--- /dev/null
+/*
+ * This file is part of the sigrok 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef PV_VIEW_VIEWPORT_H
+#define PV_VIEW_VIEWPORT_H
+
+#include <QtOpenGL/QGLWidget>
+#include <QTimer>
+
+class QPainter;
+class QPaintEvent;
+class SigSession;
+
+namespace pv {
+namespace view {
+
+class View;
+
+class Viewport : public QGLWidget
+{
+ Q_OBJECT
+
+private:
+ static const int SignalHeight;
+
+ static const int MinorTickSubdivision;
+ static const int ScaleUnits[3];
+
+ static const QString SIPrefixes[9];
+ static const int FirstSIPrefixPower;
+
+public:
+ explicit Viewport(View &parent);
+
+ int get_total_height() const;
+
+protected:
+ void initializeGL();
+
+ void resizeGL(int width, int height);
+
+ void paintEvent(QPaintEvent *event);
+
+private:
+ void mousePressEvent(QMouseEvent *event);
+ void mouseMoveEvent(QMouseEvent *event);
+ void mouseReleaseEvent(QMouseEvent *event);
+ void wheelEvent(QWheelEvent *event);
+
+private:
+ void setup_viewport(int width, int height);
+
+ void paint_ruler(QPainter &p);
+
+private:
+ View &_view;
+
+ QPoint _mouse_down_point;
+ double _mouse_down_offset;
+};
+
+} // namespace view
+} // namespace pv
+
+#endif // PV_VIEW_VIEWPORT_H