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diff --git a/pv/views/trace/timemarker.hpp b/pv/views/trace/timemarker.hpp
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+++ b/pv/views/trace/timemarker.hpp
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+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2012 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_MARKER_HPP
+#define PULSEVIEW_PV_VIEWS_TRACEVIEW_MARKER_HPP
+
+#include <QColor>
+#include <QDoubleSpinBox>
+#include <QObject>
+#include <QRectF>
+#include <QWidgetAction>
+
+#include "timeitem.hpp"
+
+class QPainter;
+class QRect;
+
+namespace pv {
+namespace widgets {
+	class TimestampSpinBox;
+}
+
+namespace views {
+namespace trace {
+
+class View;
+
+class TimeMarker : public TimeItem
+{
+	Q_OBJECT
+
+public:
+	static const int ArrowSize;
+
+protected:
+	/**
+	 * Constructor.
+	 * @param view A reference to the view that owns this marker.
+	 * @param colour A reference to the colour of this cursor.
+	 * @param time The time to set the flag to.
+	 */
+	TimeMarker(View &view, const QColor &colour, const pv::util::Timestamp& time);
+
+public:
+	/**
+	 * Gets the time of the marker.
+	 */
+	const pv::util::Timestamp& time() const;
+
+	/**
+	 * Sets the time of the marker.
+	 */
+	void set_time(const pv::util::Timestamp& time) override;
+
+	float get_x() const override;
+
+	/**
+	 * Gets the arrow-tip point of the time marker.
+	 * @param rect the rectangle of the ruler area.
+	 */
+	QPoint point(const QRect &rect) const override;
+
+	/**
+	 * Computes the outline rectangle of a label.
+	 * @param rect the rectangle of the header area.
+	 * @return Returns the rectangle of the signal label.
+	 */
+	QRectF label_rect(const QRectF &rect) const override;
+
+	/**
+	 * Computes the outline rectangle of the viewport hit-box.
+	 * @param rect the rectangle of the viewport area.
+	 * @return Returns the rectangle of the hit-box.
+	 */
+	QRectF hit_box_rect(const ViewItemPaintParams &pp) const override;
+
+	/**
+	 * Gets the text to show in the marker.
+	 */
+	virtual QString get_text() const = 0;
+
+	/**
+	 * Paints the marker's label to the ruler.
+	 * @param p The painter to draw with.
+	 * @param rect The rectangle of the ruler client area.
+	 * @param hover true if the label is being hovered over by the mouse.
+	 */
+	void paint_label(QPainter &p, const QRect &rect, bool hover) override;
+
+	/**
+	 * Paints the foreground layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 */
+	void paint_fore(QPainter &p, ViewItemPaintParams &pp) override;
+
+	virtual pv::widgets::Popup* create_popup(QWidget *parent) override;
+
+private Q_SLOTS:
+	void on_value_changed(const pv::util::Timestamp& value);
+
+protected:
+	const QColor &colour_;
+
+	pv::util::Timestamp time_;
+
+	QSizeF text_size_;
+
+	QWidgetAction *value_action_;
+	pv::widgets::TimestampSpinBox *value_widget_;
+	bool updating_value_widget_;
+};
+
+} // namespace trace
+} // namespace views
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_MARKER_HPP