+ scale_offset_changed();
+}
+
+vector< shared_ptr<Trace> > View::get_traces() const
+{
+ const vector< shared_ptr<Signal> > sigs(
+ session().get_signals());
+#ifdef ENABLE_DECODE
+ const vector< shared_ptr<DecodeTrace> > decode_sigs(
+ session().get_decode_signals());
+ vector< shared_ptr<Trace> > traces(
+ sigs.size() + decode_sigs.size());
+#else
+ vector< shared_ptr<Trace> > traces(sigs.size());
+#endif
+
+ auto i = traces.begin();
+ i = copy(sigs.begin(), sigs.end(), i);
+#ifdef ENABLE_DECODE
+ i = copy(decode_sigs.begin(), decode_sigs.end(), i);
+#endif
+
+ stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
+ return traces;
+}
+
+list<weak_ptr<SelectableItem> > View::selected_items() const
+{
+ list<weak_ptr<SelectableItem> > items;
+
+ // List the selected signals
+ const vector< shared_ptr<Trace> > traces(get_traces());
+ BOOST_FOREACH (shared_ptr<Trace> t, traces) {
+ assert(t);
+ if (t->selected())
+ items.push_back(t);
+ }
+
+ // List the selected cursors
+ if (_cursors.first()->selected())
+ items.push_back(_cursors.first());
+ if (_cursors.second()->selected())
+ items.push_back(_cursors.second());
+
+ return items;
+}
+
+set< shared_ptr<SignalData> > View::get_visible_data() const
+{
+ const vector< shared_ptr<Signal> > sigs(
+ session().get_signals());
+
+ // Make a set of all the visible data objects
+ set< shared_ptr<SignalData> > visible_data;
+ BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
+ if (sig->enabled())
+ visible_data.insert(sig->data());
+
+ return visible_data;
+}
+
+pair<double, double> View::get_time_extents() const
+{
+ const set< shared_ptr<SignalData> > visible_data = get_visible_data();
+ if (visible_data.empty())
+ return make_pair(0.0, 0.0);
+
+ double left_time = DBL_MAX, right_time = DBL_MIN;
+ BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
+ {
+ const double start_time = d->get_start_time();
+ double samplerate = d->samplerate();
+ samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
+
+ left_time = min(left_time, start_time);
+ right_time = max(right_time, start_time +
+ d->get_max_sample_count() / samplerate);
+ }
+
+ assert(left_time < right_time);
+ return make_pair(left_time, right_time);
+}
+
+bool View::cursors_shown() const
+{
+ return _show_cursors;
+}
+
+void View::show_cursors(bool show)
+{
+ _show_cursors = show;
+ _ruler->update();
+ _viewport->update();
+}
+
+void View::centre_cursors()
+{
+ const double time_width = _scale * _viewport->width();
+ _cursors.first()->set_time(_offset + time_width * 0.4);
+ _cursors.second()->set_time(_offset + time_width * 0.6);
+ _ruler->update();
+ _viewport->update();
+}
+
+CursorPair& View::cursors()
+{
+ return _cursors;
+}
+
+const CursorPair& View::cursors() const
+{
+ return _cursors;
+}
+
+const QPoint& View::hover_point() const
+{
+ return _hover_point;
+}
+
+void View::normalize_layout()
+{
+ const vector< shared_ptr<Trace> > traces(get_traces());
+
+ int v_min = INT_MAX;
+ BOOST_FOREACH(const shared_ptr<Trace> t, traces)
+ v_min = min(t->get_v_offset(), v_min);
+
+ const int delta = -min(v_min, 0);
+ BOOST_FOREACH(shared_ptr<Trace> t, traces)
+ t->set_v_offset(t->get_v_offset() + delta);
+
+ verticalScrollBar()->setSliderPosition(_v_offset + delta);
+ v_scroll_value_changed(verticalScrollBar()->sliderPosition());
+}
+
+void View::update_viewport()
+{
+ assert(_viewport);
+ _viewport->update();
+}
+
+void View::get_scroll_layout(double &length, double &offset) const
+{
+ const pair<double, double> extents = get_time_extents();
+ length = (extents.second - extents.first) / _scale;
+ offset = _offset / _scale;
+}
+
+void View::set_zoom(double scale, int offset)
+{
+ const double cursor_offset = _offset + _scale * offset;
+ const double new_scale = max(min(scale, MaxScale), MinScale);
+ const double new_offset = cursor_offset - new_scale * offset;
+ set_scale_offset(new_scale, new_offset);