Fixed name of DBChanged topic name in GUI and PPSClient

pps_ws/src/d_fall_pps/GUI_Qt/studentGUI/src/MainWindow.cpp

@@ -39,7 +39,7 @@ MainWindow::MainWindow(int argc, char **argv, QWidget *parent) :
 
     setpointPublisher = nodeHandle.advertise<Setpoint>("SafeControllerService/Setpoint", 1);
     setpointSubscriber = nodeHandle.subscribe("SafeControllerService/Setpoint", 1, &MainWindow::setpointCallback, this);
-    DBChangedSubscriber = nodeHandle.subscribe("my_GUI/DBChanged", 1, &MainWindow::DBChangedCallback, this);
+    DBChangedSubscriber = nodeHandle.subscribe("/my_GUI/DBChanged", 1, &MainWindow::DBChangedCallback, this);
 
 
     // communication with PPS Client, just to make it possible to communicate through terminal also we use PPSClient's name
@@ -88,6 +88,7 @@ void MainWindow::enableGUI()
 void MainWindow::DBChangedCallback(const std_msgs::Int32& msg)
 {
     loadCrazyflieContext();
+    ROS_INFO("context reloaded in student_GUI");
 }
 
 void MainWindow::setpointCallback(const Setpoint& newSetpoint)

pps_ws/src/d_fall_pps/src/PPSClient.cpp

@@ -467,7 +467,7 @@ int main(int argc, char* argv[])
     safeControllerServiceSetpointPublisher = namespaceNodeHandle.advertise<d_fall_pps::Setpoint>("SafeControllerService/Setpoint", 1);
 
     // subscriber for DBChanged
-    ros::Subscriber DBChangedSubscriber = namespaceNodeHandle.subscribe("my_GUI/DBChanged", 1, DBChangedCallback);
+    ros::Subscriber DBChangedSubscriber = namespaceNodeHandle.subscribe("/my_GUI/DBChanged", 1, DBChangedCallback);
 
 	//start with safe controller
     flying_state = STATE_MOTORS_OFF;