Repo created

qt/ruler.cpp

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+#include "qt/ruler.hpp"
+
+#include "geometry/mercator.hpp"
+
+#include <iomanip>
+#include <string>
+
+namespace qt
+{
+bool Ruler::IsActive()
+{
+  return m_isActive;
+}
+
+void Ruler::SetActive(bool status)
+{
+  m_isActive = status;
+  if (!m_isActive)
+  {
+    m_polyline.clear();
+    m_sumDistanceM = 0.0;
+  }
+}
+
+void Ruler::AddPoint(m2::PointD const & point)
+{
+  m_pointsPair[0] = m_pointsPair[1];
+  m_pointsPair[1] = mercator::ToLatLon(point);
+  m_polyline.insert(m_polyline.begin(), point);
+  if (IsValidPolyline())
+    SetDistance();
+}
+
+void Ruler::DrawLine(df::DrapeApi & drapeApi)
+{
+  if (!IsValidPolyline())
+    return;
+
+  static dp::Color const lightGreyColor = dp::Color(102, 102, 102, 210);
+
+  drapeApi.RemoveLine(m_id);
+  SetId();
+  drapeApi.AddLine(m_id, df::DrapeApiLineData(m_polyline, lightGreyColor).Width(7.0f).ShowPoints(true).ShowId());
+}
+
+void Ruler::EraseLine(df::DrapeApi & drapeApi)
+{
+  drapeApi.RemoveLine(m_id);
+}
+
+bool Ruler::IsValidPolyline()
+{
+  return m_polyline.size() > 1;
+}
+
+void Ruler::SetDistance()
+{
+  m_sumDistanceM += oblate_spheroid::GetDistance(m_pointsPair[0], m_pointsPair[1]);
+}
+
+void Ruler::SetId()
+{
+  std::ostringstream curValStream;
+  curValStream << std::fixed << std::setprecision(1);
+  if (m_sumDistanceM >= 1000.0)
+    curValStream << m_sumDistanceM / 1000.0 << " km";
+  else
+    curValStream << m_sumDistanceM << " m";
+
+  m_id = curValStream.str();
+}
+}  // namespace qt