From 369e6b564f41591531bc877d7bfc8c4d1832827b Mon Sep 17 00:00:00 2001
From: James Turner <jmt@Bishop.local>
Date: Mon, 31 Dec 2012 17:39:52 +0000
Subject: [PATCH] Flightplan delegate hook for clearing the FP.

This allows delegates to take action when the flightlan is cleared, and especially, for the default delegate in the route-manager to deactivate itself, and hence the GPS LEG mode - which fixes bug 940 I hope.
---
 src/Instrumentation/gps.cxx       | 2 +-
 src/Navaids/FlightPlan.cxx        | 9 +++++++++
 src/Navaids/FlightPlan.hxx        | 5 +++--
 src/Scripting/NasalPositioned.cxx | 5 +++++
 4 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/Instrumentation/gps.cxx b/src/Instrumentation/gps.cxx
index 158b87c6c..21485d4eb 100644
--- a/src/Instrumentation/gps.cxx
+++ b/src/Instrumentation/gps.cxx
@@ -716,7 +716,7 @@ void GPS::routeManagerSequenced()
   if ((index < 0) || (index >= count)) {
     _currentWaypt=NULL;
     _prevWaypt=NULL;
-    SG_LOG(SG_INSTR, SG_ALERT, "GPS: malformed route, index=" << index);
+    // no active leg on the route
     return;
   }
   
diff --git a/src/Navaids/FlightPlan.cxx b/src/Navaids/FlightPlan.cxx
index b66108fbb..eda1e2db5 100644
--- a/src/Navaids/FlightPlan.cxx
+++ b/src/Navaids/FlightPlan.cxx
@@ -226,6 +226,9 @@ void FlightPlan::clear()
   }
   _legs.clear();  
   
+  if (_delegate) {
+    _delegate->runCleared();
+  }
   unlockDelegate();
 }
   
@@ -1205,5 +1208,11 @@ void FlightPlan::Delegate::runCurrentWaypointChanged()
   if (_inner) _inner->runCurrentWaypointChanged();
   currentWaypointChanged();
 }
+
+void FlightPlan::Delegate::runCleared()
+{
+  if (_inner) _inner->runCleared();
+  cleared();
+}  
   
 } // of namespace flightgear
diff --git a/src/Navaids/FlightPlan.hxx b/src/Navaids/FlightPlan.hxx
index 3eeb02cf6..84944069a 100644
--- a/src/Navaids/FlightPlan.hxx
+++ b/src/Navaids/FlightPlan.hxx
@@ -104,7 +104,7 @@ public:
     virtual void departureChanged() { }
     virtual void arrivalChanged() { }
     virtual void waypointsChanged() { }
-    
+    virtual void cleared() { }
     virtual void currentWaypointChanged() { }
   
   protected:
@@ -117,7 +117,8 @@ public:
     void runArrivalChanged();
     void runWaypointsChanged();
     void runCurrentWaypointChanged();
-    
+    void runCleared();
+      
     friend class FlightPlan;
     
     bool _deleteWithPlan;
diff --git a/src/Scripting/NasalPositioned.cxx b/src/Scripting/NasalPositioned.cxx
index 252342516..cfdadf68f 100644
--- a/src/Scripting/NasalPositioned.cxx
+++ b/src/Scripting/NasalPositioned.cxx
@@ -1772,6 +1772,11 @@ public:
   {
     callDelegateMethod("currentWaypointChanged");
   }
+    
+  virtual void cleared()
+  {
+    callDelegateMethod("cleared");
+  }
 private:
   
   void callDelegateMethod(const char* method)