Navaid diagram work

src/GUI/AirportDiagram.cxx

@@ -182,14 +182,7 @@ void AirportDiagram::addParking(FGParkingRef park)
 
 void AirportDiagram::paintContents(QPainter* p)
 {
-      // fit bounds within our available space, allowing for a margin
+    QTransform t = p->transform();
-//    const int MARGIN = 32; // pixels
- //   double ratioInX = (width() - MARGIN * 2) / m_bounds.width();
- //   double ratioInY = (height() - MARGIN * 2) / m_bounds.height();
-  //  double scale = std::min(ratioInX, ratioInY);
-
-    QTransform t(transform());
-    p->setTransform(t);
 
 // pavements
     QBrush brush(QColor(0x9f, 0x9f, 0x9f));

src/GUI/BaseDiagram.cxx

@@ -113,6 +113,9 @@ void BaseDiagram::wheelEvent(QWheelEvent *we)
     m_autoScalePan = false;
 
     int delta = we->angleDelta().y();
+    if (delta == 0)
+        return;
+
     if (intSign(m_wheelAngleDeltaAccumulator) != intSign(delta)) {
         m_wheelAngleDeltaAccumulator = 0;
     }
@@ -121,7 +124,7 @@ void BaseDiagram::wheelEvent(QWheelEvent *we)
     if (m_wheelAngleDeltaAccumulator > 120) {
         m_wheelAngleDeltaAccumulator = 0;
         m_scale *= 2.0;
-    } else if (m_wheelAngleDeltaAccumulator < 120) {
+    } else if (m_wheelAngleDeltaAccumulator < -120) {
         m_wheelAngleDeltaAccumulator = 0;
         m_scale *= 0.5;
     }

src/GUI/NavaidDiagram.cxx

@@ -41,12 +41,71 @@ void NavaidDiagram::setNavaid(FGPositionedRef nav)
 {
     m_navaid = nav;
     m_projectionCenter = nav ? nav->geod() : SGGeod();
-    m_scale = 1.0;
+    m_geod = nav->geod();
-    m_bounds = QRectF(); // clear
+    recomputeBounds(true);
+}
+
+void NavaidDiagram::setGeod(const SGGeod &geod)
+{
+    m_navaid.clear();
+    m_geod = geod;
+    m_projectionCenter = m_geod;
+    recomputeBounds(true);
+}
+
+void NavaidDiagram::setOffsetEnabled(bool offset)
+{
+    if (m_offsetEnabled == offset)
+        return;
+    m_offsetEnabled = offset;
+    recomputeBounds(true);
+}
+
+void NavaidDiagram::setOffsetDistanceNm(double distanceNm)
+{
+    m_offsetDistanceNm = distanceNm;
     update();
 }
 
-void NavaidDiagram::paintContents(QPainter *)
+void NavaidDiagram::setOffsetBearingDeg(int bearingDeg)
 {
+    m_offsetBearingDeg = bearingDeg;
+    update();
+}
+
+void NavaidDiagram::paintContents(QPainter *painter)
+{
+    QPointF base = project(m_geod);
+
+    if (m_offsetEnabled) {
+        double d = m_offsetDistanceNm * SG_NM_TO_METER;
+        SGGeod offsetGeod = SGGeodesy::direct(m_geod, m_offsetBearingDeg, d);
+        QPointF offset = project(offsetGeod);
+
+        qDebug() << base << offset;
+
+        QPen pen(Qt::green);
+        pen.setCosmetic(true);
+        painter->setPen(pen);
+        painter->drawLine(base, offset);
+    }
+}
+
+void NavaidDiagram::doComputeBounds()
+{
+    extendBounds(project(m_geod));
+
+// project three points around the base location at 40nm to give some
+// coverage
+    for (int i=0; i<3; ++i) {
+        SGGeod pt = SGGeodesy::direct(m_geod, i * 120, SG_NM_TO_METER * 40.0);
+        extendBounds(project(pt));
+    }
+
+    if (m_offsetEnabled) {
+        double d = m_offsetDistanceNm * SG_NM_TO_METER;
+        SGGeod offsetPos = SGGeodesy::direct(m_geod, m_offsetBearingDeg, d);
+        extendBounds(project(offsetPos));
+    }
 
 }

src/GUI/NavaidDiagram.hxx

@@ -35,8 +35,10 @@ public:
 
     void setNavaid(FGPositionedRef nav);
 
+    void setGeod(const SGGeod& geod);
+
     bool isOffsetEnabled() const;
-    void setOffsetEnabled(bool m_offset);
+    void setOffsetEnabled(bool offset);
 
     void setOffsetDistanceNm(double distanceNm);
     double offsetDistanceNm() const;
@@ -49,8 +51,10 @@ public:
 protected:
     void paintContents(QPainter *) Q_DECL_OVERRIDE;
 
+    void doComputeBounds() Q_DECL_OVERRIDE;
 private:
     FGPositionedRef m_navaid;
+    SGGeod m_geod;
 
     bool m_offsetEnabled;
     double m_offsetDistanceNm;