checkbox to turn on crash prediction

src/widgets/map/acitemmanager.cpp

@@ -2,8 +2,8 @@
 
 ACItemManager::ACItemManager(QString ac_id, WaypointItem* target, AircraftItem* aircraft_item, ArrowItem* arrow, WaypointItem* crash_item, QObject* parent):
     QObject(parent),
-    ac_id(ac_id), target(target), aircraft_item(aircraft_item), crash_item(crash_item),
-    current_nav_shape(nullptr), max_dist_circle(nullptr), arrow_item(arrow), gvf_trajectory(nullptr)
+    ac_id(ac_id), target(target), aircraft_item(aircraft_item),
+    current_nav_shape(nullptr), max_dist_circle(nullptr), arrow_item(arrow), crash_item(crash_item), gvf_trajectory(nullptr)
 {
 
 }

src/widgets/map/mapwidget.cpp

@@ -114,6 +114,13 @@ MapWidget::MapWidget(QWidget *parent) : Map2D(parent),
     connect(show_hidden_wp_action, &QAction::toggled, [=](bool show) {
         setProperty("show_hidden_waypoints", show);
     });
+
+    show_crash_prediction_action = mapMenu->addAction("Show crash prediction");
+    show_crash_prediction_action->setCheckable(true);
+    connect(show_crash_prediction_action, &QAction::toggled, [=](bool show) {
+        setProperty("show_crash_prediction", show);
+    });
+
     auto clear_shapes = mapMenu->addAction("Clear Shapes");
     connect(clear_shapes, &QAction::triggered, this, [=](){
         clearShapes();
@@ -756,6 +763,11 @@ void MapWidget::handleNewAC(QString ac_id) {
         // create crash item at dummy position
         auto crash_item = new WaypointItem(Point2DLatLon(0, 0), ac_id, 16);
         crash_item->setStyle(GraphicsObject::Style::CRASH);
+        if(!show_crash_prediction_action->isChecked()) {
+            crash_item->setSize(0);
+        } else {
+            crash_item->setSize(5);
+        }
         addItem(crash_item);
 
         ArrowItem* arrow = new ArrowItem(ac_id, 15, this);
@@ -1396,3 +1408,16 @@ void MapWidget::showHiddenWaypoints(bool state) {
         }
     }
 }
+
+void MapWidget::showCrashPrediction(bool state) {
+    show_crash_prediction_action->blockSignals(true);
+    show_crash_prediction_action->setChecked(state);
+    show_crash_prediction_action->blockSignals(false);
+    for(auto &itemManager: ac_items_managers) {
+        if(state) {
+            itemManager->getCrashItem()->setSize(5*2);
+        } else {
+            itemManager->getCrashItem()->setSize(0);
+        }
+    }
+}

src/widgets/map/mapwidget.h

@@ -42,6 +42,7 @@ class MapWidget : public Map2D, public Configurable
     Q_OBJECT
     Q_PROPERTY(int ac_arrow_size MEMBER _ac_arrow_size WRITE setAcArrowSize)
     Q_PROPERTY(bool show_hidden_waypoints WRITE showHiddenWaypoints)
+    Q_PROPERTY(bool show_crash_prediction WRITE showCrashPrediction)
 public:
     explicit MapWidget(QWidget *parent = nullptr);
 
@@ -61,6 +62,7 @@ class MapWidget : public Map2D, public Configurable
     void rotateMap(double rot);
     void setAcArrowSize(int s);
     void showHiddenWaypoints(bool state);
+    void showCrashPrediction(bool state);
 
 signals:
     void mouseMoved(QPointF scenePos);
@@ -155,6 +157,7 @@ private slots:
     QMenu* mapMenu;
     QMenu* menu_clear_track;
     QAction* show_hidden_wp_action;
+    QAction* show_crash_prediction_action;
 };
 
 #endif // MAPWIDGET_H