--- /dev/null
+/*
+ * 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_HEADER_HPP
+#define PULSEVIEW_PV_VIEWS_TRACEVIEW_HEADER_HPP
+
+#include <list>
+#include <memory>
+#include <utility>
+
+#include "marginwidget.hpp"
+
+using std::shared_ptr;
+using std::vector;
+
+namespace pv {
+namespace views {
+namespace trace {
+
+class TraceTreeItem;
+class View;
+class ViewItem;
+
+class Header : public MarginWidget
+{
+ Q_OBJECT
+
+private:
+ static const int Padding;
+
+public:
+ Header(View &parent);
+
+ QSize sizeHint() const;
+
+ /**
+ * The extended area that the header widget would like to be sized to.
+ * @remarks This area is the area specified by sizeHint, extended by
+ * the area to overlap the viewport.
+ */
+ QSize extended_size_hint() const;
+
+private:
+ /**
+ * Gets the row items.
+ */
+ vector< shared_ptr<ViewItem> > items();
+
+ /**
+ * Gets the first view item which has a label that contains @c pt .
+ * @param pt the point to search with.
+ * @return the view item that has been found, or and empty
+ * @c shared_ptr if no item was found.
+ */
+ shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt);
+
+private:
+ void paintEvent(QPaintEvent *event);
+
+private:
+ void contextMenuEvent(QContextMenuEvent *event);
+
+ void keyPressEvent(QKeyEvent *event);
+
+private Q_SLOTS:
+ void on_group();
+
+ void on_ungroup();
+};
+
+} // namespace trace
+} // namespace views
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_HEADER_HPP