Changes controller to just hide Devices without visible cons

src/main/java/de/tu_darmstadt/tk/SmartHomeNetworkSim/control/NetworkTreeSettingsController.java

@@ -93,11 +93,27 @@ public class NetworkTreeSettingsController {
 	private void setVisibilityOfConnection(Connection connection, boolean isVisible) {
 		networkTreeSettings.getStatusOfObject(connection).setVisible(isVisible);
 		/**
-		 * Update alle devices
+		 * Update all devices
 		 */
 		for(Port port: connection.getParticipants()){
-			if(port.getOwner()!=null)
-				networkTreeSettings.getStatusOfObject(port.getOwner()).setVisible(isVisible);
+			if(port.getOwner()!=null){
+				if(isVisible){
+					networkTreeSettings.getStatusOfObject(port.getOwner()).setVisible(isVisible);
+				}else{
+					/**
+					 * Just hide Devices which are in no further connection
+					 */
+					boolean found = false;
+					for(Port c:port.getOwner().getPorts()){
+						if(found)break;
+						if(c.getConnection()!=connection&&c.getConnection()!=null && isVisible(c.getConnection())){
+							found=true;
+							break;
+						}
+					}
+					networkTreeSettings.getStatusOfObject(port.getOwner()).setVisible(found);
+				}
+			}
 		}
 		
 	}