	void set_parent (boost::shared_ptr<DKDMGroup> parent) {
+		_parent = parent;
+	}
+
+private:
+	boost::shared_ptr<DKDMGroup> _parent;
 };
 
 class DKDM : public DKDMBase
-- 
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