Add warning when flight events remain in queue at ground hit time

(addresses issue #361)

core/resources/l10n/messages.properties

@@ -1693,7 +1693,7 @@ Warning.SUPERSONIC = Body calculations may not be entirely accurate at supersoni
 Warning.RECOVERY_LAUNCH_ROD = Recovery device device deployed while on the launch guide.
 Warning.RECOVERY_HIGH_SPEED = Recovery device deployment at high speed
 Warning.TUMBLE_UNDER_THRUST = Stage began to tumble under thrust.
-
+Warning.EVENT_REMAINING = Event still in queue at ground hit:  
 
 ! Scale dialog
 ScaleDialog.lbl.scaleRocket = Entire rocket

core/src/net/sf/openrocket/aerodynamics/Warning.java

@@ -3,6 +3,7 @@ package net.sf.openrocket.aerodynamics;
 import net.sf.openrocket.l10n.Translator;
 import net.sf.openrocket.motor.Motor;
 import net.sf.openrocket.startup.Application;
+import net.sf.openrocket.simulation.FlightEvent;
 import net.sf.openrocket.unit.UnitGroup;
 
 public abstract class Warning {
@@ -123,6 +124,33 @@ public abstract class Warning {
 			return false;
 		}
 	}
+
+	/**
+	 * A <code>Warning</code> indicating flight events remain in the event queue on ground hit.
+	 *
+	 */
+	public static class EventRemaining extends Warning {
+		private FlightEvent event;
+		
+		/**
+		 * Sole constructor.  The argument is an event remaining in the queue
+		 *
+		 * @param event the event that caused this warning
+		 */
+		public EventRemaining(FlightEvent _event)  {
+			this.event = _event;
+		}
+
+		@Override
+		public String toString() {
+			return trans.get("Warning.EVENT_REMAINING") + event.getType();
+		}
+
+		@Override
+		public boolean replaceBy(Warning other) {
+			return false;
+		}
+	}
 	
 	public static class MissingMotor extends Warning {
 		
@@ -350,5 +378,7 @@ public abstract class Warning {
 	public static final Warning RECOVERY_LAUNCH_ROD = new Other(trans.get("Warning.RECOVERY_LAUNCH_ROD"));
 	
 	public static final Warning TUMBLE_UNDER_THRUST = new Other(trans.get("Warning.TUMBLE_UNDER_THRUST"));
+
+	public static final Warning EVENT_REMAINING = new Other(trans.get("Warning.EVENT_REMAINING"));
 	
 }

core/src/net/sf/openrocket/simulation/BasicEventSimulationEngine.java

@@ -487,6 +487,13 @@ public class BasicEventSimulationEngine implements SimulationEngine {
 				break;
 			
 			case GROUND_HIT:
+				// have I hit the ground while I still have events in the queue?
+				for (FlightEvent e : currentStatus.getEventQueue()) {
+					if ((e.getType() != FlightEvent.Type.ALTITUDE) &&
+						(e.getType() != FlightEvent.Type.SIMULATION_END))
+						currentStatus.getWarnings().add(new Warning.EventRemaining(e));
+				}
+
 				currentStatus.getFlightData().addEvent(event);
 				break;