--- /dev/null
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2013 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef PULSEVIEW_PV_VIEW_TRACEGROUP_H
+#define PULSEVIEW_PV_VIEW_TRACEGROUP_H
+
+#include "rowitem.hpp"
+#include "rowitemowner.hpp"
+
+namespace pv {
+namespace view {
+
+class TraceGroup : public RowItem, public RowItemOwner
+{
+ Q_OBJECT
+
+private:
+ static const int Padding;
+ static const int Width;
+ static const int LineThickness;
+ static const QColor LineColour;
+
+public:
+ /**
+ * Virtual destructor
+ */
+ virtual ~TraceGroup();
+
+ /**
+ * Returns true if the item is visible and enabled.
+ */
+ bool enabled() const;
+
+ /**
+ * Returns the session of the onwer.
+ */
+ pv::SigSession& session();
+
+ /**
+ * Returns the session of the onwer.
+ */
+ const pv::SigSession& session() const;
+
+ /**
+ * Returns the view of the owner.
+ */
+ virtual pv::view::View* view();
+
+ /**
+ * Returns the view of the owner.
+ */
+ virtual const pv::view::View* view() const;
+
+ /**
+ * Computes the vertical extents of the contents of this row item.
+ * @return A pair containing the minimum and maximum y-values.
+ */
+ std::pair<int, int> v_extents() const;
+
+ /**
+ * Paints the signal label.
+ * @param p the QPainter to paint into.
+ * @param right the x-coordinate of the right edge of the header
+ * area.
+ * @param hover true if the label is being hovered over by the mouse.
+ */
+ void paint_label(QPainter &p, int right, bool hover);
+
+ /**
+ * Computes the outline rectangle of a label.
+ * @param right the x-coordinate of the right edge of the header
+ * area.
+ * @return Returns the rectangle of the signal label.
+ */
+ QRectF label_rect(int right) const;
+
+ /**
+ * Determines if a point is in the header label rect.
+ * @param left the x-coordinate of the left edge of the header
+ * area.
+ * @param right the x-coordinate of the right edge of the header
+ * area.
+ * @param point the point to test.
+ */
+ bool pt_in_label_rect(int left, int right, const QPoint &point);
+
+ QMenu* create_context_menu(QWidget *parent);
+
+ pv::widgets::Popup* create_popup(QWidget *parent);
+
+ /**
+ * Returns the total vertical offset of this trace and all it's owners
+ */
+ int owner_visual_v_offset() const;
+
+ void restack_items();
+
+ /**
+ * Returns the number of nested parents that this row item owner has.
+ */
+ unsigned int depth() const;
+
+ void ungroup();
+
+public:
+ void appearance_changed(bool label, bool content);
+
+ void extents_changed(bool horz, bool vert);
+
+private Q_SLOTS:
+ void on_ungroup();
+};
+
+} // view
+} // pv
+
+#endif // PULSEVIEW_PV_VIEW_TRACEGROUP_H