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diff --git a/pv/views/trace/flag.hpp b/pv/views/trace/flag.hpp
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+++ b/pv/views/trace/flag.hpp
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+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PULSEVIEW_PV_VIEWS_TRACEVIEW_FLAG_HPP
+#define PULSEVIEW_PV_VIEWS_TRACEVIEW_FLAG_HPP
+
+#include <memory>
+
+#include "timemarker.hpp"
+
+using std::enable_shared_from_this;
+
+class QMenu;
+
+namespace pv {
+namespace views {
+namespace trace {
+
+class Flag : public TimeMarker, public enable_shared_from_this<Flag>
+{
+	Q_OBJECT
+
+public:
+	static const QColor FillColour;
+
+public:
+	/**
+	 * Constructor.
+	 * @param view A reference to the view that owns this cursor pair.
+	 * @param time The time to set the flag to.
+	 * @param text The text of the marker.
+	 */
+	Flag(View &view, const pv::util::Timestamp& time, const QString &text);
+
+	/**
+	 * Copy constructor.
+	 */
+	Flag(const Flag &flag);
+
+	/**
+	 * Returns true if the item is visible and enabled.
+	 */
+	bool enabled() const;
+
+	/**
+	 * Gets the text to show in the marker.
+	 */
+	QString get_text() const;
+
+	pv::widgets::Popup* create_popup(QWidget *parent);
+
+	QMenu* create_context_menu(QWidget *parent);
+
+	void delete_pressed();
+
+private Q_SLOTS:
+	void on_delete();
+
+	void on_text_changed(const QString &text);
+
+private:
+	QString text_;
+};
+
+} // namespace trace
+} // namespace views
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_FLAG_HPP