From 80e77b837291dc60ac0077cea338f2cf9b68cb6f Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Sat, 15 Mar 2014 00:40:48 +0100
Subject: [PATCH] Canvas: set button for drag events.

---
 simgear/canvas/CanvasEventManager.cxx | 6 ++++++
 simgear/canvas/CanvasEventManager.hxx | 1 +
 2 files changed, 7 insertions(+)

diff --git a/simgear/canvas/CanvasEventManager.cxx b/simgear/canvas/CanvasEventManager.cxx
index bac9d769..0033ec62 100644
--- a/simgear/canvas/CanvasEventManager.cxx
+++ b/simgear/canvas/CanvasEventManager.cxx
@@ -63,6 +63,7 @@ namespace canvas
 
   //----------------------------------------------------------------------------
   EventManager::EventManager():
+    _last_button_down(0),
     _current_click_count(0)
   {
 
@@ -77,6 +78,7 @@ namespace canvas
     {
       case Event::MOUSE_DOWN:
         _last_mouse_down = StampedPropagationPath(path, event->getTime());
+        _last_button_down = event->button;
         break;
       case Event::MOUSE_UP:
       {
@@ -106,7 +108,11 @@ namespace canvas
         if( !_last_mouse_down.valid() )
           return false;
         else
+        {
+          // OSG does not set button for drag events.
+          event->button = _last_button_down;
           return propagateEvent(event, _last_mouse_down.path);
+        }
       case Event::MOUSE_MOVE:
         handled |= handleMove(event, path);
         break;
diff --git a/simgear/canvas/CanvasEventManager.hxx b/simgear/canvas/CanvasEventManager.hxx
index efdd0b56..3455f5f8 100644
--- a/simgear/canvas/CanvasEventManager.hxx
+++ b/simgear/canvas/CanvasEventManager.hxx
@@ -65,6 +65,7 @@ namespace canvas
       StampedPropagationPath _last_mouse_down,
                              _last_click,
                              _last_mouse_over;
+      int    _last_button_down;
       size_t _current_click_count;
 
       /**
-- 
2.39.5