From 6a67b66e8e479bdfdeafee2b1bde6fadb1843bcd Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 20 Apr 2007 16:15:41 +0000
Subject: [PATCH] Added delay between sequential threading model changes to
 prevent the system from locking up with 'm' is held down, which previous
 would cause the threading model to be thrashed.

---
 applications/osgviewer/osgviewer.cpp | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/applications/osgviewer/osgviewer.cpp b/applications/osgviewer/osgviewer.cpp
index bcd2dd750..1f3a662ae 100644
--- a/applications/osgviewer/osgviewer.cpp
+++ b/applications/osgviewer/osgviewer.cpp
@@ -34,7 +34,11 @@ class ThreadingHandler : public osgGA::GUIEventHandler
 {
 public: 
 
-    ThreadingHandler() {}
+    ThreadingHandler()
+    {
+       _tickOrLastKeyPress = osg::Timer::instance()->tick();
+    }
+
         
     bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
     {
@@ -45,8 +49,14 @@ public:
         {
             case(osgGA::GUIEventAdapter::KEYUP):
             {
-                if (ea.getKey()=='m')
+
+                double delta = osg::Timer::instance()->delta_s(_tickOrLastKeyPress, osg::Timer::instance()->tick());
+
+                if (ea.getKey()=='m' && delta>1.0)
                 {
+
+                    _tickOrLastKeyPress = osg::Timer::instance()->tick();
+
                     switch(viewer->getThreadingModel())
                     {
                         case(osgViewer::Viewer::SingleThreaded):
@@ -101,8 +111,7 @@ public:
         usage.addKeyboardMouseBinding("e","Toggle the placement of the end of frame barrier.");
     }
 
-
-
+    osg::Timer_t _tickOrLastKeyPress;
     bool _done;
 };