+/*
+ * 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_HEADERITEM_H
+#define PULSEVIEW_PV_VIEW_HEADERITEM_H
+
+#include "selectableitem.h"
+
+namespace pv {
+namespace view {
+
+class View;
+
+class RowItem : public SelectableItem
+{
+public:
+ /**
+ * Constructor.
+ */
+ RowItem();
+
+ /**
+ * Returns true if the item is visible and enabled.
+ */
+ virtual bool enabled() const = 0;
+
+ /**
+ * Gets the vertical layout offset of this signal.
+ */
+ int get_v_offset() const;
+
+ /**
+ * Sets the vertical layout offset of this signal.
+ */
+ void set_v_offset(int v_offset);
+
+ /**
+ * Sets the view that owns this trace in the view trace hierachy.
+ * @param The new owner of the trace.
+ */
+ void set_view(pv::view::View *view);
+
+ /**
+ * Gets the y-offset of the axis.
+ */
+ int get_y() const;
+
+ /**
+ * Paints the background layer of the trace with a QPainter
+ * @param p the QPainter to paint into.
+ * @param left the x-coordinate of the left edge of the signal
+ * @param right the x-coordinate of the right edge of the signal
+ **/
+ virtual void paint_back(QPainter &p, int left, int right);
+
+ /**
+ * Paints the mid-layer of the trace with a QPainter
+ * @param p the QPainter to paint into.
+ * @param left the x-coordinate of the left edge of the signal
+ * @param right the x-coordinate of the right edge of the signal
+ **/
+ virtual void paint_mid(QPainter &p, int left, int right);
+
+ /**
+ * Paints the foreground layer of the trace with a QPainter
+ * @param p the QPainter to paint into.
+ * @param left the x-coordinate of the left edge of the signal
+ * @param right the x-coordinate of the right edge of the signal
+ **/
+ virtual void paint_fore(QPainter &p, int left, int right);
+
+ /**
+ * 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.
+ */
+ virtual void paint_label(QPainter &p, int right, bool hover) = 0;
+
+ /**
+ * 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.
+ */
+ virtual QRectF label_rect(int right) = 0;
+
+public:
+ virtual void hover_point_changed();
+
+protected:
+ pv::view::View *_view;
+
+ int _v_offset;
+};
+
+} // namespace view
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEW_HEADERITEM_H