From 9f13c49d292825813073dc2375995238800326a6 Mon Sep 17 00:00:00 2001
From: ThorstenB <brehmt@gmail.com>
Date: Fri, 20 May 2011 19:48:05 +0200
Subject: [PATCH] issue #316: panning not working when center-on-aircraft
 enabled Panning feature looked broken to some users since auto-center is
 enabled by default which blocks panning. center-on-aircraft is now disabled
 automatically when view is panned.

---
 src/GUI/MapWidget.cxx | 8 ++++++++
 src/GUI/MapWidget.hxx | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/GUI/MapWidget.cxx b/src/GUI/MapWidget.cxx
index cd648fefb..e3cc5de77 100644
--- a/src/GUI/MapWidget.cxx
+++ b/src/GUI/MapWidget.cxx
@@ -386,6 +386,7 @@ MapWidget::MapWidget(int x, int y, int maxX, int maxY) :
   _zoom = 6;
   _width = maxX - x;
   _height = maxY - y;
+  _hasPanned = false;
 
   MapData::setFont(legendFont);
   MapData::setPalette(colour);
@@ -496,6 +497,7 @@ int MapWidget::checkKey (int key, int updown )
 
 void MapWidget::pan(const SGVec2d& delta)
 {
+  _hasPanned = true; 
   _projectionCenter = unproject(-delta);
 }
 
@@ -525,6 +527,12 @@ void MapWidget::draw(int dx, int dy)
     fgGetDouble("/position/latitude-deg"));
   _magneticHeadings = _root->getBoolValue("magnetic-headings");
 
+  if (_hasPanned)
+  {
+      _root->setBoolValue("centre-on-aircraft", false);
+      _hasPanned = false;
+  }
+  else
   if (_root->getBoolValue("centre-on-aircraft")) {
     _projectionCenter = _aircraft;
   }
diff --git a/src/GUI/MapWidget.hxx b/src/GUI/MapWidget.hxx
index f2722e327..ce9333e32 100644
--- a/src/GUI/MapWidget.hxx
+++ b/src/GUI/MapWidget.hxx
@@ -85,6 +85,7 @@ private:
   double _drawRangeNm;
   double _upHeading; // true heading corresponding to +ve y-axis
   bool _magneticHeadings;
+  bool _hasPanned;
   
   SGGeod _projectionCenter;
   SGGeod _aircraft;