Fix #684 by implementing snap-to-edge for TimeItem-based classes

[pulseview.git] / pv / views / trace / analogsignal.cpp

diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp
index d8dbf6f1a08222fe71c1ed047316e3644d05dfd1..0419b03b698eb208496e15b75957c2eb8b6d9663 100644 (file)
--- a/pv/views/trace/analogsignal.cpp
+++ b/pv/views/trace/analogsignal.cpp
@@ -62,6 +62,7 @@ using std::pair;
 using std::shared_ptr;
 using std::vector;
 
+using pv::data::LogicSegment;
 using pv::data::SignalBase;
 using pv::util::SIPrefix;
 
@@ -105,12 +106,12 @@ AnalogSignal::AnalogSignal(
        shared_ptr<data::SignalBase> base) :
        Signal(session, base),
        scale_index_(4), // 20 per div
-       scale_index_drag_offset_(0),
        pos_vdivs_(1),
        neg_vdivs_(1),
        resolution_(0),
        display_type_(DisplayBoth),
-       autoranging_(true)
+       autoranging_(true),
+       value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN())
 {
        axis_pen_ = AxisPen;
 
@@ -183,28 +184,6 @@ pair<int, int> AnalogSignal::v_extents() const
        return make_pair(-ph, nh);
 }
 
-int AnalogSignal::scale_handle_offset() const
-{
-       const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
-
-       return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
-}
-
-void AnalogSignal::scale_handle_dragged(int offset)
-{
-       const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
-
-       scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
-
-       update_scale();
-}
-
-void AnalogSignal::scale_handle_drag_release()
-{
-       scale_index_drag_offset_ = scale_index_;
-       update_scale();
-}
-
 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 {
        Signal::on_setting_changed(key, value);
@@ -785,6 +764,37 @@ void AnalogSignal::update_conversion_widgets()
        conv_threshold_cb_->blockSignals(false);
 }
 
+vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
+{
+       assert(base_);
+       assert(owner_);
+
+       // Return if there's no logic data or we're showing only the analog trace
+       if (!base_->logic_data() || (display_type_ == DisplayAnalog))
+               return vector<data::LogicSegment::EdgePair>();
+
+       if (sample_pos == 0)
+               return vector<LogicSegment::EdgePair>();
+
+       shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
+       if (!segment || (segment->get_sample_count() == 0))
+               return vector<LogicSegment::EdgePair>();
+
+       const View *view = owner_->view();
+       assert(view);
+       const double samples_per_pixel = base_->get_samplerate() * view->scale();
+
+       vector<LogicSegment::EdgePair> edges;
+
+       segment->get_surrounding_edges(edges, sample_pos,
+               samples_per_pixel / LogicSignal::Oversampling, 0);
+
+       if (edges.empty())
+               return vector<LogicSegment::EdgePair>();
+
+       return edges;
+}
+
 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 {
        const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
@@ -1036,7 +1046,7 @@ void AnalogSignal::hover_point_changed(const QPoint &hp)
        } else {
                try {
                        value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
-               } catch (out_of_range) {
+               } catch (out_of_range&) {
                        value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
                }
        }