1 files changed, 117 insertions, 0 deletions
diff --git a/app/qcheapruler.cpp b/app/qcheapruler.cpp
new file mode 100644
index 0000000..890fd63
--- /dev/null
+++ b/app/qcheapruler.cpp
@@ -0,0 +1,117 @@
+#include "qcheapruler.hpp"
+#include "naviapi_adaptor.h"
+
+#include <QString>
+
+QCheapRuler::QCheapRuler()
+{
+    //set the default current position
+    // m_currentPosition = QGeoCoordinate(36.136261, -115.151254);
+    m_currentPosition = QGeoCoordinate(35.692396, 139.691102);
+}
+
+QCheapRuler::~QCheapRuler()
+{
+}
+
+//get route distance
+double QCheapRuler::distance() const
+{
+    return m_distance;
+}
+
+//get current distance along the route
+double QCheapRuler::currentDistance() const
+{
+    return m_currentDistance;
+}
+
+//set current position below the coordinate info from navigation service
+void QCheapRuler::setCurrentPosition(double latitude, double longitude)
+{
+    //set coordinate info and notify the changes when latitude or longitude info has changed
+    if((m_currentPosition.latitude() != latitude)
+     ||(m_currentPosition.longitude() != longitude))
+    {
+        m_currentPosition.setLatitude(latitude);
+        m_currentPosition.setLongitude(longitude);
+        emit currentPositionChanged();
+    }
+}
+
+void QCheapRuler::setCurrentDistance(double distance)
+{
+    //set current distance info and notify the changes when the info has changed
+    //but it will not send notify when it start or stop demo
+    if((m_currentDistance != distance)
+    &&(distance != 0.0))
+    {
+        m_currentDistance = distance;
+        emit currentDistanceChanged();
+    }
+}
+
+//get current position(coordinate)
+QGeoCoordinate QCheapRuler::currentPosition() const
+{
+    return m_currentPosition;
+}
+
+QJSValue QCheapRuler::path() const
+{
+    // Should neveer be called.
+    return QJSValue();
+}
+
+//set route path and get the total distance
+void QCheapRuler::setPath(const QJSValue &value)
+{
+    if (!value.isArray())
+        return;
+
+    m_path.clear();
+    quint32 length = value.property(QStringLiteral("length")).toUInt();
+
+    //push back the coordinate info along the route
+    for (unsigned i = 0; i < length; ++i) {
+        auto property = value.property(i);
+        cr::point coordinate = { 0., 0. };
+
+        if (property.hasProperty(QStringLiteral("latitude")))
+            coordinate.y = property.property(QStringLiteral("latitude")).toNumber();
+
+        if (property.hasProperty(QStringLiteral("longitude")))
+            coordinate.x = property.property(QStringLiteral("longitude")).toNumber();
+
+        m_path.push_back(coordinate);
+    }
+
+    //count the total distance along the route
+    double distance = ruler().lineDistance(m_path);
+    if (m_distance != distance) {
+        m_distance = distance;
+    }
+
+    emit pathChanged();
+}
+
+//init the route and postion info when start in the first time.(can be called by qml)
+void QCheapRuler::initRouteInfo()
+{
+    //send "getRouteInfo" message to the navigation service
+    QDBusMessage message = QDBusMessage::createSignal("/", "org.agl.naviapi", "getRouteInfo");
+    if(!QDBusConnection::sessionBus().send(message))
+    {
+       qDebug() << "initRouteInfo" << "sessionBus.send(): getRouteInfo failed";
+    }
+}
+
+//init the CheapRuler class
+cr::CheapRuler QCheapRuler::ruler() const
+{
+    if (m_path.empty()) {
+        return cr::CheapRuler(0., cr::CheapRuler::Kilometers);
+    } else {
+        return cr::CheapRuler(m_currentPosition.latitude(), cr::CheapRuler::Kilometers);
+    }
+}