+{
+ setup_viewport(width, height);
+}
+
+void SigView::paintEvent(QPaintEvent *event)
+{
+ int offset;
+
+ const vector< shared_ptr<Signal> > &sigs =
+ _session.get_signals();
+
+ // Prepare for OpenGL rendering
+ makeCurrent();
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+
+ setup_viewport(width(), height());
+
+ qglClearColor(Qt::white);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ // Plot the signal
+ offset = RulerHeight;
+ BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+ {
+ assert(s);
+
+ const QRect signal_rect(LabelMarginWidth, offset,
+ width() - LabelMarginWidth, SignalHeight);
+
+ s->paint(*this, signal_rect, _scale, _offset);
+
+ offset += SignalHeight;
+ }
+
+ // Prepare for QPainter rendering
+ glMatrixMode(GL_MODELVIEW);
+ glPopMatrix();
+
+ QPainter painter(this);
+ painter.setRenderHint(QPainter::Antialiasing);
+
+ // Paint the labels
+ offset = RulerHeight;
+ BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
+ {
+ assert(s);
+
+ const QRect label_rect(0, offset,
+ LabelMarginWidth, SignalHeight);
+ s->paint_label(painter, label_rect);
+
+ offset += SignalHeight;
+ }
+
+ // Paint the ruler
+ paint_ruler(painter);
+
+ painter.end();
+}
+
+void SigView::data_updated()
+{
+ update();
+}
+
+void SigView::mousePressEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ _mouse_down_point = event->pos();
+ _mouse_down_offset = _offset;
+}
+
+void SigView::mouseMoveEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ if(event->buttons() & Qt::LeftButton)
+ {
+ _offset = _mouse_down_offset + (_mouse_down_point - event->pos()).x() * _scale;
+ update();
+ }
+}
+
+void SigView::mouseReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+}
+
+void SigView::wheelEvent(QWheelEvent *event)
+{
+ assert(event);
+
+ const double x = event->x() - LabelMarginWidth;
+ const double cursor_offset = _offset + _scale * x;
+ _scale *= powf(3.0/2.0, -event->delta() / 120);
+ _offset = cursor_offset - _scale * x;
+ update();
+}
+
+void SigView::setup_viewport(int width, int height)