+const QColor AnalogSignal::SignalColours[4] = {
+ QColor(0xC4, 0xA0, 0x00), // Yellow
+ QColor(0x87, 0x20, 0x7A), // Magenta
+ QColor(0x20, 0x4A, 0x87), // Blue
+ QColor(0x4E, 0x9A, 0x06) // Green
+};
+
+const QColor AnalogSignal::GridMajorColor = QColor(0xB0, 0xB0, 0xB0);
+const QColor AnalogSignal::GridMinorColor = QColor(0xD0, 0xD0, 0xD0);
+
+const float AnalogSignal::EnvelopeThreshold = 256.0f;
+
+const int AnalogSignal::MaximumVDivs = 10;
+const int AnalogSignal::MinScaleIndex = -6;
+const int AnalogSignal::MaxScaleIndex = 7;
+
+AnalogSignal::AnalogSignal(
+ pv::Session &session,
+ shared_ptr<Channel> channel,
+ shared_ptr<data::Analog> data) :
+ Signal(session, channel),
+ data_(data),
+ scale_index_(4), // 20 per div
+ scale_index_drag_offset_(0),
+ div_height_(3 * QFontMetrics(QApplication::font()).height()),
+ vdivs_(1),
+ resolution_(0)
+{
+ set_colour(SignalColours[channel_->index() % countof(SignalColours)]);
+ update_scale();
+}
+
+shared_ptr<pv::data::SignalData> AnalogSignal::data() const
+{
+ return data_;
+}
+
+shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const
+{
+ return data_;
+}
+
+std::pair<int, int> AnalogSignal::v_extents() const
+{
+ const int h = vdivs_ * div_height_;
+ return make_pair(-h, h);
+}
+
+int AnalogSignal::scale_handle_offset() const
+{
+ const int h = vdivs_ * div_height_;
+
+ return ((scale_index_drag_offset_ - scale_index_) *
+ h / 4) - h / 2;
+}
+
+void AnalogSignal::scale_handle_dragged(int offset)
+{
+ const int h = vdivs_ * div_height_;
+
+ scale_index_ = scale_index_drag_offset_ -
+ (offset + h / 2) / (h / 4);
+
+ update_scale();
+}
+
+void AnalogSignal::scale_handle_drag_release()