Fix incorrect results when applying some timing operations to

more than one piece of content at once (e.g. trim start).

Back-ported from 746aa7337ac2d51a4fa09039c1d5d7717cc880fa in v2.15.x.

1 files changed, 51 insertions, 0 deletions

diff --git a/src/wx/suspender.h b/src/wx/suspender.h
new file mode 100644
index 000000000..3538951a8
--- /dev/null
+++ b/src/wx/suspender.h
@@ -0,0 +1,51 @@
+/*
+    Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include <boost/function.hpp>
+#include <set>
+
+class Suspender
+{
+public:
+	Suspender (boost::function<void (int)> handler);
+
+	bool check (int property);
+
+	class Block
+	{
+	public:
+		Block (Suspender* s);
+		~Block ();
+	private:
+		Suspender* _suspender;
+	};
+
+	Block block ();
+
+private:
+	friend class Block;
+
+	void increment ();
+	void decrement ();
+
+	boost::function<void (int)> _handler;
+	int _count;
+	std::set<int> _pending;
+};